I-304 ye-capillary tube Nanocomposites esekelwe kwi-Tungsten Oxide / i-Fullerene njenge-Electrocatalysts kunye ne-Inhibitors ye-Parasitic VO2 +/VO2+ Reactions in Mixed Acids

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Insimbi engenaStainless 304 Coil Tube Chemical Ukubunjwa

I-304 ye-Stainless Steel Coil Tube luhlobo lwe-austenitic chromium-nickel alloy.Ngokutsho kwe-Stainless Steel 304 Coil Tube Manufacturer, inxalenye ephambili kuyo yi-Cr (17% -19%), kunye ne-Ni (8% -10.5%).Ukuze kuphuculwe ukuxhathisa kwayo kwi-corrosion, kukho iimali ezincinci ze-Mn (2%) kunye ne-Si (0.75%).

Isitayile esingenaStainless 304 iCoil Tube Mechanical Properties

Iipropathi zoomatshini zetyhubhu ye-coil yensimbi engenasici engama-304 zezi zilandelayo:

• Amandla okuqina: ≥515MPa
• Amandla esivuno: ≥205MPa
• Ubude: ≥30%

Usetyenziso kunye nokuSetyenziswa kweNsimbi engatyiwa 304 yeCoil Tube

Iindleko eziphezulu ze-vanadium redox flow battery (VRFBs) zinciphisa ukusetyenziswa kwazo ngokubanzi.I-kinetics ye-electrochemical reactions kufuneka iphuculwe ukuze kwandiswe uxinaniso lwamandla kunye nokusebenza kakuhle kwamandla e-VRFB, ngokwenjenjalo kuncitshiswe ixabiso le-kWh le-VRFB.Kulo msebenzi, i-hydrothermally synthesized hydrated tungsten oxide (HWO) nanoparticles, i-C76 kunye ne-C76 / HWO, ifakwe kwi-carbon cloth electrodes kwaye yavavanywa njenge-electrocatalysts ye-VO2 +/VO2 + redox reaction.I-Findle emission scanning electron microscopy (FESEM), i-energy dispersive X-ray spectroscopy (EDX), i-high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), infrared Fourier guqula iSpectroscopy (FTIR) kunye nemilinganiselo ye-angle yoqhagamshelwano.Kufunyenwe ukuba ukongezwa kwe-C76 fullerene kwi-HWO kunokuphucula i-kinetics ye-electrode ngokubhekiselele kwi-VO2 +/VO2 + i-redox yokuphendula ngokunyusa i-conductivity kunye nokubonelela ngamaqela asebenzayo ane-oksijini ebusweni bayo.I-HWO/C76 composite (50 wt% C76) ibonakalise ukuba yeyona ifanelekileyo kwi-VO2+/VO2+ reaction nge-ΔEp ye-176 mV xa kuthelekiswa ne-365 mV yelaphu lekhabhoni elingaphathwanga (UCC).Ukongezelela, i-HWO / C76 composite ibonise inhibition ebalulekileyo ye-parasitic chlorine evolution reaction ngenxa yamaqela asebenzayo e-W-OH.
Imisebenzi emandla yabantu kunye nenguqu ekhawulezileyo yezoshishino ikhokelele kwimfuno ephezulu ngokungenakuthintelwa yombane, ekhula malunga ne-3% ngonyaka1.Kangangamashumi eminyaka, ukusetyenziswa okuxhaphakileyo kwamafutha efosili njengomthombo wamandla kukhokelele ekukhutshweni kwegesi yegreenhouse, okukhokelela kubushushu behlabathi, ungcoliseko lwamanzi kunye nomoya, okusongela i-ecosystem yonke.Ngenxa yoko, ngo-2050 isabelo samandla ahlaziyekayo acocekileyo kunye namandla elanga kulindeleke ukuba afikelele kuma-75% ombane uwonke.Nangona kunjalo, xa ukuveliswa kwamandla ahlaziyekayo kudlula i-20% yemveliso yombane iyonke, igridi iba ingazinzi 1. Ukuphuhliswa kweenkqubo zokugcinwa kwamandla okusebenzayo kubaluleke kakhulu kule nguqu, njengoko kufuneka zigcine umbane ogqithisileyo kunye nokubonelela ngokulinganisela kunye nemfuno.
Phakathi kwazo zonke iinkqubo zokugcina amandla ezifana ne-hybrid vanadium redox flow battery2, zonke iibhetri ze-vanadium redox flow (VRFBs) zezona zihamba phambili ngenxa yeenzuzo ezininzi3 kwaye zithathwa njengesisombululo esona sisombululo sokugcina amandla ixesha elide (~ iminyaka engama-30).Ukusetyenziswa kwemithombo yamandla ahlaziyekayo4.Oku kubangelwa ukuhlukana kwamandla kunye nokuxinana kwamandla, ukuphendula ngokukhawuleza, ubomi obude kunye neendleko zonyaka eziphantsi kwe-$ 65 / kWh xa kuthelekiswa ne-$ 93-140 / kWh ye-Li-ion kunye neebhetri ze-lead-acid kunye ne-279-420 USD / kWh./kWh iibhetri ngokulandelelanayo 4.
Nangona kunjalo, urhwebo lwabo oluxhaphakileyo luyaqhubeka luthintelwa ziindleko ezinkulu zenkqubo, ikakhulu ngenxa yeebhetri packs4,5.Ke ngoko, ukuphucula ukusebenza kwebhetri ngokunyusa i-kinetics yee-half-cell reactions kunokunciphisa ubungakanani bebhetri kwaye ngaloo ndlela kuncitshiswe iindleko.Ngoko ke, ukuhanjiswa kwe-electron ngokukhawuleza kwi-electrode surface kuyadingeka, kuxhomekeke kuyilo, ukubunjwa kunye nesakhiwo se-electrode, ekufuneka ilungiswe ngokucophelela.Nangona i-carbon-based electrode ine-chemicals kunye nokuzinza kwe-electrochemical kunye nokuhamba kakuhle kombane, ukuba ishiywe ingaphendulwanga, i-kinetics yabo iya kuhamba ngokukhawuleza ngenxa yokungabikho kwamaqela asebenzayo oksijini kunye ne-hydrophilicity7,8.Ngoko ke, i-electrocatalysts eyahlukeneyo idibaniswe kunye ne-carbon electrode, ngakumbi i-carbon nanostructures kunye nee-oxide zetsimbi, ukuphucula i-kinetics yazo zombini i-electrodes, ngaloo ndlela inyusa i-kinetics ye-VRFB electrode.
