摘要
十年来的研究并没有对LiFePO4的电化学反应机理形成准确一致的认识。复合阴离子(PO4)3-的应用使铁基化合物成为一种非常理想的锂离子电池正极备选材料。然而,LiFePO4的晶体结构却限制了其电导性与锂离子扩散性能,从而使材料的电化学性能下降。本文主要考虑充放电机理、相态转变、离子掺杂、锂离子扩散、电导、电解液、充放电动力学等因素的影响,从理论与实验角度综述了关于LiFePO4的电化学反应机理的研究进展。
The electrochemical mechanism of LiFePO4 as cathode material for lithium ion batteries during charging and discharging is still under debate after ten years of research. The use of polyanion, （PO4）^3- , makes it possible for ironbased compound to be one of the potential promising cathode material for lithium ion batteries. However, the interior structure of LiFePO4 determines the diffusion of electrons and lithium ions, and therefore deteriorate its electrochemical performance. From theoretical part and the aspect of practices of experiment, inner reactions during the processes of charging/discharging, phases transition, ion-doping, diffusion of lithium ions, conductivity, interactions between cathode material and electrolytes and the electrochemical kinetic of LiFePO4 based lithium ion batteries are described in this paper.
出处
《化学通报》
CAS
CSCD
北大核心
2008年第1期17-23,共7页
Chemistry
基金
青海省重点科技攻关项目(2006-G-168)资助
