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Citation: HAN En-Shan, KANG Hong-Xin, DONG Qi, WEI Zi-Hai, YUAN Zhong-Qiang. Electrochemical Performance of sub-Mn Nickel Electrode[J]. Chinese Journal of Applied Chemistry, ;2007, 24(9): 1054-1057. shu

Electrochemical Performance of sub-Mn Nickel Electrode

1.
a Hebei University of Technology, Tianfin 300130;
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b Hebei University of Technology Langfang Department, Langfang

Corresponding author: HAN En-Shan,
Received Date: 26 September 2006
Available Online: 21 December 2006

The coprecipitation method was used to prepare the active material of nickel hydroxide with Mn doped at a certain temperature, pH and stirring rate. XRD and electrochemical methods were applied to analyze the product. The XRD shows that α and β phases co-exist on mixing Mn with nickel ion to prepare the active material. The capability of nickel electrode is greatly improved by doping a certain amount of Mn, and when the molar amount of Mn is 10%, the oxygen evolution potential is increased, the charge potential of nickel electrode is decreased, the discharge potential of nickel electrode is increased, and the specific capacity is 243.21 mA·h/g. Because α nickel hydroxide is partially formed during the process of mixing Mn, the transition amount of electrons per mol nickel hydroxide is increased(approaching to 1). The cycle charge and discharge test results show that doping Mn into the nickel electrode could improve the cycle performance and level off the capacity at the same time.
- nickel electrode,
- nickel hydroxide,
- electrochemical performance,
- specific capacity
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