Fe/V redox flow battery electrolyte investigation and optimization

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• 作者：Bin Li^a ; Liyu Li^b ; Wei Wang^a ; ^{wei.wang@pnnl.gov} ; Zimin Nie^a ; Baowei Chen^a ; Xiaoliang Wei^a ; Qingtao Luo^a ; Zhenguo Yang^b ; Vincent Sprenkle^a
• 关键词：Redox flow battery ; Temperature stability ; Electrolytes ; Membrane ; Separator
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：1 May, 2013
• 年：2013
• 卷：229
• 期：Complete
• 页码：1-5
• 全文大小：565 K

文摘

The recently invented iron (Fe)/vanadium (V) redox flow battery (IVB) system has attracted increasing attention because of its long-term cycling stability and low-cost membrane/separator. In this paper, we describe our extensive matrix study of factors such as electrolyte composition, state of charge (SOC), and temperature that influence the stability of electrolytes in both positive and negative half-cells. During the study, an optimized electrolyte that can be operated in a temperature range from??5?¡ãC to 50?¡ãC without precipitation is identified. Fe/V flow cells using the optimized electrolyte and low-cost separator exhibit satisfactory cycling performance at different temperatures. Efficiencies, capacities, and energy densities of flow batteries at various temperatures are studied.