Izinto ezininzi zekhabhoni zisetyenzisiwe, njenge-carbon paper9, i-carbon nanotubes10,11,12,13, i-graphene-based nanostructures14,15,16,17, carbon nanofibers18 kunye nezinye19,20,21,22,23, ngaphandle kwentsapho ye-fullerene. .Kuphononongo lwethu lwangaphambili kwi-C76, sabika ngokokuqala ngqa umsebenzi ogqwesileyo we-electrocatalytic wale fullerene ukuya kwi-VO2 +/VO2 +, xa kuthelekiswa nengubo ye-carbon ephethwe ngubushushu kunye ne-carbon engaphathwanga, ukuchasana kokudluliselwa kwentlawulo kwancitshiswa ngu-99.5% kunye ne-97% ye-24.Ukusebenza kwe-catalytic yezinto zekhabhoni ze-VO2 +/VO2 + yokuphendula xa kuthelekiswa ne-C76 kuboniswe kwiThebhile S1.Ngakolunye uhlangothi, ezininzi ii-oxide zetsimbi ezifana ne-CeO225, ZrO226, MoO327, NiO28, SnO229, Cr2O330 kunye ne-WO331, 32, 33, 34, 35, 36, 37, 38 zisetyenziswa ngenxa yokwanda kokumanzi kunye nomxholo ophezulu we-oxygen.amaqela.Itheyibhile i-S2 ibonisa ukusebenza kwe-catalytic kwezi oxide zentsimbi kwi-VO2 +/VO2+ reaction.I-WO3 isetyenziswe kwinani elikhulu lemisebenzi ngenxa yeendleko zayo eziphantsi, ukuzinza okuphezulu kwimidiya ye-acidic, kunye nomsebenzi ophezulu we-catalytic31,32,33,34,35,36,37,38.Nangona kunjalo, i-WO3 ibonise ukuphuculwa okuncinci kwi-cathode kinetics.Ukuphucula ukuqhutyelwa kwe-WO3, umphumo wokusetyenziswa kwe-tungsten oxide eyancitshisiweyo (W18O49) kumsebenzi we-electrode omuhle wavavanywa38.I-Hydrated tungsten oxide (HWO) ayizange ihlolwe kwizicelo ze-VRFB, nangona ibonise umsebenzi ophezulu kwizicelo ze-supercapacitor ngenxa yokusabalalisa i-cation ngokukhawuleza xa kuthelekiswa ne-anhydrous WOx39,40.Isizukulwana sesithathu ibhetri ye-vanadium redox flow flow isebenzisa i-electrolyte ye-asidi edibeneyo eyenziwe yi-HCl kunye ne-H2SO4 ukuphucula ukusebenza kwebhetri kunye nokuphucula ukunyibilika kunye nokuzinza kwe-vanadium ions kwi-electrolyte.Nangona kunjalo, i-parasitic chlorine evolution reaction iye yaba yenye yezinto ezingalunganga zesizukulwana sesithathu, ngoko ke ukufumana iindlela zokucinezela ukusabela kovavanyo lweklorine kuye kwaba ngumsebenzi wamaqela amaninzi ophando.
Apha, iimvavanyo zokusabela ze-VO2+/VO2+ zenziwa kwii-HWO/C76 ze-composites ezifakwe kwi-carbon cloth electrode ukuze kufumaneke ibhalansi phakathi kwe-conductivity yombane ye-composites kunye ne-redox reaction kinetics kumphezulu we-electrode ngelixa icinezela i-parasitic chlorine deposition.impendulo (KVR).I-hydrated tungsten oxide (HWO) i-nanoparticles yenziwe ngendlela elula ye-hydrothermal.Iimvavanyo zenziwe kwi-electrolyte ye-asidi exutywe (H2SO4 / HCl) ukulinganisa isizukulwana sesithathu se-VRFB (G3) ukuze kube lula kunye nokuphanda umphumo we-HWO kwi-parasitic chlorine evolution reaction42.
Vanadium(IV) sulfate oxide hydrate (VOSO4, 99.9%, Alfa-Aeser), sulfuric acid (H2SO4), hydrochloric acid (HCl), dimethylformamide (DMF, Sigma-Aldrich), polyvinylidene fluoride (PVDF, Sigma-Aldrich), isodiyam I-Tungsten oxide dihydrate (Na2WO4, 99%, Sigma-Aldrich) kunye ne-hydrophilic carbon cloth ELAT (i-Fuel Cell Store) isetyenziswe kolu cwaningo.
I-Hydrated tungsten oxide (HWO) yalungiswa yi-hydrothermal reaction apho i-2 g yetyuwa ye-Na2WO4 yanyibilika kwi-12 ml ye-HO de kwafunyanwa isisombululo esingenambala, kwaye i-12 ml ye-2 M HCl yongezwa i-dropwise kude kube ukukhanya okumthubi kunqunyanyiswa. yafunyanwa.ukumiswa.Ukusabela kwe-hydrothermal kwenziwa kwi-Teflon efakwe kwi-autoclave yensimbi engenasici kwi-oven kwi-180 ºC ngeeyure ze-3.Intsalela iqokelelwe ngokuhluzwa, ihlanjwe ngamaxesha e-3 nge-ethanol kunye namanzi, yomiswe kwi-oven kwi-70 ° C kwi- ~ 3 h, kwaye emva koko iphantsi ukuze ifumane i-HWO powder eluhlaza okwesibhakabhaka.
I-electrodes ye-carbon cloth efunyenweyo (engaphathwanga) (CCTs) isetyenziswe ngendlela efunyenwe ngayo okanye iphantsi konyango lokufudumala kwisithando somlilo kwi-450 ° C kwi-10 h kwizinga lokushisa kwe-15 ° C / min emoyeni ukuya. fumana unyango lwe-UCC (TCC), s Ngokufanayo nomsebenzi wangaphambili 24. I-UCC kunye ne-TCC zasikwa kwii-electrode malunga ne-1.5 cm ububanzi kunye ne-7 cm ubude.Ukumiswa kwe-C76, i-HWO, i-HWO-10% ye-C76, i-HWO-30% ye-C76 kunye ne-HWO-50% ye-C76 yalungiswa ngokongeza i-20 mg ye-powder esebenzayo kunye ne-10 wt% (~ 2.22 mg) ye-PVDF i-binder ukuya kwi- ~ 1 ml ye I-DMF ilungiselelwe kwaye ifakwe kwi-sonicated iyure ye-1 ukuphucula ukufana.Emva koko i-2 mg ye-C76, i-HWO kunye ne-HWO-C76 i-composites isetyenziswe malunga ne-1.5 cm2 yendawo ye-electrode esebenzayo ye-UCC.Zonke ii-catalysts zilayishwe kwi-electrodes ye-UCC kwaye i-TCC yayisetyenziselwa iinjongo zokuthelekisa kuphela, njengoko umsebenzi wethu wangaphambili ubonise ukuba unyango lokushisa alufunwa i-24.Ukulungiswa kwempembelelo kwaphunyezwa ngokuxubha i-100 µl yokunqunyanyiswa (umthwalo we-2 mg) ukwenzela ukufana okukhulu.Emva koko zonke ii-electrode zomiswa kwi-oven ngobusuku obungama-60 ° C.Ii-electrode zilinganiswa ngaphambi nangemva kokuqinisekisa ukulayishwa kwesitokhwe ngokuchanekileyo.Ukuze ube nommandla othile wejometri (~ 1.5 cm2) kunye nokuthintela ukunyuka kwe-vanadium electrolyte kwi-electrodes ngenxa yempembelelo ye-capillary, i-parafini encinci isetyenziswe phezu kwezinto ezisebenzayo.
