复合金属氧化物正极材料Li(CoxNiyMn1-x-y)O2高功率锂离子动力电池的试制及电化学性能的研究

Synthesis and Electrochemical Performance Study of Cathode Material Li(Co_xNi_yMn_(1-x-y))O_2 for High Power Lithium Ion Secondary Battery

用化学方法合成用于锂离子动力电池正极的新型高电压高容量复合金属氧化物材料Li(CoxNiyMn1-x-y)O2,试制了具有良好热稳定性的高功率8Ah锂离子动力电池。在研究了该电池的电化学性能后,研制了用于混合动力电动车辆的电池系统并进行了车载实验。结果表明该电池系统在深度放电条件下不仅显现出十分优越的循环性能和一致性,经过模拟工况测试后的数据还表明单体电池升温最高仅为5℃,即电池系统还具有良好的热稳定性,因此该电池系统是适合用于混合动力电动汽车的。

Abstract High capacity and high voltage composite metal oxide Li（CoxNiyMn1-x-y）O2 used in high power lithium ion secondary batteries was synthesized by chemical method. 8 Ah high power lithium ion batteries with this cathode material were fabricated and studied, and the battery system were tested in Hybrid Electric Vehicle （HEV）. The results show that the battery system holds excellent cycle performance and uniformity. Furthermore, the highest temperature increase of individual batteries is just 5℃ which means the battery system holds good thermal stability. Consequently this battery system fits HEV very well.