期刊
CHEMICAL ENGINEERING JOURNAL
卷 328, 期 -, 页码 1-10出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.06.150
关键词
Supercapacitor; Electrode; Ag nanoparticles; La0.7Sr0.3CoO3-delta substrate
资金
- National Science Foundation of China (NSFC) [21276097]
- Special Funds of Guangdong Province Public Research and Ability Construction [2014A010106008]
- Guangdong Innovative, Entrepreneurial Research Team [2014ZT05N200]
- National Science Foundation of China [U1601207]
- Guangdong Province (NSFC-Guangdong) [U1601207]
Supercapacitors have potential for many emerging energy storage applications because of their excellent power density and long cycling stability. However, their applicability is often limited by the relatively low energy density. Here we report our findings in design, fabrication, and testing of a composite electrode composed of Ag nanoparticles grown directly on a porous perovskite-type material La0.7Sr0.3CoO3-delta (LSC) substrate. When tested in KOH aqueous electrolyte, the electrode (with a high mass loading of Ag nanoparticles of 28.6 mg cm(-2)) demonstrates an areal capacity of 14.8 F cm(-2) (specific capacitance of 517.5 F g(-1) and volumetric capacitance of 262.5 F cm(-3)) at 1 mA cm(-2), while maintaining outstanding cycle stability (85.6% retention after 3000 cycles at 50 mA cm(-2)). An asymmetric supercapacitor (Ag/LSC//carboncloth) with a wide voltage of 1.8 V displays a high energy density of 21.9 mWh cm(-3) and an excellent stability. The superior capacitive performance can be ascribed to the porous, conductive and stable LSC framework, the uniform distribution and high mass loading of Ag nanoparticles on LSC, and the effective unitization of redox process. (C) 2017 Published by Elsevier B.V.
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