Imakroskopu ye-electron ekhutshwayo ekhutshwayo (FESEM, Zeiss SEM Ultra 60.5 kV) yasetyenziswa ukujonga i-HWO surface morphology.I-X-ray ye-Energy dispersive spectroscopy exhotyiswe nge-Feii8SEM (EDX, Zeiss AG) isetyenziswe ukwenza imephu ye-HWO-50% C76 element kwii-electrode ze-UCC.I-microscope ye-electron yokudluliselwa kwesisombululo esiphezulu (i-HR-TEM, i-JOEL JEM-2100) esebenza kwi-voltage ekhawulezayo ye-200 kV isetyenziselwe ukufumana imifanekiso ephezulu kunye nezangqa ze-diffraction zamasuntswana e-HWO.Sebenzisa i-Crystallographic Tool Box (CrysTBox) software ukuhlalutya amakhonkco e-HWO diffraction usebenzisa umsebenzi we-ringGUI kwaye uthelekise iziphumo kunye neemodeli ze-XRD.Ubume kunye ne-graphitization ye-UCC kunye ne-TCC inqunywe yi-X-ray diffraction (XRD) kwizinga lokuskena kwe-2.4 ° / min ukusuka kwi-5 ° ukuya kwi-70 ° kunye ne-Cu Kα (λ = 1.54060 Å) usebenzisa i-Panalytical X-ray diffractometer.(Imodeli 3600).I-XRD ibonisa ubume bekristale kunye nezigaba ze-HWO.I-software ye-PANalytical X'Pert HighScore yayisetyenziselwa ukufanisa iincopho ze-HWO kwiimephu ze-tungsten oxide ezikhoyo kwi-database45.Thelekisa iziphumo ze-HWO kunye neziphumo ze-TEM.Ukwakhiwa kweekhemikhali kunye nemeko yeesampuli ze-HWO zinqunywe yi-X-ray photoelectron spectroscopy (XPS, ESCALAB 250Xi, ThermoScientific).I-software ye-CASA-XPS (v 2.3.15) isetyenziswe kwi-peak deconvolution kunye nohlalutyo lwedatha.I-Fourier transform spectroscopy ye-infrared (FTIR, kusetyenziswa i-Perkin Elmer class KBr FTIR spectrometer) imilinganiselo yenziwe ukumisela amaqela asebenzayo omphezulu we-HWO kunye ne-HWO-50% C76.Thelekisa iziphumo kunye neziphumo zeXPS.Imilinganiselo ye-angle yoqhagamshelwano (KRUSS DSA25) nayo yayisetyenziselwa ukubonakalisa ukumanzi kwee-electrodes.
Kuyo yonke imilinganiselo ye-electrochemical, i-Biologic SP 300 workstation yasetyenziswa.I-Cyclic voltammetry (CV) kunye ne-electrochemical impedance spectroscopy (EIS) yayisetyenziselwa ukufunda i-electrode kinetics ye-VO2 +/VO2+ redox reaction kunye nefuthe le-reagent diffusion (VOSO4 (VO2 +)) kwizinga lokuphendula.Zomibini iitekhnoloji zisebenzisa iseli ye-electrode emithathu ene-electrolyte concentration ye-0.1 M VOSO4 (V4 +) echithwe kwi-1 M H2SO4 + 1 M HCl (i-acid exutyiweyo).Yonke idatha ye-electrochemical enikeziweyo i-IR ilungisiwe.I-calomel electrode (SCE) kunye ne-platinum (Pt) i-coil isetyenziswe njengereferensi kunye ne-counter electrode, ngokulandelanayo.Kwi-CV, iireyithi zokuskena (ν) ze-5, 20, kunye ne-50 mV/s zisetyenziswe kwifestile enokwenzeka (0–1) V xa kuthelekiswa ne-SCE ye-VO2+/VO2+, emva koko ilungiswe kwisikali se-SHE ukwenza iploti (VSCE = 0.242 V malunga ne-HSE) .Ukuphanda ukugcinwa komsebenzi we-electrode, ukuphinda kusetyenziswe i-CV kwenziwa kwi-UCC, TCC, UCC-C76, UCC-HWO kunye ne-UCC-HWO-50% C76 ku-ν elingana ne-5 mV/s.Kwimilinganiselo ye-EIS ye-VO2 +/VO2+ redox reaction, i-frequency range ye-0.01-105 Hz kunye ne-open circuit voltage (OCV) ukuphazamiseka kwe-10 mV yasetyenziswa.Uvavanyo ngalunye luphindwe ngamaxesha e-2-3 ukuqinisekisa ukuhambelana kweziphumo.Isantya esingaqhelekanga (k0) sifunyenwe ngendlela ye-Nicholson46,47.
I-hydrated tungsten oxide (HVO) yenziwe ngempumelelo ngendlela ye-hydrothermal.Umfanekiso we-SEM kwifig.I-1a ibonisa ukuba i-HWO egciniweyo iqulethwe ngamaqoqo e-nanoparticles kunye nobukhulu be-particle kuluhlu lwe-25-50 nm.
