CNT-CoO Complex Conductive Agent for the Positive Electrodes of MH/Ni Batteries
CoO was usually added to the positive electrodes of MH/Ni batteries as the conductive agent. In this paper, well crystallized multi-walled carbon nanotubes (CNTs) with diameter about 10 nm were added to the positive electrodes of MH/Ni batteries together with CoO. During the process of transformation from CoO to CoOOH, a complex conductive network was created with CNTs as the frame. Because of the high conductivity and the excellent tension characteristics of CNTs, the charge-transfer capability of the electrode was improved and the integrality of the complex conductive network was enhanced. The electrochemical measurements indicated that the impedance of the electrode with CNT-CoO complex conductive agent was lessened compared to the electrode with simple CoO agent. Performance tests of the sealed batteries showed that the positive electrodes with CNT-CoO complex conductive agent exhibited higher discharge voltage, improved capacity, modified discharge stability and prolonged lifespan, especially at high current rates.
MH/Ni Battery Carbon Nanotube CoO Conductive Agent High-rate Performance
Jianbo WU Yongfeng YUAN Weiping CHEN
College of Physics and Electronic Engineering, Taizhou University, Jiaojiang 318000, China College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China
国际会议
重庆
英文
488-491
2008-06-09（万方平台首次上网日期，不代表论文的发表时间）