ELECTROCHEMICAL CHARACTERIZATION OF SURFACE-MODIFIED NEGATIVE ELECTRODES CONSISTING OF HYDROGEN STORAGE ALLOYS

被引:61
作者
MATSUOKA, M
ASAI, K
ASAI, K
FUKUMOTO, Y
IWAKURA, C
机构
[1] Department of Applied Chemistry, University of Osaka Prefecture, Sakai, Osaka, 593
关键词
D O I
10.1016/0925-8388(93)90214-8
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Negative electrodes consisting of MmNi3.6Mn0.4Al0.3Co0.7 alloy powder filled in a porous nickel substrate were modified by using different electroless plating baths or alkaline solutions containing hypophosphite as a reducing agent. The deposited metals function as a microcurrent collector and then increase the discharge capacity of the negative electrodes. In contrast, modification with a reducing agent gives rise to high electrocatalytic activity of the negative electrodes which leads to a remarkable reduction in overvoltage in charging and discharging even at the first cycle. It was found that such simple surface modifications improved the performance of negative electrodes under appropriate conditions with respect to the amount of electroless deposit or the concentration of reducing agent.
引用
收藏
页码:149 / 151
页数:3
相关论文
共 7 条
  • [1] SELF-DISCHARGE MECHANISM OF NICKEL-HYDROGEN BATTERIES USING METAL HYDRIDE ANODES
    IWAKURA, C
    KAJIYA, Y
    YONEYAMA, H
    SAKAI, T
    OGURO, K
    ISHIKAWA, H
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1989, 136 (05) : 1351 - 1355
  • [2] IWAKURA C, 1990, KIDORUI RARE EARTH, V17, P11
  • [3] DOUBLE-PHASE HYDRIDE FORMING COMPOUNDS - A NEW CLASS OF HIGHLY ELECTROCATALYTIC MATERIALS
    NOTTEN, PHL
    HOKKELING, P
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1991, 138 (07) : 1877 - 1885
  • [4] OGAWA H, 1989, POWER SOURCES, V12, P393
  • [5] EFFECTS OF MICROENCAPSULATION OF HYDROGEN STORAGE ALLOY ON THE PERFORMANCES OF SEALED NICKEL METAL HYDRIDE BATTERIES
    SAKAI, T
    ISHIKAWA, H
    OGURO, K
    IWAKURA, C
    YONEYAMA, H
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1987, 134 (03) : 558 - 562
  • [6] THE INFLUENCE OF SMALL AMOUNTS OF ADDED ELEMENTS ON VARIOUS ANODE PERFORMANCE-CHARACTERISTICS FOR LANI2.5CO2.5-BASED ALLOYS
    SAKAI, T
    MIYAMURA, H
    KURIYAMA, N
    KATO, A
    OGURO, K
    ISHIKAWA, H
    IWAKURA, C
    [J]. JOURNAL OF THE LESS-COMMON METALS, 1990, 159 (1-2): : 127 - 139
  • [7] METAL HYDRIDE ANODES FOR NICKEL-HYDROGEN SECONDARY BATTERY
    SAKAI, T
    MIYAMURA, H
    KURIYAMA, N
    KATO, A
    OGURO, K
    ISHIKAWA, H
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1990, 137 (03) : 795 - 799