期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 31, 页码 12519-12525出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta02055c
关键词
-
资金
- NSFC [21273118]
- MOE Innovation Team in China [IRT13022]
Manganese monoxide (MnO) holds great potential for high-performance supercapacitors; however, it is highly desirable to establish a feasible structure to address common concerns of MnO materials. Herein, we have inserted ultrasmall MnO nanoparticles into N-rich carbon nanosheets (MnO@NCs) via a facile and scalable method. By integrating copious nitrogen species (over 13 wt%), flexible but robust carbon nanosheets offer powerful support for dispersing large amounts of MnO nanoparticles, creatively avoiding the inherent deficiencies of MnO such as poor electrical conductivity, low mechanical stability and severe electrochemical dissolution. Consequently, the MnO@NC electrode exhibited a striking capacitance of 570 F g(-1) at 2 A g(-1) within a wide operation voltage of 1 V, which spurs the low capacitance of MnO materials (generally 200-350 F g(-1)) to a higher level. Furthermore, initial attempts at fabricating asymmetric supercapacitors based on MnO@NCs demonstrated an energy density superior to its well-studied MnO2 counterpart. The introduction of N-rich species is of great significance for releasing restricted properties and fully exerting positive effects on the supercapacitors. Particularly, the impressive capacitance retention of similar to 99% over 6000 cycles also propels a new direction for transition metal oxide/NC composites towards high-performance energy 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