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Citation: YANG Zhiyu, HU Meng, JI Xiaodan, LEI Lixu. The Charge and Discharge Properties and the Optimum Formulation of a Positive Electrode of Nickel Metal Hydride Batteries[J]. Chinese Journal of Applied Chemistry, ;2011, 28(11): 1323-1330. doi: 10.3724/SP.J.1095.2011.00694 shu

The Charge and Discharge Properties and the Optimum Formulation of a Positive Electrode of Nickel Metal Hydride Batteries

1.
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189

Corresponding author: LEI Lixu,
Received Date: 22 November 2010
Available Online: 28 January 2011
Fund Project: 江苏省"六大人才高峰"行动计划(2007004)资助项目 (2007004)

Two layered double hydroxides,[Ni₄Al(OH)₁₀]OH and [Co₄Al(OH)₁₀]NO₃, were synthesized by chemical co-precipitation. The former was used as the active material and the latter as well as graphite were used as the conductive additives, respectively. The optimum ratio of the three materials in a positive electrode was estimated through the simplex-centroid design to improve the charge/discharge properties efficiently at a high current density. When the mass fractions of [Ni₄Al(OH)₁₀]OH,[Co₄Al(OH)₁₀]NO₃ and graphite are 64.45%, 12.27% and 23.28%, respectively, the discharge capacity can retain 270.5 mA·h/g(88.7% of the maximum) after 200 cycles at a current density of 800 mA/g.
- [Ni₄Al(OH)₁₀]OH,
- [Ni₄Al(OH)₁₀]NO₃,
- simplex-centroid design,
- charge and discharge at high current density
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