期刊
ELECTROCHIMICA ACTA
卷 237, 期 -, 页码 102-108出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.03.177
关键词
Activated carbon layer; thickness; graphene; rate performance; supercapacitor
资金
- Natural Science Foundation of China [51504171, 51572100]
- Project of Hubei Provincial Education Office [B2015346]
- Outstanding Young and Middle-aged Scientific Innovation Team of Colleges and Universities of Hubei Province [T201402]
- Applied Basic Research Program of Wuhan City [2013011801010598]
- Project of Natural Science Foundation of Hubei Province [2015CFA116]
Carbon-based nanostructures have drawn special attention for use in supercapacitive applications due to their high specific surface area and stability. Balancing the conflict between activity and the conductivity of carbon based electrode materials would contribute to comprehensive energy storage performance for practical application. In this work, an activated carbon layer covered graphene (ACG) with adjustable thickness has been fabricated by hydrothermal treatment of graphene oxide with glucose and further activation with a KOH agent. The electrochemical performance of ACG is related to the thickness of the active layer on the surface of the ACG. The ACG with a suitable thickness of 1-2 nm exhibits a high specific capacitance of 248.4 F g(-1) at 1 A g(-1) and perfect rate performance with a high capacitance of 187.5 F g(-1) at a large current density of 100 A g(-1) owing to both high activity and conductivity. Particularly, the synergetic effect of the active porous carbon and conductive graphene results in considerable energy properties of the ACG based symmetric devices. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据