流动电池
材料科学
钒
电催化剂
电解质
电极
电化学
化学工程
电池(电)
纳米技术
碳纤维
无机化学
复合材料
冶金
复合数
物理
工程类
物理化学
功率(物理)
化学
量子力学
作者
Lantao Wu,Yi Shen,Lihong Yu,Jingyu Xi,Xinping Qiu
出处
期刊:Nano Energy
[Elsevier]
日期:2016-10-01
卷期号:28: 19-28
被引量:194
标识
DOI:10.1016/j.nanoen.2016.08.025
摘要
Fabricating cost effective and high-performance electrodes is essential to the development of vanadium flow battery (VFB). Moreover, improving the stability of electrodes in acidic electrolyte remains key issues. In this work, we describe a simple method to prepare novel electrodes composed of N-doped carbon nanospheres (NCS) grown on graphite felt (GF) fibers. Dopamine monomers are used as both carbon and nitrogen source. Physical and electrochemical results reveal that the as-prepared NCS/GF electrode exhibits excellent electrocatalytic activity as well as wettability for vanadium ion redox reactions. The single cell tests at current densities of 50–300 mA cm−2 demonstrate superior battery performance in terms of energy efficiency and capacity retention. Exceptional durability of the NCS catalyst is confirmed by long-term cycles at a higher current density of 150 mA cm−2. NCS/GF electrode also shows excellent temperature adaptability from −15 °C to 50 °C. The facile approach reported in this study can pave a new route to fabricate high-performance electrodes for VFB.
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