| Effect of Lu2O3 on Charge/discharge Performances of Spherical Nickel Hydroxide at High Temperature |
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| 引用本文： | 任俊霞 王小建 李宇展 高学平 阎杰. Effect of Lu2O3 on Charge/discharge Performances of Spherical Nickel Hydroxide at High Temperature[J]. 中国稀土学报(英文版), 2005, 23(6): 732-736 |
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| 作者姓名： | 任俊霞 王小建 李宇展 高学平 阎杰 |
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| 作者单位： | Institute of New Energy Material Chemistry, Nankai University, Tianfin 300071, China） |
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| 基金项目： | 中国科学院资助项目，科技部科研项目 |
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| 摘 要： | Nickel-metal hydride （Ni/MH） batteries are one of promising batteries for electric vehicle applications, but at high temperature the charge efficiency of nickel electrode is very low. In order to improve the high-temperature-efficiency of nickel electrode, spherical nickel hydroxide mixed with various ratios of Lu2O3 was used as active material of pasted nickel electrodes. The results of charge/discharge experiments, cyclic voltammetric measurements and XRD characterizations have shown that after addition of Lu2O3, the oxygen evolution overpotcntial is elevated much, the charge efficiency of nickel electrode at high temperature is greatly improved and the content of β-NiOOH phase increases in charged electrodes. In addition, the mixed ratio of Lu2O3 has different effects on high temperature performances of nickel electrode at different charge/discharge currents, 3.5 % is the optimum mixed ratio, and the action of Lu2O3 on high temperature electrochemical behaviors is more apparent when nickel electrodes are charged at small current than large current.
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| 关 键 词： | Lu2O3 充放电性能 球形氢氧化镍 镍氢电池 高温 稀土 |
| 文章编号： | 1002-0721（2005）06-0732-05 |
| 收稿时间： | 2005-03-20 |
| 修稿时间： | 2005-05-25 |
Effect of Lu2O3 on Charge/discharge Performances of Spherical Nickel Hydroxide at High Temperature |
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| Ren Junxia,Wang Xiaojian,Li Yuzhan,Gao Xueping,Yan Jie. Effect of Lu2O3 on Charge/discharge Performances of Spherical Nickel Hydroxide at High Temperature[J]. Journal of Rare Earths, 2005, 23(6): 732-736 |
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| Authors: | Ren Junxia Wang Xiaojian Li Yuzhan Gao Xueping Yan Jie |
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| Abstract: | Nickel-metal hydride (Ni/MH) batteries are one of promising batteries for electric vehicle applications, but at high temperature the charge efficiency of nickel electrode is very low. In order to improve the high-temperature-efficiency of nickel electrode, spherical nickel hydroxide mixed with various ratios of Lu2O3 was used as active material of pasted nickel electrodes. The results of charge/discharge experiments, cyclic voltammetric measurements and XRD characterizations have shown that after addition of Lu2O3, the oxygen evolution overpotential is elevated much, the charge efficiency of nickel electrode at high temperature is greatly improved and the content of β-NiOOH phase increases in charged electrodes. In addition, the mixed ratio of Lu2O3 has different effects on high temperature performances of nickel electrode at different charge/discharge currents, 3.5 % is the optimum mixed ratio, and the action of Lu2O3 on high temperature electrochemical behaviors is more apparent when nickel electrodes are charged at small current than large current. |
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| Keywords: | spherical nickel hydroxide high temperature performances Lu2O3 oxygen evolution overpotential rare earths |
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