Investigations of High Voltage Vanadium-Metal Hydride Flow Battery toward kWh Scale Storage with 100 cm2 Electrodes. Issue 1 (18th November 2015)

• Record Type: Journal Article
• Authors: Weng, Guo-Ming; Li, Chi-Ying Vanessa; Chan, Kwong-Yu; Lee, Cheuk-Wing; Zhong, Jin
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 1(2016)
• Page Start: A5180
• Page End: A5187
• Publication Date: 2015-11-18
• Subjects: bipolar membrane -- Metal hydride battery -- pH differential power sources -- Vanadium redox flow battery; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0271601jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Recently reported vanadium-metal hydride redox couple exploits the pH difference between the negative and positive electrodes to obtain a high cell voltage of 2.0 V in aqueous environment. The metal hydride replaces the negative electrode of an all vanadium redox flow battery and eliminates limitations arise from the V 2+ /V 3+ redox species. We report further improvements of this new redox couple with achievements of increased current density, operation of larger 100 cm 2 electrodes, and the operation of 10 large cells in series. Preliminary data using a fluctuating simulated power input tested the viability toward kWh scale storage.