Carbon-nanoparticles encapsulated in hollow nickel oxides for supercapacitor application

被引:165
作者
Fan, Lei [1 ]
Tang, Le [1 ]
Gong, Huifang [1 ]
Yao, Zhiheng [1 ]
Guo, Rong [1 ]
机构
[1] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Peoples R China
关键词
GRAPHENE; ARRAYS; NANOCOMPOSITES; PERFORMANCE; CAPACITANCE; COMPOSITE; NIO;
D O I
10.1039/c2jm32241b
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Monodisperse carbon nanoparticles encapsulated in hollow NiO nanostructures (C@NiO) have been successfully synthesized by calcination from a Ni(OH)(2) covered carbon (C@Ni(OH)(2)) precursor. The as-prepared products at each stage were extensively characterized and carefully discussed. The electrochemical properties of the carbon encapsulated in hollow NiO nanostructures were investigated using cycling voltammetry and charge-discharge techniques. The specific capacitance of the obtained C@NiO electrode was about 988.7 F g(-1) at a current density of 0.5 A g(-1). It shows better performance than hollow NiO spheres obtained in oxygen atmosphere. Furthermore, the C@NiO electrode shows a good capacitive retention of ca. 90.7% after 1000 charge-discharge cycles.
引用
收藏
页码:16376 / 16381
页数:6
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