Vanadium Redox Flow Battery
MABHIRI ESEKORI – FLOW SYSTEMS Overview
kubva kuMJ Watt-Smith, … FC Walsh, muEncyclopedia yeElectrochemical Power Sources
Vanadium -vanadium redox flow battery (VRB)rakapayona zvikuru naM. Skyllas-Kazacos uye vaaishanda navo muna 1983 paYunivhesiti yeNew South Wales, Australia. Michina iyi yava kuvandudzwa nemasangano akati wandei anosanganisira E-Fuel Technology Ltd yekuUnited Kingdom neVRB Power Systems Inc. yekuCanada. Chimwe chinhu cheVRB ndechekuti inoshandisa chinhu chimwe chemakemikari mune ese ari mavirianode uye cathode electrolytes. Iyo VRB inoshandisa ina oxidation nyika dzevanadium, uye zvine hungwaru kune imwechete redox vaviri vanadium muhafu-sero imwe neimwe. V (II) - (III) uye V (IV) - (V) vakaroorana vanoshandiswa mune zvakaipa uye zvakanaka hafu-masero, maererano. Kazhinji, iyo inotsigira electrolyte inonzi sulfuric acid (∼2-4 mol dm-3) uye vanadium concentration iri muhuwandu hwe1-2 mol dm-3.
Kuchaja-kuburitsa maitiro muVRB kunoratidzwa mumabatiro [I]–[III]. Panguva yekushanda, iyo yakavhurika-circuit voltage inowanzoita 1.4 V pa50% yenyika-ye-charge uye 1.6 V pa100% yenyika-ye-charge. Maelectrodes anoshandiswa muVRBs anowanzocarbon feltskana mamwe maporous, matatu-dimensional mafomu ecarbon. Mabhatiri emagetsi mashoma akashandisa kabhoni-polymer composite electrodes.
Kubatsira kukuru kweVRB ndeyekuti kushandiswa kwechinhu chimwe chete muhafu-sero kunobatsira kudzivirira matambudziko ane chekuita nekusvibiswa kwepakati-yemagetsi maviri ehafu-cell panguva yekushandiswa kwenguva refu. Iyo electrolyte ine hupenyu hurefu uye nyaya dzekurasa tsvina dzinoderedzwa. Iyo VRB inopawo simba rakawanda rekushandisa (<90% mukuisa kwakakura), mutengo wakaderera wekugona kukuru kwekuchengetedza, kukwidziridzwa kwehurongwa huripo, uye hupenyu hurefu hwekutenderera. Zvinogoneka zvinokanganisa zvinosanganisira mari yakakwira mari yevanadium-based electrolytes pamwe chete nemutengo uye hushoma hwehupenyu hweiyo ion-exchange membrane.
Nguva yekutumira: May-31-2021