贮氢合金电极有机酸处理研究  

Surface Treatment of Hydrogen Storage Alloy Electrode by Organic Acids

作　　者：苏小笛[1] 刘昭林[1] 徐印 唐致远[1] 

机构地区：[1]天津大学应用化学系,天津300072

出　　处：《电池》1997年第6期263-265,271,共4页Battery Bimonthly

摘　　要：本文以甲酸、醋酸、草酸和氨基乙酸等有机酸在室温下对Mm(NiMnCoAl)_5型贮氢合金扣式电极进行较短时间的浸泡处理,结果使电极活化性能、首次放电容量、高倍率充放电性能均不同程度有所提高。借助ICP(等离子体发射光谱法)分析了贮氢合金经酸处理后的化学处理液的成分,初步讨论了电极电化学性能变化的原因。以氮基乙酸直接处理贮氢合金泡沫镍电极,装配成Ni—MH电池进行封口化成,两次即化成结束,1C、3C倍率下放电容量分别为0.2C的96.8％和89.4％,电池经500次循环,容量衰减仅11.5％。Metal hydride (Mm(NiCoMnAl)5) button electrodes were treated by formic acid,acetic acid,oxalic acid,or aminoacetic acid at moderate condition. As the result .electrocatalytic activity .activation characteristics . and high - rate charge - discharge ability of these treated electrodes were improved. In addition performances of the sealed Ni-MH batteries in which the MH electrode was treated by aminoacetic acid were investigated. It was found that the capacities at 1C and 3C rate reached 96. 8% and 89. 4% of that at 0. 2C rate respectively.Capacities of the battery decreased only 11. 5% after 500 cycles.

关 键 词：贮氢合金电极 有机酸处理 电化学性能 电池 

分 类 号：TM911.103[电气工程—电力电子与电力传动]