锂离子电池中的尺寸效应与表界面问题研究  

Size effects and surface/interface issues in lithium ion batteries

作　　者：李泓[1] 王兆翔[1] 黄学杰[1] 陈立泉[1] 

机构地区：[1]中国科学院物理研究所纳米物理与器件实验室,北京100190

出　　处：《物理》2008年第6期416-420,共5页Physics

基　　金：国家自然科学基金(批准号:50730005);国家重点基础研究发展计划(批准号:2007CB935-6501)资助项目

摘　　要：文章介绍了锂离子电池中的尺寸效应与表界面问题的研究.从热力学与动力学方面讨论了小尺寸材料与体材料性质的区别以及作为储能材料的优缺点.从实际考虑,建议发展动力学稳定的纳米结构电极材料.Our efforts in developing nanostructured electrode materials and investigating the transport,storage and and reaction of lithium on the nanoscale level in lithium ion batteries are summarized briefly.With regard to the thermodynamics,there are many defects in small size materials which leads to instability and modification of various properties of the bulk materials.With regard to the kinetics,nanostructured materials possess large cross section reaction areas and short diffusion lengths,which in principle are beneficial for transport and reactions.However,the kinetic advantages of nanostructured materials cannot be exploited due to side reactions on the surfaces and interfaces.Therefore,the development of kinetically stable nanostructured materials should be pursued for practical applications.

关 键 词：锂离子电池 尺寸效应 表界面问题 热力学 动力学 

分 类 号：TM912[电气工程—电力电子与电力传动]