Ni-MH动力电池用负极材料的研究现状

Research Status of Anode Material Used for Ni-MH Power Battery

能源危机日益加重,寻求替代能源已迫在眉睫。Ni-MH动力电池以其在多方面的优势而成为HEV和EV首选的动力设备。动力电池对电极材料提出了较一般电池不同的要求。主要介绍了近年来动力电池用新型贮氢合金种类、常用替代元素的作用及其发展方向。AB_3型贮氢合金以其出众的放电容量和活化性能有望成为AB_5型贮氢合金的替代品应用于动力电池。由于Co的毒害效应,且近年来金属Ni、Co的价格不断上涨,低Co、无Co以及低Ni贮氢合金成为新的研究方向。我国稀土资源丰富,为我国发展Ni-MH动力电池提供了有利条件,可推动我国电动车的发展,也有利于环境保护。

As human is running out of fossil energy, it＇s very necessary to develop a new kind of energy. Ni- MH power battery is appropriate to HEV and EV for its advantages of electrochemical properties. This paper introduces some common materials used as anode of Ni-HM battery and how to improve their electrochemical properties, especially ABa alloys. ABa-type alloys have higher discharge capacity than AB3-type alloys and better activity property than ABe alloys. Meanwhile, Co-free and low Ni alloys are getting much attention these years.