EFFECT OF ALLOY COMPOSITION ON HYDROGEN DIFFUSION IN THE AB(5)-TYPE HYDROGEN STORAGE ALLOYS

被引：69

作者：

IWAKURA, C ^{[1
]}

OURA, T ^{[1
]}

INOUE, H ^{[1
]}

MATSUOKA, M ^{[1
]}

YAMAMOTO, Y ^{[1
]}

机构：

[1] RITSUMEIKAN UNIV,FAC SCI & ENGN,DEPT CHEM,KUSATSU,SHIGA 525,JAPAN

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1995年 / 398卷 / 1-2期

关键词：

HYDROGEN DIFFUSION; DIFFUSION COEFFICIENT; HYDROGEN STORAGE ALLOY; NICKEL-HYDROGEN BATTERY;

D O I：

10.1016/0022-0728(95)04253-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Disc-type and powder-type electrodes of hydrogen storage alloys having the compositions MmNi(4.2)Al(0.5)M(0.3)(Mm = misch metal; M = Cr, Mn, Fe, Co, Ni) were used for the evaluation of diffusion coefficients of hydrogen by the potential-step method and the electrochemical measurement of the pressure-composition isotherm respectively. The Einstein diffusion coefficient, being independent of hydrogen concentration, was measured as a function of the atomic radius of foreign metals(M). The diffusion kinetics of the hydrogen atom in the alloys was discussed based on the thermodynamic stability of the resulting hydrides and electrostatic interaction between foreign metals and hydrogen.

引用

页码：37 / 41

页数：5

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