| Application of thermal electrochemical equation to metal-hydride half-cell system |
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| 作者姓名： | 刘开宇 黄伯云 张平民 贺跃辉 周科朝 苏耿 |
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| 作者单位： | [1]School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China [2]State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
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| 基金项目： | Project（2001AA501433） supported by the National High Technology Research and Development Program of China |
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| 摘 要： | 1 INTRODUCTIONNickel-metal hydride ( Ni/ MH) battery be-came the principal power of electronic vehicle be-cause of its excellent characteristics such as highenergy density , high power , no memory effect ,long service life and wide temperature perform-ance . The hydrogen storage alloy is the key mate-rial of Ni/ MH dynamical battery , a mass of re-search work such as the technique of preparation,the performance of thermodynamics , kinetics andelectrochemistry were accomplished in recenty…
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| 关 键 词： | 储氢材料 热电化学 焓 内电阻 |
| 文章编号： | 1005-9784（2006）02-0146-05 |
| 收稿时间： | 2005-08-10 |
| 修稿时间： | 2005-10-20 |
Application of thermal electrochemical equation to metal-hydride half-cell system |
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| Liu Kai-yu , Huang Bai-yun , Zhang Ping-min , He Yue-hui , Zhou Ke-chao and Su Geng.Application of thermal electrochemical equation to metal-hydride half-cell system[J].Journal of Central South University of Technology,2006,13(2):146-150. |
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| Authors: | Liu Kai-yu Huang Bai-yun Zhang Ping-min He Yue-hui Zhou Ke-chao and Su Geng |
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| Affiliation: | (1) School of Chemistry and Chemical Engineering, Central South University, 410083 Changsha, China;(2) State Key Laboratory of Powder Metallurgy, Centeral South University, 410083 Changsha, China |
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| Abstract: | Application of thermal electrochemical equation to metal-hydride half-cell system was investigated, and the influence of state of charge on the thermal electrochemical performance of hydrogen storage materials was studied. The results show that both the absolute value of the molar enthalpy change and the internal resistance of evolution hydrogen reaction are less than that of absorption hydrogen reaction at the same state of charge. The molar reaction enthalpy change of absorption and evolution of hydride electrode change contrarily with the enhancement of filling degree of hydrogen in hydride electrode. The relation curve of molar reaction enthslpy change to state of charge, both absorption and evolution hydrogen reaction, is close to a constant when the state of charge is 10%- 60%, and during state of charge below 10% or state of charge above 60%, the molar reaction enthalpy change varies sharply. Meanwhile, the internal resistance of electrode reaction has an ascending trend with the enhancement on filling degree of hydrogen in hydride electrode in both absorption and evolution hydrogen reaction. |
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| Keywords: | hydrogen storage material thermal electrochemical method state of charge application change of enthalpy internal resistance |
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