摘要
针对MH/Ni电池充电过程中氧的产生和不恰当的消除方式带来的内压升高和热量聚集使电池总体性能衰减很快的问题,提出采用降低化学催化氧还原的比例,提高热量产生少的电催化氧还原比例的方法加以解决.金属酞菁类化合物是一种电催化氧还原剂.添加酞菁的MH/Ni电池与对比电池进行容量衰减、内压、大电流放电等特性比较,其性能均有显著提高.
In MH/Ni battery, oxygen evolution causes a high inner pressure during charge and overcharge, and an inappropriate elimination of the oxygen in the battery results in accumulation of heat. This is the main obstacle in developing and applying high capability and high power battery. How to reduce the ratio of the chemical catalysis rate to the electric catalysis rate in MH/Ni battery is considered as an urgent question. In this paper, ring-metalated phthalocyanine compounds were chosen as an electrochemical catalyst. Batteries with or without of the electrochemical catalyst were prepared. The curves of their inner pressure, the capacity attenuation, the discharge voltage and capacity at high current were compared. Experimental results show that the performance of batteries was obviously improved by the addition of the electrochemical catalyst.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2003年第9期854-857,共4页
Acta Physico-Chimica Sinica
基金
国家重点基础研究发展规划项目资助(2002CB211800)~~
关键词
酞菁类化合物
MH/NI电池
性能
电化学催化剂
消氧
动力电池
电极结构
MH/Ni batteries
ring-metalated phthalocyanine compounds
electrochemical catalyst
oxygen elimination
inner pressure
