期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 36, 页码 18505-18513出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta05129k
关键词
-
资金
- PAPD [50831004]
- Fundamental Research Funds for the Central Universities
- Innovation Fund of Jiangsu Province [BY2013072-06]
- Natural Science Foundation of Jiangsu Province [2012729]
- National Natural Science Foundation of China [11374136]
- State Key Program for Basic Research of China [2010CB631004]
In order to achieve high energy densities, an asymmetric all-solid-state supercapacitor is developed by synthesizing a novel composite of cobalt carbonate hydroxide (CCH) nanowire covered N-doped graphene (NG) as positive and porous NG as negative electrodes. The CCH-NG composite is obtained from a one-step hydrothermal method, where optimization of the CCH content triples the specific capacitance of porous NG, reaching 1690 F g(-1) at 1.0 A g(-1). The optimal composite exhibits a remarkable cycling stability retaining 94.2% of the initial capacitance after 10 000 cycles, and good rate capability (still 1358 F g(-1) at 10 A g(-1)). The assembled asymmetric supercapacitor based on the optimal composite has a high discharge areal capacitance of 153.5 mF cm(-2) (at 1.0 mA cm(-2), can cycle reversibly in the high-voltage region of 0-1.9 V, and thus provide superior energy and power densities (0.77 W h m(-2) and 25.3 W m(-2)).
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