Ipatheni ye-X-ray diffraction ye-HWO ibonisa iincopho (001) kunye (002) kwi- ~ 23.5 ° kunye ne- ~ 47.5 °, ngokulandelanayo, iimpawu ze-nonstoichiometric WO2.63 (W32O84) (PDF 077-0810, a = 21.4 Å, b = 17.8 Å, c = 3.8 Å, α = β = γ = 90 °), ehambelana nombala wayo oluhlaza obonakalayo (Umfanekiso 1b) 48,49.Ezinye iincopho malunga ne-20.5 °, 27.1 °, 28.1 °, 30.8 °, 35.7 °, 36.7 ° kunye ne-52.7 ° ku-(140), (620), (350), (720), (740), (560).kunye (970) iindiza ze-diffraction, ngokulandelanayo, i-49 orthorhombic WO2.63.Songara et al.I-43 isebenzise indlela efanayo yokwenziwa ukufumana imveliso emhlophe, eyayibangelwa ubukho be-WO3 (H2O) 0.333.Nangona kunjalo, kulo msebenzi, ngenxa yeemeko ezahlukeneyo, imveliso eluhlaza okwesibhakabhaka-grey yafunyanwa, ebonisa ukuhlalisana kwe-WO3 (H2O) 0.333 (PDF 087-1203, a = 7.3 Å, b = 12.5 Å, c = 7.7) kwi-Å , α = β = γ = 90 °) kunye nefom encitshisiweyo ye-tungsten oxide.Uhlalutyo lwe-Semiquantitative kunye ne-software ye-X'Pert HighScore ibonise i-26% WO3 (H2O) 0.333: 74% W32O84.Ekubeni i-W32O84 iqukethe i-W6+ kunye ne-W4+ (1.67: 1 W6+: W4+), umxholo oqikelelwayo we-W6+ kunye ne-W4+ malunga ne-72% W6+ kunye ne-28% W4+, ngokulandelanayo.Imifanekiso ye-SEM, i-1-yesibini i-XPS ye-spectra kwinqanaba le-nucleus, imifanekiso ye-TEM, i-FTIR spectra kunye ne-Raman spectra ye-C76 particles yaboniswa kwiphepha lethu langaphambili24.Ngokutsho kwe-Kawada et al.50,51, i-X-ray diffraction pattern ye-C76 ibonisa isakhiwo se-monoclinic se-FCC emva kokususwa kwe-toluene.
Imifanekiso ye-SEM kwifig.I-2a kunye ne-b ibonisa ukufakwa ngempumelelo kwe-HWO kunye ne-HWO-50% C76 kunye naphakathi kwe-carbon fibers ye-electrode ye-UCC.Imephu ye-Elemental ye-tungsten, i-carbon kunye ne-oksijini kumfanekiso we-SEM kwi-Fig. 2c iboniswe kumkhiwane.I-2d-f ebonisa ukuba i-tungsten kunye nekhabhoni zixutywe ngokufanayo (ebonisa ukusabalalisa okufanayo) phezu kwendawo ye-electrode kwaye i-composite ayifakwanga ngokulinganayo.ngenxa yobume bendlela yemvula.
Imifanekiso ye-SEM yeengqungquthela ze-HWO ezifakwe (a) kunye neengqungquthela ze-HWO-C76 (b).Imephu ye-EDX elayishwe kwi-HWO-C76 kwi-UCC isebenzisa indawo emfanekisweni (c) ibonisa ukuhanjiswa kwe-tungsten (d), i-carbon (e), kunye ne-oxygen (f) kwisampuli.
I-HR-TEM yayisetyenziselwa ukulinganisa okuphezulu kunye nolwazi lwecrystallographic (Umfanekiso 3).I-HWO ibonisa i-nanocube morphology njengoko kuboniswe kwi-Figure 3a kwaye ngokucacileyo ngakumbi kwi-Figure 3b.Ngokukhulisa i-nanocube yokuphazamiseka kwendawo ekhethiweyo, i-grating structure kunye ne-diffraction planes eyanelisayo umthetho kaBragg inokubonwa njengoko kuboniswe kuMzobo 3c, eqinisekisa i-crystallinity yezinto eziphathekayo.Kwi-inset ukuya kwi-Fig. 3c ibonisa umgama d 3.3 Å ehambelana ne (022) kunye (620) iindiza ze-diffraction kwi-WO3 (H2O) 0.333 kunye ne-W32O84, 43, 44, 49 izigaba, ngokulandelanayo.Oku kuhambelana nohlalutyo olungentla lwe-XRD (umzobo 1b) ekubeni umgama wendiza ye-grating ebonwayo d (Umfanekiso we-3c) uhambelana neyona nto inamandla ye-XRD kwisampuli ye-HWO.Iisampulu zamakhonkco nazo ziboniswe kwifig.3d, apho ikhonkco ngalinye lihambelana nendiza eyahlukileyo.I-WO3 (H2O) i-0.333 kunye ne-W32O84 iindiza zinemibala emhlophe kunye ne-blue, ngokulandelanayo, kunye neengqungquthela zabo ze-XRD ezihambelanayo nazo ziboniswe kwi-Fig. 1b.Iringi yokuqala eboniswe kwipatheni yeringi ihambelana nencopho yokuqala ephawulweyo kwipatheni ye-x-reyi ye (022) okanye (620) ye-diffraction plane.Ukusuka (022) ukuya (402) iindandatho, d-umgama we-3.30, 3.17, 2.38, 1.93, kunye ne-1.69 Å zifunyenwe, ezihambelana nemilinganiselo ye-XRD ye-3.30, 3.17, 2 .45, 1.63 kunye ne-1.63.Å, 44, 45, ngokulandelelanayo.
(a) Umfanekiso we-HR-TEM we-HWO, (b) ubonisa umfanekiso owandisiweyo.Imifanekiso yeeplani ze-grating iboniswe kwi-(c), kunye ne-inset (c) ibonisa umfanekiso owandisiweyo weendiza kunye ne-interval d 0.33 nm ehambelana ne-(002) kunye (620) iindiza.(d) Ipateni ye-HWO ring ebonisa iindiza ezinxulumene ne-WO3 (H2O) 0.333 (emhlophe) kunye ne-W32O84 (eblue) izigaba.
