Supercapacitor Devices Based on Graphene Materials
Supercapacitor Devices Based on Graphene Materials
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DOI：
10.1021/jp902214f
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发表时间：
2009-07-30
影响因子：
3.7
通讯作者：
Chen, Yongsheng
中科院分区：
文献类型：
--
作者：
Wang, Yan;Shi, Zhiqiang;Chen, Yongsheng
石墨烯材料作为超级电容器电极材料进行了研究。GM由氧化石墨烯片制备，随后经历基于气体的肼还原以恢复导电碳网络。在电解质水溶液中，在能量密度为28.5 Wh/kg时，测得的功率密度为10 kW/kg，最大比电容为205 F/g。同时，超级电容器装置表现出优异的长循环寿命沿着，在1200次循环测试后保持了近似90%的比电容。这些显著的结果表明，基于这种新型2D石墨烯材料的高性能、环保和低成本电能存储设备具有令人兴奋的商业潜力。
Graphene materials (GMs) as supercapacitor electrode materials have been investigated. GMs are prepared from graphene oxide sheets, and subsequently suffer a gas-based hydrazine reduction to restore the conducting carbon network. A maximum specific capacitance of 205 F/g with a measured power density of 10 kW/kg at energy density of 28.5 Wh/kg in an aqueous electrolyte solution has been obtained. Meanwhile, the supercapacitor devices exhibit excellent long cycle life along with similar to 90% specific capacitance retained after 1200 cycle tests. These remarkable results demonstrate the exciting commercial potential for high performance, environmentally friendly and low-cost electrical energy storage devices based on this new 2D graphene material.