摘要
为了改善MH Ni电池的性能 ,在由不同的处理方法得到MmNi3 .55Co0 .75Mn0 .4 Al0 .3 贮氢合金表面氧含量不同的基础上 ,通过电池的充放电测试 ,以及电池充放电及静止过程中内压变化的测量 ,研究了合金表面不同氧化物含量对金属氢化物电极和电池有关性能的影响规律。结果表明 :贮氢合金的表面氧化物含量越低 ,合金的质量比容量便越高 ,同时负极的初始活化性能越好 ,负极的工作电位越负 ,电池的内压越低。在此基础上 ,通过向负极中加入 1%化学镀催化剂的乙炔黑 ,用以加速氧的复合 ,结果使MH Ni电池充电时的内压进一步降低。
Different contents of oxides in the surface of MmNi 3.55 Co 0.75 Mn 0.4 Al 0.3 were prepared through several methods, and the effects on the performance of MH electrode and Ni-MH battery were studied by the charge-discharge tests and the measure of internal pressure of battery during charge/discharge and shelving. The results show that the lower content of oxide in the surface of alloy, the higher mass specific capacities of the alloy, the better initial activation of negative electrodes, the lower working potential of the electrodes, the lower internal pressure of Ni-MH batteries. The internal pressure can be further lowered by adding 1% acetylene black, on which a catalyst is electroless plated, to the MH electrodes.
出处
《电源技术》
CAS
CSCD
北大核心
2000年第6期322-323,347,共3页
Chinese Journal of Power Sources
关键词
贮氢合金
电池性能
MH-NI电池
氧含量
添加剂
hydrogen storage alloy
surface property
additives to negative electrodes
performance of Ni-MH battery`