Uhlalutyo lwe-XPS lwenziwa ukumisela i-chemistry yomhlaba kunye ne-oxidation state ye-tungsten (Amanani S1 kunye ne-4).I-spectrum yoluhlu olubanzi lwe-XPS ye-scan ye-HWO ehlanganisiweyo iboniswe kwi-Fig.S1, ebonisa ubukho be-tungsten.I-XPS ye-scan-scan spectra engundoqo ye-W 4f kunye ne-O 1s amanqanaba aboniswe kwiiFigs.4a kunye no-b, ngokulandelelanayo.I-W 4f spectrum yahlulahlulwe yazimbini ezijikelezileyo eziphindwe kabini ezihambelana namandla abophayo emo ye-oxidation. I-4f5/2 kunye ne-W 4f7/2 kwi-36.6 kunye ne-34.9 eV ziyimpawu ze-W4 + state, ngokulandelanayo.Ubukho besimo se-oxidation (W4 +) buqinisekisa ngakumbi ukubunjwa kwe-WO2.63 engekho stoichiometric, ngelixa ubukho be-W6 + bubonisa i-stoichiometric WO3 ngenxa ye-WO3 (H2O) 0.333.Idatha efakiweyo ibonise ukuba iipesenti ze-athomu ze-W6+ kunye ne-W4+ zazingama-85% kunye ne-15%, ngokulandelanayo, ezazisondele kakhulu kumaxabiso aqikelelweyo kwidatha ye-XRD, xa kunikwa umahluko phakathi kwezi teknoloji zimbini.Zombini iindlela zibonelela ngolwazi lobungakanani ngokuchaneka okuphantsi, ngakumbi i-XRD.Ukongeza, ezi ndlela zimbini zihlalutya iindawo ezahlukeneyo zemathiriyeli kuba i-XRD yindlela yobuninzi ngelixa i-XPS yindlela yomphezulu esondela kwiinanometers ezimbalwa.I-spectrum ye-O 1s iyahlukana ibe yi-peaks ezimbini kwi-533 (22.2%) kunye ne-530.4 eV (77.8%).Eyokuqala ihambelana ne-OH, kwaye okwesibini kwiibhondi ze-oksijini kwi-lattice kwi-WO.Ubukho bamaqela asebenzayo e-OH ahambelana neempawu ze-hydration ze-HWO.
Uhlalutyo lwe-FTIR luye lwenziwa kwakhona kwezi sampuli zimbini ukuhlola ubukho bamaqela asebenzayo kunye neemolekyuli zamanzi ezilungelelanisiweyo kwisakhiwo se-hydrated HWO.Iziphumo zibonisa ukuba isampuli ye-HWO-50% ye-C76 kunye neziphumo ze-FT-IR HWO zibukeka zifana ngenxa yobukho be-HWO, kodwa ubuninzi beengqungquthela ziyahluka ngenxa yeemali ezahlukeneyo zesampulu ezisetyenziswe ngexesha lokulungiselela uhlalutyo (umzobo 5a). ).HWO-50% C76 Zonke iincopho ze-fulerene ezingama-24 ziboniswa ngaphandle kwe-tungsten oxide peak.Ineenkcukacha kwifig.I-5a ibonisa ukuba zombini iisampulu zibonisa ibhanti ebanzi kakhulu ebanzi kwi- ~ 710 / cm, echazwe kwi-OWO yokwelula i-vibrations kwisakhiwo se-lattice ye-HWO, kunye negxalaba eliqinileyo kwi- ~ 840 / cm, elibangelwa yi-WO.ibhendi ebukhali kwi ~ 1610 / cm inxulumene ne-vibration egobayo ye-OH, kunye nebhendi yokufunxa ebanzi kwi ~ 3400 / cm inxulumene nokungcangcazela kwe-OH kwiqela le-hydroxyl43.Ezi ziphumo zihambelana ne-XPS spectrum kwi-Fig. 4b, apho iqela elisebenzayo le-WO linokubonelela ngeendawo ezisebenzayo ze-VO2 +/VO2 + reaction.
Uhlalutyo lwe-FTIR ye-HWO kunye ne-HWO-50% C76 (a) ebonisa amaqela asebenzayo kunye nemilinganiselo ye-angle yoqhagamshelwano (b, c).
Iqela le-OH linokwenza kwakhona i-VO2 +/VO2+ reaction, ngaloo ndlela ikhulise i-hydrophilicity ye-electrode, ngaloo ndlela ikhuthaza ukusabalalisa kunye namazinga okudlulisa i-electron.Isampula ye-HWO-50% ye-C76 ibonisa i-peak ye-C76 eyongezelelweyo njengoko kuboniswe kumzobo.Incopho kwi ~ 2905, 2375, 1705, 1607, kunye ne-1445 cm3 inokwabelwa kwi-CH, O=C=O, C=O, C=C, kunye ne-CO ezolula ii-vibrations, ngokulandelanayo.Kuyaziwa ukuba amaqela asebenzayo oksijini C = O kunye ne-CO angasebenza njengamaziko asebenzayo kwi-redox reactions of vanadium.Ukuvavanya nokuthelekisa ukumanzisa kwee-electrode ezimbini, imilinganiselo ye-angle yoqhagamshelwano isetyenziswe njengoko kuboniswe kwi-Fig. 5b, c.I-electrode ye-HWO ngokukhawuleza ithatha amaconsi amanzi, ebonisa i-superhydrophilicity ngenxa yamaqela asebenzayo e-OH akhoyo.I-HWO-50% ye-C76 i-hydrophobic ngakumbi, kunye ne-angle yoqhagamshelwano malunga ne-135 ° emva kwemizuzwana ye-10.Nangona kunjalo, kwimilinganiselo ye-electrochemical, i-electrode ye-HWO-50% C76 yayimanzi ngokupheleleyo ngaphantsi komzuzu.Imilinganiselo yokumanzisa ihambelana neziphumo ze-XPS kunye ne-FTIR, ezicebisa ukuba amaqela e-OH amaninzi kumphezulu we-HWO awenza abe ne-hydrophilic ngakumbi.
Iimpendulo ze-VO2 +/VO2+ ze-HWO kunye ne-HWO-C76 nanocomposites zavavanywa kwaye kwakulindeleke ukuba i-HWO icinezele ukuguquka kwegesi ye-chlorine eyenzeka ngexesha le-VO2 +/VO2 + ukuphendula kwii-asidi ezixubileyo, ngelixa i-C76 iya kuphinda iqhube i-VO2 +/ VO2 + efunwayo.Ukumiswa kwe-HWO equkethe i-10%, i-30% kunye ne-50% ye-C76 isetyenziswe kwi-electrodes ye-UCC kunye nomthwalo opheleleyo malunga ne-2 mg / cm2.
