期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 40, 期 32, 页码 10176-10184出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2015.06.060
关键词
Self-supporting graphene; Electrochemical re-intercalation; MnO2; Supercapacitor
资金
- National Natural Science Foundation of China [51272226]
- Natural Science Foundation of Hebei Province, China [E2012203112]
- Key Basic Research Program of Hebei Province of China [14961106D]
A self-supporting graphene (SSG) was prepared by electrochemical re-intercalation of a flexible graphite sheet (FGS) in the (NH4)(2)S2O8 electrolyte. The in-situ grown SSG rooted in the unexpanded FGS substrate which acted as a current collector. A thin, homogeneous and conformal MnO2 layer was coated on the surface of SSG by microwave-assisted deposition. The obtained FGS-SSG/MnO2 electrode displayed the areal and specific capacitances as high as 2.8 F cm(-2) and 465 F g(-1) at 2 mV s. An asymmetric supercapacitor of FGS-SSG/MnO21/FGS-SSG was assembled, which exhibited a maximum energy density of 25.6 Wh kg(-1) at a power density of 1000W kg(-1). In addition, the capacitance retention ratio of FGS-SSG/MnO2//FGS-SSG reached 87% at the current density of 1 A g(-1) after 5000 charge discharge cycles. High electrochemical properties indicate that the FGS-SSG/MnO2 is a promising electrode for supercapacitors. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by 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