硅酸盐学报2011，Vol.39Issue(8)：1275-1280,6.
掺杂Ni、Mn和Cu对磷酸铁锂电化学性能的影响
Effect of Ni,Mn and Cu Doping on the Electrochemical Performances of LiFePO4
摘要
Abstract
The LiMxFe1–xPO4（M = Ni,Mn,Cu;x = 0.075,0.100,0.125,0.150,0.175） materials,which were doped by using Ni,Mn and Cu to replace the Fe site in the lattice of LiFePO4,respectively,were synthesized via a hydrothermal method.The phase structure,and electrochemical performance of the synthesized samples were characterized.The results indicate that the synthesized LiMxFe1–xPO4 samples have a crystal structure of LiFePO4 and a space group Pnma.The doping could increase the conductivity of the LiMxFe1–xPO4,decrease the Li＋ diffusion resistance,and dramatically increase the electrochemical performance of the LiMxFe1–xPO4.The optimal doping amount in a mole ratio of M（M = Ni,Mn,Cu） to Fe was 0.125：0.875.The LiNi0.125Fe0.875PO4 sample exhibited the superior electrochemical performance,which had a low charge transfer resistance（682.4 Ω）,a high specific capacity（127.8 mA·h·g^-1 in the initial cycle） and a better cycle life（the capacity fading rate was 13.2% after 50 cycles）.关键词
磷酸铁锂/离子掺杂/电化学性能Key words
lithium iron phosphate/ion doping/electrochemical performance分类
信息技术与安全科学引用本文复制引用
王圣平,董康,周权,周成冈,吴金平..掺杂Ni、Mn和Cu对磷酸铁锂电化学性能的影响[J].硅酸盐学报,2011,39(8):1275-1280,6.基金项目
湖北省自然科学基金(2010CDA017)资助项目. （2010CDA017）
