Novel Three-dimensional Hierarchical Flower-like NiO-Co3O4 Composites as High-performance Electrode Materials for Supercapacitors

被引：0

作者：

Liu, Peipei ^{[1
]}

Hu, Zhonghua ^{[1
]}

Liu, Yafei ^{[1
]}

Yao, Mingming ^{[1
]}

Zhang, Qiang ^{[1
]}

Xu, Zijie ^{[1
]}

机构：

[1] Tongji Univ, Dept Chem, Shanghai 200092, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2014年 / 9卷 / 12期

关键词：

supercapacitors; NiO-Co3O4; composites; electrode materials; hierarchical flower-like; L-lysine; FACILE SYNTHESIS; NI FOAM; CO3O4; MICROSPHERES; NANOSHEETS; CAPACITANCE; NANOWIRES; NICO2O4; MWCNTS; HYBRID;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In the present work, novel three-dimensional (3D) hierarchical NiO-Co3O4 composites are prepared by a facile and template-free hydrothermal method with L-lysine as the chelating agent. The flower-like NiO-Co3O4 composites display a high specific surface area and desirable pore distribution. The electrochemical performances are investigated by cyclic voltammetry, galvanostatic charge-discharge, and cycle life. The results reveal that the novel NiO-Co3O4 composites exhibit a high specific capacitance of 1988.6 F g(-1) at 1 A g(-1) and 1491.4 F g(-1) at 15 A g(-1). Furthermore, the composites show an excellent cycling performance and stability with capacity retention of 94.0 % after 1500 cycles at 10 A g(-1). The outstanding capacitive behaviors are ascribed to the desirable composition and the unique 3D hierarchical flower-like structure.

引用

页码：7986 / 7996

页数：11