Njengoko kubonisiwe kwifig.I-6, i-kinetics ye-VO2 +/VO2+ yokusabela kwi-electrode surface yahlolwa kusetyenziswa i-CV kwii-electrolytes ezixubileyo ze-acidic.Currents ziboniswa njenge I/Ipa ukuququzelela uthelekiso lwe-ΔEp kunye ne-Ipa/Ipc.Ii-catalysts ezahlukeneyo zifumaneka ngokuthe ngqo kumfanekiso.Idatha yeyunithi yendawo yangoku iboniswe kuMfanekiso 2S.Kwikhiwane.Umzobo 6a ubonisa ukuba i-HWO yonyusa kancinane izinga lokudluliselwa kwe-electron ye-VO2 +/VO2+ redox reaction on the surface electrode and suppresses reaction of parasitic chlorine evolution.Nangona kunjalo, i-C76 inyusa kakhulu izinga lokudluliselwa kwe-electron kwaye ibangele ukusabela kwe-chlorine evolution.Ngoko ke, i-complex ene-conductivity echanekileyo ye-HWO kunye ne-C76 kufuneka ibe nomsebenzi ongcono kakhulu kunye nekhono eliphezulu lokuthintela ukusabela kweklorini.Kwafunyaniswa ukuba emva kokunyuswa komxholo we-C76, umsebenzi we-electrochemical we-electrode uphuculwe, njengoko kubonakaliswe ngokuncipha kwe-ΔEp kunye nokunyuka kwe-Ipa / Ipc ratio (Itheyibhile S3).Oku kwaqinisekiswa kwakhona ngamaxabiso e-RCT akhutshwe kwi-Nyquist plot in Fig. 6d (itheyibhile S3), apho kwafunyaniswa ukuba ixabiso le-RCT liyancipha ngokunyuka komxholo weC76.Ezi ziphumo zikwahambelana nophononongo luka-Lee apho ukongezwa kwekhabhoni ye-mesoporous kwi-mesoporous WO3 kuphucule i-kinetics yokudluliselwa kwentlawulo kwi-VO2+/VO2+35.Oku kubonisa ukuba ukusabela okulungileyo kunokuxhomekeka ngakumbi kwi-conductivity ye-electrode (C = C bond) 18,24,35,36,37.Ngenxa yotshintsho kwijometri yokulungelelaniswa phakathi kwe- [VO (H2O) 5] 2+ kunye ne- [VO2 (H2O) 4]+, i-C76 inokunciphisa kwakhona ukuphendula ngokugqithisileyo ngokunciphisa amandla ezicubu.Nangona kunjalo, oku akunakwenzeka nge-electrode ye-HWO.
(a) Ukuziphatha kwe-Cyclic voltammetric ye-UCC kunye ne-HWO-C76 edibeneyo kunye ne-HWO: i-C76 ehlukeneyo yokulinganisa kwi-VO2 +/VO2+ reactions kwi-0.1 M VOSO4 / 1 M H2SO4 + 1 M HCl electrolyte (ku-ν = 5 mV / s).(b) Randles-Sevchik kunye (c) ne-Nicholson's VO2+/VO2+ indlela yokuqikelela ukusasazwa kobuchule kunye nokufumana amaxabiso e-k0 ​​(d).
I-HWO-50% ye-C76 yayingeyiyo kuphela i-HWO-50% ye-C76 ebonisa phantse umsebenzi ofanayo we-electrocatalytic njenge-C76 ye-VO2 +/VO2+ reaction, kodwa, ngakumbi umdla, iphinde yacinezela ukuvela kwegesi ye-chlorine xa kuthelekiswa ne-C76, njengoko kubonisiwe kulo mfanekiso.6a, ukongeza ekuboniseni isangqa esincinci kwifig.I-6g (i-RCT ephantsi).I-C76 ibonise i-Ipa / Ipc ephezulu ebonakalayo kune-HWO-50% C76 (Itheyibhile ye-S3), kungekhona ngenxa yokuphucula ukuguqulwa kwempendulo, kodwa ngenxa yokugqithiswa kwe-chlorine yokunciphisa i-1.2 V xa kuthelekiswa ne-SHE.Ukusebenza kakuhle kwe-HWO-50% ye-C76 kubangelwa ukusebenzisana phakathi kwe-C76 ehlawuliswa kakubi kakhulu kunye nokumanzi okuphezulu kunye nokusebenza kwe-catalytic ye-W-OH kwi-HWO.Ngelixa ukukhutshwa kweklorini encinci kuya kuphucula ukusebenza kakuhle kokutshaja kweseli epheleleyo, i-kinetics ephuculweyo iya kwandisa ukusebenza kombane opheleleyo weseli.
Ngokutsho kwe-equation S1, kwi-quasi-reversible (ngokucotha i-electron transfer) i-reaction elawulwa yi-diffusion, i-peak current (IP) ixhomekeke kwinani le-electrons (n), indawo ye-electrode (A), i-diffusion coefficient (D), inani. yee-electron zokudlulisa i-coefficient (α) kunye nesantya sokuskena (ν).Ukuze ufunde ukuziphatha okulawulwayo kokusasazeka kwezinto ezivavanyiweyo, ubudlelwane phakathi kwe-IP kunye ne-ν1/2 yacwangciswa kwaye yaboniswa kwi-Fig. 6b.Kuba zonke izixhobo zibonisa ubudlelwane bomgca, impendulo ilawulwa yi-diffusion.Ekubeni i-VO2 +/VO2 + i-reaction i-quasi-reversible, i-slope yomgca ixhomekeke kwi-coefficient yokusabalalisa kunye nexabiso le-α (i-equation S1).Ngenxa ye-coefficient yokusasazwa rhoqo (≈ 4 × 10-6 cm2 / s) 52, umahluko kumgca we-slope ubonisa ngokuthe ngqo amaxabiso ahlukeneyo e-α kwaye ngoko ke amazinga ahlukeneyo okudluliselwa kwe-electron kumphezulu we-electrode, kunye ne-C76 kunye ne-HWO -50 I-% C76, ebonisa amathambeka aphakamileyo (izinga eliphezulu lokudlulisa i-electron).
I-low-frequency ye-Warburg slopes (W) eboniswe kwiThebhile S3 (Fig. 6d) inamaxabiso kufutshane ne-1 yazo zonke izinto eziphathekayo, ebonisa ukusasazwa okugqibeleleyo kwamasuntswana e-redox kunye nokuqinisekisa ukuziphatha komgca we-IP ngokuchasene ne-ν1/2 ye-CV.imilinganiselo .Kwi-HWO-50% C76, i-Warburg slope iyaphambuka kubunye ukuya kwi-1.32, iphakamisa igalelo kungekuphela nje kwi-semi-infinite diffusion ye-reactants (VO2 +), kodwa mhlawumbi nokuziphatha okubhityileyo kwindlela yokuziphatha yokusabalalisa ngenxa ye-electrode porosity.
