Ibhethri Lokugeleza Kwe-Vanadium Redox
AMABHETRI ESIBILI – IZINHLELO ZOKUGQIBELA ISIFINYEZO
kusukela ku-MJ Watt-Smith, ... FC Walsh, ku-Encyclopedia of Electrochemical Power Sources
I-vanadium -ibhethri lokugeleza kwe-vanadium redox (VRB)yasungulwa kakhulu ngu-M. Skyllas-Kazacos kanye nozakwabo ngo-1983 eNyuvesi yaseNew South Wales, e-Australia. Ubuchwepheshe manje sebuthuthukiswa yizinhlangano eziningana okubalwa kuzo i-E-Fuel Technology Ltd e-United Kingdom kanye ne-VRB Power Systems Inc. eCanada. Isici esithile se-VRB ukuthi isebenzisa isakhi samakhemikhali esifanayo kuzo zombili izifundazwe.i-anode kanye nama-electrolyte e-cathodeI-VRB isebenzisa izimo ezine ze-oxidation ze-vanadium, futhi ngokufanelekile kukhona umbhangqwana owodwa we-redox we-vanadium kuseli ngalinye eliyisigamu. Umbhangqwana we-V(II)–(III) kanye ne-V(IV)–(V) usetshenziswa kumaseli angesigamu angesigamu angesigamu, ngokulandelana. Ngokuvamile, i-electrolyte esekelayo yi-sulfuric acid (∼2–4 mol dm−3) kanti ukuhlushwa kwe-vanadium kuphakathi kuka-1–2 mol dm−3.
Ukusabela kokushaja-ukukhipha amandla ku-VRB kuboniswa ku-reactions [I]–[III]. Ngesikhathi sokusebenza, i-voltage ye-open-circuit ngokuvamile i-1.4 V ku-50% state-of-charge kanye ne-1.6 V ku-100% state-of-charge. Ama-electrode asetshenziswa kuma-VRB ngokuvamile abizwa ngokuthiama-felt e-carbonnoma ezinye izinhlobo zekhabhoni ezinezimbobo, ezinobukhulu obuthathu. Amabhethri anamandla aphansi asebenzise ama-electrode ahlanganisiwe ekhabhoni-polymer.
Inzuzo enkulu ye-VRB ukuthi ukusetshenziswa kwento efanayo kuzo zombili izingxenye zamaseli kusiza ukugwema izinkinga ezihambisana nokungcoliswa kwama-electrolyte amabili ayingxenye yamaseli ngesikhathi sokusetshenziswa isikhathi eside. I-electrolyte ihlala isikhathi eside futhi izinkinga zokulahla imfucuza ziyancishiswa. I-VRB iphinde inikeze ukusebenza kahle kwamandla aphezulu (<90% ekufakweni okukhulu), izindleko eziphansi zamakhono amakhulu okugcina, ukuthuthukiswa kwezinhlelo ezikhona, kanye nokuphila komjikelezo omude. Imikhawulo engaba khona ifaka phakathi izindleko ezinkulu zemali yama-electrolyte asekelwe ku-vanadium kanye nezindleko kanye nokuphila okulinganiselwe kwe-membrane yokushintshana kwe-ion.
Isikhathi sokuthunyelwe: Meyi-31-2021