流动电池
杂原子
材料科学
电池(电)
碳化
碳纤维
溴
化学工程
锌
储能
法拉第效率
电极
电化学
无机化学
氮气
电导率
兴奋剂
化学
有机化学
复合材料
冶金
烷基
光电子学
扫描电子显微镜
复合数
功率(物理)
物理
物理化学
量子力学
工程类
电解质
作者
Hong‐Xin Xiang,Aidong Tan,Jinhua Piao,Zhiyong Fu,Zhenxing Liang
出处
期刊:Small
[Wiley]
日期:2019-05-06
卷期号:15 (24)
被引量:89
标识
DOI:10.1002/smll.201901848
摘要
Abstract The zinc–bromine flow battery (ZBFB) is one of the most promising technologies for large‐scale energy storage. Here, nitrogen‐doped carbon is synthesized and investigated as the positive electrode material in ZBFBs. The synthesis includes the carbonization of the glucose precursor and nitrogen doping by etching in ammonia gas. Physicochemical characterizations reveal that the resultant carbon exhibits high electronic conductivity, large specific surface area, and abundant heteroatom‐containing functional groups, which benefit the formation and exposure of the active sites toward the Br 2 /Br − redox couple. As a result, the assembled ZBFB achieves a voltage efficiency of 83.0% and an energy efficiency of 82.5% at a current density of 80 mA cm −2 , which are among the top values in literature. Finally, the ZBFB does not yield any detectable degradation in performance after a 200‐cycle charging/discharging test, revealing its high stability. In summary, this work provides a highly efficient electrode material for the zinc–bromine flow battery.
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