Ukuqhubela phambili ukuhlalutya ukuguqulwa (izinga lokudluliselwa kwe-electron) ye-VO2 +/VO2+ redox reaction, indlela yokuphendula ye-Nicholson quasi-reversible reaction nayo yasetyenziswa ukumisela izinga eliqhelekileyo le-k041.42.Oku kwenziwa ngokucwangcisa iparamitha engena dimensionless kinetic Ψ njengomsebenzi we ΔEp njengomsebenzi we ν−1/2 usebenzisa i S2 equation.Itheyibhile S4 ibonisa iziphumo ze-Ψ zexabiso lemathiriyeli ye-electrode nganye.Cwangcisa iziphumo (Umfanekiso 6c) ukufumana i-k0 × 104 cm/s (ebhalwe ecaleni komqolo ngamnye kwaye iboniswe kwiThebhile S4) usebenzisa i-equation S3 yokuthambeka kweploti nganye.I-HWO-50% i-C76 ifunyenwe i-slope ephezulu (umzobo 6c) kwaye ngoko ke ixabiso eliphezulu le-k0 le-2.47 × 10-4 cm / s.Oku kuthetha ukuba le electrode inika i-kinetics ekhawulezayo ehambelana ne-CV kunye neziphumo ze-EIS kwiMifanekiso 6a kunye ne-d kunye neThebhile S3.Ukongeza, amaxabiso e-k0 nawo afunyenwe kwizicwangciso zeNyquist (Umfanekiso 6d) we-Equation S4 usebenzisa amaxabiso e-RCT (Itheyibhile S3).Ezi ziphumo ze-k0 ezivela kwi-EIS zishwankathelwa kwiThebhile ye-S4 kwaye ikwabonisa ukuba i-HWO-50% ye-C76 ibonisa izinga eliphezulu lokudluliselwa kwe-electron ngenxa yesiphumo se-synergistic.Nangona ixabiso le-k0 lihluka ngenxa yemvelaphi eyahlukileyo yendlela nganye, lisabonisa ulandelelwano olufanayo lobukhulu kwaye lubonisa ukuhambelana.
Ukuqonda ngokupheleleyo i-kinetics egqwesileyo enokuthi iphunyezwe, kubalulekile ukuthelekisa izinto ezifanelekileyo ze-electrode kunye ne-UCC engaxutywanga kunye ne-TCC electrodes.Kwi-VO2 +/VO2+ reaction, i-HWO-C76 ayibonisanga kuphela eyona ΔEp ephantsi kunye nokubuyiselwa umva okungcono, kodwa ikwacinezele kakhulu i-parasitic chlorine evolution reaction xa kuthelekiswa ne-TCC, njengoko kubonisiwe kukuhla okubalulekileyo ngoku kwi-1.45 V xa kuthelekiswa nokubona i-OHA (Fig. 7a).Ngokumalunga nokuzinza, sasicinga ukuba i-HWO-50% ye-C76 izinzile ngokomzimba kuba i-catalyst yayixutywe kunye ne-PVDF binder kwaye isetyenziswe kwi-carbon cloth electrodes.Xa kuthelekiswa ne-50 mV ye-UCC, i-HWO-50% i-C76 ibonise ukutshintshwa okuphezulu kwe-44 mV emva kwemijikelezo ye-150 (izinga lokuthotywa kwe-0.29 mV / umjikelo) (Umfanekiso 7b).Akunakuba ngumahluko omkhulu, kodwa i-kinetics ye-electrode ye-UCC icotha kakhulu kwaye ithobisa ngokukhwela ibhayisekile, ngakumbi ukusabela ngasemva.Nangona ukuguqulwa kwe-TCC kubhetele kakhulu kunoko kwe-UCC, i-TCC yafunyaniswa inencopho enkulu yokutshintsha kwe-73 mV emva kwemijikelo ye-150, enokuthi ibe ngenxa yesixa esikhulu seklorine ekhutshwe kumphezulu wayo.Ukuqinisekisa ukuba i-catalyst ibambelela kakuhle kwi-electrode surface.Njengoko kunokubonwa kuwo onke ama-electrode avavanyiweyo, kwanabo bangenayo i-catalysts exhaswayo babonisa amanqanaba ahlukeneyo okungazinzi kwebhayisikile, ebonisa ukuba utshintsho kwincopho yokwahlula ngexesha lokuhamba ngebhayisikile kungenxa yokuvalwa kwezinto ngenxa yokutshintsha kweekhemikhali kunokwahlukana kwe-catalyst.Kwakhona, ukuba isixa esikhulu se-catalyst particles beza kuhlukaniswa ukusuka kumphezulu we-electrode, oku kuya kukhokelela ekunyuseni okukhulu kokuhlukana kwe-peak (kungekhona kuphela nge-44 mV), ekubeni i-substrate (UCC) ingasebenzi kwi-VO2 +/VO2 + + impendulo ye-redox.
Ukuthelekiswa kwe-CV (a) kunye nokuzinza kwe-redox reaction VO2 +/VO2+ (b) yezinto ezifanelekileyo ze-electrode ngokubhekiselele kwi-CCC.Kwi-electrolyte eyi-0.1 M VOSO4/1 M H2SO4 + 1 M HCl, zonke ii-CV zilingana no-ν = 5 mV/s.
Ukonyusa umtsalane woqoqosho lwetekhnoloji yeVRFB, ukuphucula kunye nokuqonda i-kinetics ye-vanadium redox reaction kubalulekile ekufezekiseni ukusebenza kakuhle kwamandla.Iimbumba ze-HWO-C76 zalungiswa kwaye umphumo wabo we-electrocatalytic kwi-VO2 +/VO2 + reaction wafundwa.I-HWO ibonise ukuphuculwa okuncinci kwekinetic kodwa yacinezela kakhulu ukuvela kweklorini kumxube we-electrolyte ene-acidic.Imilinganiselo eyahlukeneyo ye-HWO: i-C76 isetyenziselwe ukuqhubela phambili i-kinetics yee-electrode ezisekelwe kwi-HWO.Ukwandisa umxholo we-C76 ukuya kwi-HWO kunokuphucula i-electron transfer kinetics ye-VO2 +/VO2 + reaction kwi-electrode eguquliweyo, phakathi kwayo i-HWO-50% C76 iyona nto ingcono kakhulu kuba iyancipha ukunyanzeliswa kokudluliselwa kwentlawulo kwaye igxininise ngakumbi igesi ye-chlorine xa kuthelekiswa C76.kunye ne-TCC ziyakhululwa.Oku kube ngenxa yesiphumo se-synergistic phakathi kwe-C=C sp2 hybridization, i-OH kunye ne-W-OH amaqela asebenzayo.Izinga lokuthotywa kwe-HWO-50% C76 lifunyenwe li-0.29mV / umjikelo phantsi kweebhayisikili ezininzi ngelixa i-UCC kunye ne-TCC ziyi-0.33mV / umjikelezo kunye ne-0.49mV / umjikelo ngokulandelanayo, okwenza ukuba izinzile kakhulu kwi-electrolyte ye-acid exutywe.Iziphumo ezibonisiweyo zichonga ngempumelelo izixhobo ze-electrode eziphezulu ze-VO2 +/VO2+ reaction with kinetics fast and high stability.Oku kuya kwandisa amandla ombane, ngaloo ndlela kuphuculwe ukusebenza kakuhle kwamandla e-VRFB, ngaloo ndlela kuncitshiswe iindleko zorhwebo lwayo lwexesha elizayo.
