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锂离子电池中的尺寸效应与表界面问题研究


□ 李 泓 王兆翔 黄学杰 陈立泉

  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.
  关键词锂离子电池, 尺寸效应,表界面问题,热力学,动力学
  Size effects and surface/interface issues in lithium ion batteries
  LI.HongWANG Zhao\|XiangHUANG Xue\|JieCHEN Li\|Quan
  (Nanoscale Physics and Devices Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China)
  AbstractOur 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. ......
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