Effect of Multi-Wall Carbon Nanotubes on the Electrochemical Performance of Al/Ca Codoped α-Nickel Hydroxide

Abstract

The effect of multi-wall carbon nanotubes (MCNTs) addition on the electrochemical performance of Al/Ca codoped α-nickel hydroxide is studied. The microstructure and electrochemical performance of the prepared samples are characterized by XRD, SEM, electrochemical impedance spectroscopy, cyclic voltammetry, and charge-discharge tests. The results show that the addition of MCNTs could decrease the electrochemical reaction impedance dramatically, improve the electrochemical reaction reversibility, and increase the specific discharge capacity.

Keywords:

• Nickel hydroxide
• Al/Ca codoping
• multi-wall carbon nanotubes; electrochemical performance

Acknowledgments

We gratefully acknowledge the financial supports of National Natural Science Foundation of China (No. 20563001) and Guangxi Science Research and Technology Developing Foundation of China (No. 073101, No. 0842003-12/15)