Effects of substitution with foreign metals on the crystallographic, thermodynamic and electrochemical properties of AB5-type hydrogen storage alloys
Effects of substitution with foreign metals on the crystallographic, thermodynamic and electrochemical properties of AB5-type hydrogen storage alloys
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DOI：
10.1016/0013-4686(95)00283-k
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发表时间：
1996
影响因子：
6.6
通讯作者：
C. Iwakura;T. Oura;H. Inoue;M. Matsuoka
中科院分区：
文献类型：
--
作者：
C. Iwakura;T. Oura;H. Inoue;M. Matsuoka
研究了掺杂对AB 5型贮氢合金的晶体学、热力学和电化学性能的影响。MmNi 5 − xAlx（Mm =混合稀土，0.2 <$x <$1.0）合金的晶胞体积和氢化物生成焓变（−ΔH）值随x值的增加而单调增加，但放电容量和高倍率放电性能有一个极限值。对于MmNi4.2Al0.4M0.4（M = Cr，Mn，Fe，Co）合金，随着金属键半径的增大，晶胞体积和−ΔH值均增大。特别是锰提高了放电容量和高倍率放电性能。
Effects of substitution with foreign metals on the crystallographic, thermodynamic and electrochemical properties of AB5-type hydrogen storage alloys were investigated. The unit cell volume of MmNi5 − xAlx(Mm = mischmetal, 0.2 ⩽ x ⩽ 1.0) alloys and the values of enthalpy change (−ΔH) in hydride formation increased monotonously with an increase in x-value, but the discharge capacity and high-rate dischargeability had a limiting value. For the MmNi4.2Al0.4M0.4(M = Cr, Mn, Fe, Co) alloys, both the unit cell volume and the −ΔH value increased with increasing metallic bond radius of the foreign metal. Especially, manganese improved the discharge capacity and the high-rate dischargeability.