| RE(NiCoMnTi)5合金不同放电深度下的交流阻抗谱 |
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| 引用本文： | 朱光明,雷永泉,成少安,杨晓光,王启东.RE(NiCoMnTi)5合金不同放电深度下的交流阻抗谱[J].物理化学学报,2001,17(12):1086-1091. |
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| 作者姓名： | 朱光明 雷永泉 成少安 杨晓光 王启东 |
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| 作者单位： | State Key Laboratory for Physical Chemistry of the Solid Surface,Department of Chemistry,Xiamen University,Xiamen 361005;Department of Materials Science and Engineering,Zhejiang University,Hangzhou,310027; Department of Chemistry,Zhejiang University,Hangzhou ,310027 |
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| 基金项目： | 国家自然科学基金(59801008)和国家863高新技术计划(715-004-0060)资助项目 |
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| 摘 要： | 研究了La(NiCoMnTi)5、Ce(NiCoMnTi)5、Pr(NiCoMnTi)5和Nd(NiCoMnTi)5四种贮氢合金电极在不同放电深度(DOD, depth of discharge)下的交流阻抗谱.结果表明,在金属相α、氧化物相β和α＋β相区,合金有明显不同的放电动力学特征.在50％DOD时,四种合金表面吸附电阻Rsf和法拉第阻抗RF分别与它们的最大放电容量C50,max和高倍率放电率κ呈近似的线性关系,即Rsf和RF越小,C50,max和κ分别越大.
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| 关 键 词： | 贮氢电极合金 交流阻抗 稀土 放电深度（DOD） |
| 收稿时间： | 2001-05-21 |
| 修稿时间： | 2001年5月21日 |
AC Impedance of RE (NiCoMnTi)5 Alloy under Different Depth of Discharge |
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| Zhu Guang-Ming,Lei Yong-Quan,Cheng Shao-An,Yang Xiao-Guang,Wang Qi-Dong.AC Impedance of RE (NiCoMnTi)5 Alloy under Different Depth of Discharge[J].Acta Physico-Chimica Sinica,2001,17(12):1086-1091. |
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| Authors: | Zhu Guang-Ming Lei Yong-Quan Cheng Shao-An Yang Xiao-Guang Wang Qi-Dong |
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| Institution: | State Key Laboratory for Physical Chemistry of the Solid Surface,Department of Chemistry,Xiamen University,Xiamen 361005;Department of Materials Science and Engineering,Zhejiang University,Hangzhou,310027; Department of Chemistry,Zhejiang University,Hangzhou ,310027 |
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| Abstract: | Electrochemical impedance spectra (EIS) of RE(NiCoMnTi)5 alloys (RE=La,Ce,Pr,Nd) were measured and analyzed under different depths of discharge (DOD).The results reveal that at different phase areas,such as β,α＋β and α,the alloy shows quite different characteristics in their discharge kinetics. At the same DOD of 50％,the surface hydrogen adsorbing resistance Rsf and Faraday resistance RF of the four alloys represent an approximate linear relationship to their the maximum discharge capacity C50,max and the high-rate-dischargeabi-lity κ respectively,indicating the alloy with a higher Rsf and RF will have a larger capacity and better dischargeability. |
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| Keywords: | Hydrogen storage electrode alloy Electrochemical impedance Rare earth depth of discharge (DOD) |
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