石墨/LiFePO_4电池循环过程的研究  

Research of cycle process of graphite/LiFePO_4 battery

作　　者：张建[1] 杨传铮[1] 娄豫皖[1] 夏保佳[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《电源技术》2012年第2期165-168,共4页Chinese Journal of Power Sources

基　　金：上海市科委纳米技术专项(1052nm00100);中国科学院院地合作项目(DBSH-2011-009);上海市自然科学基金(09ZR1437600)

摘　　要：利用X射线衍射分析对石墨/LiFePO4电池循环过程中正、负极活性材料和隔膜的晶体结构及精细结构的变化进行了研究。结果发现,电池的充放电容量随循环的进行先增加而后逐渐降低的现象与正极活性材料及隔膜的精细结构在循环过程中变化的共同作用有关,而与负极活性材料的关系不大。The variations of structure and fine structure of electrode materials and separator in a graphite/LiFePO4 battery during cycle process were studied by X-ray diffraction.It is revealed that,the capacity of the battery firstly increase and then degrease with the increase of cycles.The reason is related with the changes of fine structure of the positive active material and separator during cycle process.

关 键 词：石墨/LiFePO4电池 循环性能 精细结构 X射线衍射 

分 类 号：TM912.9[电气工程—电力电子与电力传动]