期刊
RSC ADVANCES
卷 5, 期 9, 页码 6886-6891出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra15912h
关键词
-
资金
- National Key Basic Research Program of China [2013CB934104]
- Natural Science Foundation of China [21322311, 21473038, 21071033, 21471034]
- Science and Technology Commission of Shanghai Municipality [14JC1490500]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- Deanship of Scientific Research of King Saud University [1435-010]
The development of lightweight, flexible, electrochemically active materials with high efficiency is important for energy storage and conversion. In this study, we report the fabrication of a freestanding, 3-dimensional graphene/cobalt sulfide nanoflake (3DG/CoSx) composite for supercapacitors and hydrogen evolution catalysts. The graphene framework formed by chemical vapour deposition provides superlight, highly conductive electron transport pathways, as well as abundant pores for electrolyte penetration. The densely patterned cobalt sulfide nanoflake arrays grown by electrodeposition offer a large surface area for electrochemical reactions, high theoretical capacitance and efficient hydrogen evolution catalytic activity. As a proof-of-concept, supercapacitors made of the 3DG/CoSx composites deliver a high specific capacitance of 443 F g(-1) at 1 A g(-1), with excellent capacity retention of 86% after 5000 cycles and mechanical flexibility. In addition, the 3DS/CoSx composites show attractive features as hydrogen evolution catalysts, with a low overpotential of 0.11 V and a Tafel slope of 93 mV dec(-1).
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