Iiseti zedatha ezisetyenzisiweyo kunye/okanye ezihlalutyiweyo kuphononongo lwangoku ziyafumaneka kubabhali abachaphazelekayo ngesicelo esinengqiqo.
Luderer G. et al.Uqikelelo lwamandla omoya kunye neSola kwiGlobal Low-Carbon Energy Scenarios: Intshayelelo.EzoQoqosho zamandla.64, 542–551.https://doi.org/10.1016/j.eneco.2017.03.027 (2017).
U-Lee, HJ, Park, S. kunye noKim, H. Uhlalutyo lwempembelelo ye-MnO2 deposition ekusebenzeni kwe-vanadium manganese redox iibhetri zokuhamba.J. Electrochemistry.uluntu.165 (5), A952-A956.https://doi.org/10.1149/2.0881805jes (2018).
I-Shah, i-AA, i-Tangirala, i-R., i-Singh, i-R., i-Wills, i-RGA kunye ne-Walsh, imodeli yeyunithi ye-FK Dynamic yeyunithi yebhetri ye-vanadium redox.J. Electrochemistry.uluntu.158(6), A671.https://doi.org/10.1149/1.3561426 (2011).
I-Gandomi, YA, Aaron, DS, Zawodzinski, TA, kunye ne-Mench, MM Umlinganiselo okhoyo wokusabalalisa kwi-situ kunye nemodeli yokuqinisekisa ibhetri ye-vanadium redox.J. Electrochemistry.uluntu.163 (1), A5188-A5201.https://doi.org/10.1149/2.0211601jes (2016).
I-Tsushima, i-S. kunye ne-Suzuki, i-T. Imodeli kunye nokulinganisa ibhetri ye-vanadium redox kunye ne-interdigitated flux field ukuze kulungiswe isakhiwo se-electrode.J. Electrochemistry.uluntu.167 (2), 020553. https://doi.org/10.1149/1945-7111/ab6dd0 (2020).
Ilanga, B. kunye ne-Skillas-Kazakos, M. Ukuguqulwa kwezinto ze-Graphite Electrode zeSicelo kwiiBattery ze-Vanadium Redox - I. Unyango lokushisa.electrochemistry.Acta 37(7), 1253–1260.https://doi.org/10.1016/0013-4686(92)85064-R (1992).
Liu, T., Li, S., Zhang, H., kunye ne-Chen, J. Ukuqhubela phambili kwizinto ze-electrode zokuphucula ubuninzi bamandla kwiibhetri zokuhamba kwe-vanadium (VFBs).J. I-Energy Chemistry.27(5), 1292–1303.https://doi.org/10.1016/j.jechem.2018.07.003 (2018).
ULiu, uQH et al.Ukusebenza okuphezulu kwe-vanadium redox cell cell kunye nokucwangciswa kwe-electrode ephuculweyo kunye nokukhethwa kwe-membrane.J. Electrochemistry.uluntu.159 (8), A1246-A1252.https://doi.org/10.1149/2.051208jes (2012).
I-Wei, G., Jia, K., Liu, J., kunye neYang, K. Composite carbon nanotube catalyst electrode kunye nekhabhoni yaziva inkxaso yezicelo zebhetri ye-vanadium redox.J. Ukubonelela ngombane.220, 185-192.https://doi.org/10.1016/j.jpowsour.2012.07.081 (2012).
Inyanga, i-S., i-Kwon, i-BV, i-Chang, i-Y., kunye ne-Kwon, i-Y. Impembelelo ye-bismuth sulfate efakwe kwi-CNTs ene-acidified ekusebenzeni kweebhetri ze-vanadium redox.J. Electrochemistry.uluntu.166(12), A2602.https://doi.org/10.1149/2.1181912jes (2019).
Huang, R.-H.yima.Ii-electrode ezisebenzayo zilungiswe ngeplatinam/iinanotubes zekhabhoni ezinodonga ezininzi ze-vanadium redox iibhetri.J. Electrochemistry.uluntu.159(10), A1579.https://doi.org/10.1149/2.003210jes (2012).
Kodwa, S. et al.Ibhetri ye-vanadium redox flow flow isebenzisa i-electrocatalysts ehlotshiswe nge-nitrogen-doped carbon nanotubes ephuma kwi-scaffolds ye-organometallic.J. Electrochemistry.uluntu.165(7), A1388.https://doi.org/10.1149/2.0621807jes (2018).
Khan, P. et al.I-graphene oxide nanosheets njengezinto ezigqwesileyo ze-electrochemically esebenzayo kwi-VO2+/ kunye ne-V2+/V3+ izibini ze-redox ze-vanadium redox iibhetri zokuhamba.Ikhabhoni 49(2), 693–700.https://doi.org/10.1016/j.carbon.2010.10.022 (2011).
Gonzalez, Z. et al.Ukusebenza okugqwesileyo kwe-electrochemical yegraphene-modified graphite ivakala kwiibhetri ze-vanadium redox.J. Ukubonelela ngombane.338, 155-162.https://doi.org/10.1016/j.jpowsour.2016.10.069 (2017).
UGonzález Z., Vizirianu S., Dinescu G., Blanco S. kunye neSantamaria R. Iifilimu zeCarbon nanowwall njengezinto ze-electrode ezenziwe nge-nanostructured kwi-vanadium redox iibhetri zokuhamba.Nano Energy 1(6), 833–839.https://doi.org/10.1016/j.nanoen.2012.07.003 (2012).
I-Opar DO, i-Nankya R., i-Lee J., kunye ne-Yung H. I-graphene-modified mesoporous carbon ye-graphene-ntathu-dimensional ivakalelwe ukusebenza okuphezulu kwe-vanadium redox iibhetri zokuhamba.electrochemistry.Umthetho 330, 135276. https://doi.org/10.1016/j.electacta.2019.135276 (2020).