Vanadium Redox Flow Roj Teeb
COV ROJ TEEB THIB OB - TXHEEJ TXHEEM TXOG KEV PAUV
los ntawm MJ Watt-Smith, … FC Walsh, hauv Encyclopedia of Electrochemical Power Sources
Cov tshuaj vanadium -roj teeb vanadium redox flow (VRB)tau raug tsim los ntawm M. Skyllas-Kazacos thiab cov neeg ua haujlwm hauv xyoo 1983 ntawm University of New South Wales, Australia. Cov thev naus laus zis tam sim no tau tsim los ntawm ntau lub koom haum suav nrog E-Fuel Technology Ltd hauv United Kingdom thiab VRB Power Systems Inc. hauv Canada. Ib qho tshwj xeeb ntawm VRB yog tias nws siv tib lub tshuaj lom neeg hauv ob qho tib siCov electrolytes ntawm anode thiab cathode. Lub VRB siv plaub lub xeev oxidation ntawm vanadium, thiab qhov zoo tshaj plaws yog muaj ib khub redox ntawm vanadium hauv txhua lub cell ib nrab. Cov khub V(II)–(III) thiab V(IV)–(V) yog siv rau hauv cov cell ib nrab tsis zoo thiab zoo, raws li. Feem ntau, cov electrolyte txhawb nqa yog sulfuric acid (~2–4 mol dm−3) thiab qhov concentration ntawm vanadium yog nyob rau hauv qhov ntau ntawm 1–2 mol dm−3.
Cov kev hloov pauv them-tso tawm hauv VRB tau qhia hauv cov kev hloov pauv [I]-[III]. Thaum lub sijhawm ua haujlwm, qhov hluav taws xob qhib-circuit feem ntau yog 1.4 V ntawm 50% lub xeev-ntawm-them thiab 1.6 V ntawm 100% lub xeev-ntawm-them. Cov electrodes siv hauv VRBs feem ntau yogcov pa roj carbonlossis lwm yam porous, peb-seem ntawm cov pa roj carbon. Cov roj teeb ntawm lub zog qis dua tau siv cov electrodes carbon-polymer composite.
Ib qho txiaj ntsig loj ntawm VRB yog tias kev siv tib lub ntsiab lus hauv ob lub hlwb ib nrab pab kom tsis txhob muaj teeb meem cuam tshuam nrog kev sib kis ntawm ob lub hlwb ib nrab thaum siv ntev. Lub electrolyte muaj lub neej ntev thiab cov teeb meem pov tseg pov tseg raug txo kom tsawg. VRB kuj muaj kev siv hluav taws xob zoo (<90% hauv kev teeb tsa loj), tus nqi qis rau cov peev xwm khaws cia loj, kev hloov kho tshiab ntawm cov kab ke uas twb muaj lawm, thiab lub neej ntev. Tej zaum yuav muaj kev txwv suav nrog tus nqi peev txheej siab ntawm vanadium-based electrolytes ua ke nrog tus nqi thiab lub neej txwv ntawm daim nyias nyias pauv ion.
Lub sijhawm tshaj tawm: Tsib Hlis-31-2021