Pākahi Vanadium Redox Flow
NĀ PĀKĀ LUA - ʻŌNAE KALELE
mai MJ Watt-Smith, … FC Walsh, ma ka Encyclopedia of Electrochemical Power Sources
ʻO ka vanadium–pākahiko kahe vanadium redox (VRB)ua hoʻomaka nui ʻia e M. Skyllas-Kazacos a me nā hoa hana i ka makahiki 1983 ma ke Kulanui o New South Wales, Australia. Ke hoʻomohala ʻia nei ka ʻenehana e kekahi mau hui e like me E-Fuel Technology Ltd ma United Kingdom a me VRB Power Systems Inc. ma Kanada. ʻO kahi hiʻohiʻona kūikawā o ka VRB ʻo ia ka hoʻohana ʻana i ka mea kemika like ma nā ʻeluaka anode a me nā electrolytes cathodeHoʻohana ka VRB i nā ʻano oxidation ʻehā o ka vanadium, a ʻo ke kūpono he hoʻokahi redox couple o ka vanadium i kēlā me kēia hapalua-cell. Hoʻohana ʻia nā V(II)–(III) a me V(IV)–(V) couples i nā hapalua-cell maikaʻi ʻole a me maikaʻi. ʻO ka maʻamau, ʻo ka electrolyte kākoʻo he sulfuric acid (∼2–4 mol dm−3) a ʻo ka nui o ka vanadium ma ka pae o 1–2 mol dm−3.
Hōʻike ʻia nā hopena hoʻouka-hoʻokuʻu i loko o ka VRB i nā hopena [I]–[III]. I ka wā o ka hana, ʻo ka volta kaapuni hāmama he 1.4 V ma 50% state-of-charge a me 1.6 V ma 100% state-of-charge. ʻO nā electrodes i hoʻohana ʻia i loko o nā VRB henā ʻūpā kalaponaa i ʻole nā ʻano porous ʻekolu-dimensional o ke kalapona. Ua hoʻohana nā pila o ka mana haʻahaʻa i nā electrodes composite carbon-polymer.
ʻO kahi pōmaikaʻi nui o ka VRB, ʻo ia ka hoʻohana ʻana i ka mea like ma nā hapalua cell ʻelua e kōkua i ka pale ʻana i nā pilikia e pili ana i ka haumia keʻa o nā electrolytes hapalua cell ʻelua i ka wā hoʻohana lōʻihi. He lōʻihi ke ola o ka electrolyte a ua hoʻemi ʻia nā pilikia hoʻolei ʻōpala. Hāʻawi pū ka VRB i ka pono ikehu kiʻekiʻe (<90% ma nā hoʻonohonoho nui), ke kumukūʻai haʻahaʻa no nā hiki ke mālama nui, ka hiki ke hoʻonui ʻia o nā ʻōnaehana e kū nei, a me ke ola pōʻaiapuni lōʻihi. ʻO nā palena hiki ke komo pū me ke kumukūʻai kapikala kiʻekiʻe o nā electrolytes vanadium me ke kumukūʻai a me ke ola palena o ka membrane ion-exchange.
Ka manawa hoʻouna: Mei-31-2021