CNT-CoO Complex Conductive Agent for the Positive Electrodes of MH/Ni Batteries

Abstract:

Article Preview

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.

Info:

Periodical:

Materials Science Forum (Volumes 610-613)

Main Theme:

Edited by:

Zhong Wei Gu, Yafang Han, Fu Sheng Pan, Xitao Wang, Duan Weng and Shaoxiong Zhou

Pages:

488-491

DOI:

10.4028/www.scientific.net/MSF.610-613.488

Citation:

J. B. Wu et al., "CNT-CoO Complex Conductive Agent for the Positive Electrodes of MH/Ni Batteries", Materials Science Forum, Vols. 610-613, pp. 488-491, 2009

Online since:

January 2009

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.