A facile method to improve the high rate capability of Co3O4 nanowire array electrodes

被引:167
作者
Cheng, Hua [1 ,2 ]
Lu, Zhou Guang [1 ,2 ]
Deng, Jian Qiu [1 ]
Chung, C. Y. [1 ]
Zhang, Kaili [3 ]
Li, Yang Yang [1 ]
机构
[1] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China
[2] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China
[3] City Univ Hong Kong, Dept Mfg Engn & Engn Management, Hong Kong, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
Cobalt oxide (Co3O4); nanowire arrays; electrode materials; supercapacitors; lithium ion batteries; high rate capability; LITHIUM-ION BATTERIES; ELECTROCHEMICAL CAPACITORS; STORAGE PROPERTIES; PERFORMANCE; NANOPARTICLES; TRANSITION; CONVERSION; BEHAVIORS; ROUTE; ANODE;
D O I
10.1007/s12274-010-0063-z
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
The capability of fast charge and fast discharge is highly desirable for the electrode materials used in supercapacitors and lithium ion batteries. In this article, we report a simple strategy to considerably improve the high rate capability of Co3O4 nanowire array electrodes by uniformly loading Ag nanoparticles onto the surfaces of the Co3O4 nanowires via the silver-mirror reaction. The highly electrically conductive silver nanoparticles function as a network for the facile transport of electrons between the current collectors (Ti substrates) and the Co3O4 active materials. High capacity as well as remarkable rate capability has been achieved through this simple approach. Such novel Co3O4-Ag composite nanowire array electrodes have great potential for practical applications in pseudo-type supercapacitors as well as in lithium ion batteries.
引用
收藏
页码:895 / 901
页数:7
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