【摘 要】
：
Vanadium flow battery (VFB) is a fast going and promising system for large-scale stationary energy storage,However,drawbacks such as low power density and narrow temperature window caused by poor catalytic activity of graphite felt (GF) electrodes limit i
【机 构】
：
The State Key Laboratory of Refractories and Metallurgy, School of Chemistry and Chemical Engineerin
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Vanadium flow battery (VFB) is a fast going and promising system for large-scale stationary energy storage,However,drawbacks such as low power density and narrow temperature window caused by poor catalytic activity of graphite felt (GF) electrodes limit its worldwide application.In this paper,bismuth,as a low-cost,no-toxic and high-activity electrocatalyst,is used to modify the thermal activated GF (TGF)via a facile hydrothermal method.Bismuth can effectively inhibit the side reaction of hydrogen evolution in wide temperature range,while promoting the V2+/V3+ redox reaction.As a result,the VFB assembled with Bi/TGF as negative electrode demonstrates outstanding rate performance under the current density up to 400mA cm-2,as well as a long-term stability over 600 charging/discharging cycles at a high current density of 150mA cm-2.Moreover,it also shows excellent temperature adaptability from-10 ℃ to 50 ℃ and high durability for life test at the temperature of 50 ℃.
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