期刊
JOURNAL OF POWER SOURCES
卷 436, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2019.226862
关键词
Biomimetic; CoS2; Heteroatom-doped carbon; Oxygen evolution reaction; Supercapacitor
资金
- National Natural Science Foundation of China [21576071, 21776061]
- Foundation of Henan Educational Committee [17A150023]
Development of efficient and durable electrocatalysts and electrode materials are significantly important to enhance the electrochemical performance for oxygen evolution reaction and supercapacitor applications. Herein, we design a hydrothermal-assisted biomimetic strategy to anchor CoS2 nanodots on heteroatom-doped carbon layer (CoS2@HADC). Numerous CoS2 nanodots and heteroatoms rich in N and S are in situ hybridized into the carbon layer in a homogeneously dispersed manner. The preparation procedure is quite simple and moderate, avoiding the high-temperature annealing step. The optimized hybrid not only act as effective electrocatalyst, in which overpotential of 226 my is enough to drive a current density of 10 mA cm(-2) with a Tafel slope of 56 mV Dec(-1) during the OER process, but also serve as electrode material with specific capacitance of 565 F g(-1) at a current density of 1 A g(-1) for high-performance supercapacitor, compared with CoS2 (176 F g(-1)). Also, it exhibits superior cycling activity (similar to 100% capability retention after 10000 cycles at 2 A g(-1) in 6.0 M KOH) and remains a 57% high rate capability (320 F g(-1) at 5 A g(-1)). The rational design concept for cobalt sulfides/heteroatomdoped carbon hybrid provide a simple strategy towards superior energy conversion and storage devices.
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