物理化学学报2012，Vol.28Issue(2)：338-342,5.DOI:10.3866/PKU.WHXB201111242
钛离子掺杂对LiFe0.6Mn0.4PO4/C电化学性能的影响
Effect of Doping with Ti4+ Ion on the Electrochemical Performance of LiFe0.6Mn0.4PO4/C
摘要
Abstract
Tl-doped LiFeoeMn^PO^C materials were synthesized by a solid-state method. The structures, morphologies, and electrochemical performance of the materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and galvanostatic charge-discharge experiments. The results indicate that Ti4" doping does not change the structure of the materials, but remarkably improves their electrochemical performance. LKFeoeMno^afTWPOVC shows excellent rate performance, with initial specific discharge capacities of 160.3 and 134.7 mAh -g~' at 0.1 C and 10C rates. Even at the higher rate of 20C, it shows a discharge capacity of 124.4 mAh-g"'. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) analyses show that the resistance and the polarization of the LiFeoeMni^PCX/C composite electrode could be effectively decreased by Ti4* doping, which would account for the improved electrode performance.关键词
锂离子电池/磷酸铁锰锂/正极材料/离子掺杂/倍率性能Key words
Lithium-ion battery/ LiFe,.Jv1n,PO4/Cathode material/Ion doping/ Rate capacity分类
化学化工引用本文复制引用
高平,谭卓,成富圈,周恒辉,谭松庭..钛离子掺杂对LiFe0.6Mn0.4PO4/C电化学性能的影响[J].物理化学学报,2012,28(2):338-342,5.基金项目
国家高技术研究发展计划项目(863) (2009AA035200)资助 （863）
