| 贮氢合金氧化量的检测及其性能衰减研究 |
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| 引用本文： | 夏保佳,尹鸽平,史鹏飞,程新群.贮氢合金氧化量的检测及其性能衰减研究[J].电池,2000,30(5):198-200. |
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| 作者姓名： | 夏保佳 尹鸽平 史鹏飞 程新群 |
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| 作者单位： | 1. 中国科学院上海冶金研究所，上海 200050
2. 哈尔滨工业大学应用化学系，黑龙江哈尔滨 150001 |
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| 摘 要： | 用ｐＨ＝１０的ＥＤＴＡ溶液洗涤循环一定次数后的金属氢化物电极，再用ＩＣＰ－ＡＥＳ分析其中的Ｌａ３＋和Ｎｉ２＋以确定循环中被氧化的Ｌａ和Ｎｉ。结果表明：ＭｍＮｉ３．５５Ｃｏ０．７５Ｍｎ０．４Ａｌ０．３合金中的稀土元素优先被氧化。随着循环次数的增加，这种现象越明显。贮氢合金的氧化导致充电贮备容量的降低，因而电池内压和充电电压不断升高，电池充电时很容易析出气体。
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| 关 键 词： | MmNi3.55Co0.75Mn0.4Al0.3合金 氧化量 电池 贮氢电极 |
| 文章编号： | 1001-1579(2000)05-198-03 |
| 修稿时间： | 1999年11月5日 |
A Study of the Oxidation Determination of the Mm Hydrogen Storage Alloy and its Performance Degradation |
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| XIA Bao-jia,YIN Ge-ping,SHI Peng-fe,CHENG Xin-qun.A Study of the Oxidation Determination of the Mm Hydrogen Storage Alloy and its Performance Degradation[J].Battery Bimonthly,2000,30(5):198-200. |
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| Authors: | XIA Bao-jia YIN Ge-ping SHI Peng-fe CHENG Xin-qun |
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| Abstract: | MH electrodes after a certain number of charge - discharge cycles were washed with EDTA solution (pH = 10), the dissolved La3+ and Ni2+ in the solution were analyzed by ICP - AES to determine the amount of La and Ni oxidized during cycling. The result indicated that Mm contained in hydrogen storage alloy was oxidized preferentially. The oxidation became more obvious with the increase of cyclic numbers. The oxidation of the hydrogen - storage alloy resulted in the decrease of charging reserve capacity, therefore, the internal pressure and the charging voltage of MH/Ni battery increased gradually, the gases evolution became more easily when the battery was charged. |
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| Keywords: | MmNi3 55Co0 75 Mn0 4 Al0 3 Alloy Oxidation Battery MH Electrode |
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