Pūhiko Rere Vanadium Redox - NGĀ PŪHIKO TUARUA – NGĀ PŪNAHA RERE | Tirohanga Whānui

Pūhiko Rere Vanadium Redox

NGĀ PŪTAKI TUARUA – Tirohanga Whānui mō ngā PŪNAHA RERE

nā MJ Watt-Smith, … FC Walsh, i roto i te Encyclopedia of Electrochemical Power Sources

Te vanadium–pākahiko rere vanadium redox (VRB)i tīmatahia e M. Skyllas-Kazacos mā i te tau 1983 i Te Whare Wānanga o New South Wales, Ahitereiria. Kei te whakawhanakehia te hangarau e ētahi whakahaere tae atu ki a E-Fuel Technology Ltd i te United Kingdom me VRB Power Systems Inc. i Kanata. Ko tētahi āhuatanga motuhake o te VRB ko te whakamahi i te huānga matū kotahi i roto i ngā mea e rua.ngā electrolytes o te anode me te cathode. Ka whakamahia e te VRB ngā āhua waikura e whā o te vanadium, ā, ko te mea pai kia kotahi te takirua redox o te vanadium i roto i ia haurua-pūtau. Ka whakamahia ngā takirua V(II)–(III) me V(IV)–(V) i roto i ngā haurua-pūtau kino me ngā haurua-pūtau pai. I te nuinga o te wā, ko te electrolyte tautoko he waikawa whanariki (∼2–4 mol dm−3) ā, ko te kukū o te vanadium kei roto i te awhe o te 1–2 mol dm−3.

Ko ngā tauhohenga utu-tuku i roto i te VRB e whakaaturia ana i roto i ngā tauhohenga [I]–[III]. I te wā e mahi ana, ko te ngaohiko ara iahiko tuwhera he 1.4 V i te 50% o te āhua utu me te 1.6 V i te 100% o te āhua utu. Ko ngā irahiko e whakamahia ana i roto i ngā VRB hengā whatu waroētahi atu momo waro porous, toru-ahu rānei. Ko ngā pākahiko iti te mana kua whakamahi i ngā irahiko hiato waro-polymer.

Ko tētahi painga nui o te VRB ko te whakamahinga o te huānga kotahi i roto i ngā haurua-pūtau e rua ka āwhina i te karo i ngā raruraru e pā ana ki te whakawhiti-paru o ngā irahiko haurua-pūtau e rua i te wā roa o te whakamahinga. He roa te ora o te irahiko, ā, ka whakaitihia ngā take whakakore para. He nui hoki te whai huatanga o te pūngao o te VRB (<90% i roto i ngā whakaurunga nui), he iti te utu mō ngā kaha rokiroki nui, he taea te whakapai ake i ngā pūnaha o nāianei, me te roa o te ora huringa. Ko ētahi herenga pea ko te utu whakapaipai teitei o ngā irahiko vanadium me te utu me te iti o te ora o te kiriuhi whakawhiti-katote.