Anadium Redox Flow Battery
MABATIRE ACHIWIRI - ZINTHU ZOYENERA ZINTHU Mwachidule
kuchokera kwa MJ Watt-Smith, ... FC Walsh, mu Encyclopedia of Electrochemical Power Sources
Vanadium -vanadium redox flow batri (VRB)anachita upainiya makamaka ndi M. Skyllas-Kazacos ndi antchito anzake mu 1983 pa yunivesite ya New South Wales, Australia. Ukadaulowu tsopano ukupangidwa ndi mabungwe angapo kuphatikiza E-Fuel Technology Ltd ku United Kingdom ndi VRB Power Systems Inc. ku Canada. Mbali ina ya VRB ndi yakuti imagwiritsa ntchito mankhwala omwewo m'magulu onse awirianode ndi cathode electrolyte. VRB imagwiritsa ntchito madera anayi oxidation a vanadium, ndipo kwenikweni pali ma redox angapo a vanadium mu theka lililonse. Mabanja a V (II)–(III) ndi V(IV)–(V) amagwiritsidwa ntchito mu ma cell omwe alibe ndi abwino, motsatana. Kawirikawiri, electrolyte yothandizira ndi sulfuric acid (∼2-4 mol dm-3) ndipo ndende ya vanadium imakhala mumtundu wa 1-2 mol dm-3.
Zochita zacharge-discharge mu VRB zikuwonetsedwa muzochita [I]–[III]. Panthawi yogwira ntchito, magetsi otseguka nthawi zambiri amakhala 1.4 V pa 50% boma-of-charge ndi 1.6 V pa 100% boma-la-charge. Ma electrode omwe amagwiritsidwa ntchito mu VRBs nthawi zambiri amakhalampweya wa carbonkapena ma porous, atatu-dimensional mitundu ya carbon. Mabatire otsika mphamvu amagwiritsa ntchito ma elekitirodi a carbon-polymer composite.
Ubwino waukulu wa VRB ndikuti kugwiritsa ntchito chinthu chomwecho m'maselo onse a theka kumathandiza kupewa mavuto okhudzana ndi kuipitsidwa kwa ma electrolyte awiri a theka la cell pakugwiritsa ntchito nthawi yayitali. Electrolyte imakhala ndi moyo wautali ndipo nkhani zotaya zinyalala zimachepetsedwa. VRB imaperekanso mphamvu zowonjezera mphamvu (<90% muzitsulo zazikulu), mtengo wotsika wa mphamvu zazikulu zosungirako, kukweza kwa machitidwe omwe alipo, ndi moyo wautali wautali. Zolepheretsa zomwe zingatheke zikuphatikizapo mtengo wokwera kwambiri wa ma electrolyte opangidwa ndi vanadium pamodzi ndi mtengo ndi nthawi yochepa ya moyo wa ion-exchange membrane.
Nthawi yotumiza: May-31-2021