锂离子电池正极材料LiFePO_4的电化学性能改进  

Improvement of electrochemical performance of LiFePO_4 cathode materials for lithium-ion battery

作　　者：杨蓉[1] 赵铭姝[1] 赵青[2] 马红利[1] 宋晓平[1] 

机构地区：[1]西安交通大学理学院材料物理系,陕西西安710049 [2]西安理工大学理学院应用化学系,陕西西安710048

出　　处：《化工学报》2006年第3期674-677,共4页CIESC Journal

基　　金：陕西省教育厅项目(04JK225)~~

摘　　要：LiFePO4 and carbon-doped LiFePO4were prepared by a novel solid-phase synthesis.The samples were characterized by X-ray diffraction,SEM,elemental analysis and electrochemical performances.These test results showed that the reaction conditions favored stabilization of samples as well as offered some control of the product morphology.Carbon-doped LiFePO4 retained olivine structure and had good electrochemical performance.The results of electrochemical evaluation of the doped product showed a lithium insertion plateau around 3.5 V（vs.Li/Li+） together with the initial charge specific capacity of 159.9 mAh·g-1 at 0.1C rate and with little specific capacity decay after 20 cycle at room temperature.LiFePO4 and carbon-doped LiFePO4 were prepared by a novel solid-phase synthesis. The samples were characterized by X-ray diffraction, SEM, elemental analysis and electrochemical performances. These test results showed that the reaction conditions favored stabilization of samples as well as offered some control of the product morphology. Carbon-doped LiFePO4 retained olivine structure and had good electrochemical performance. The results of electrochemical evaluation of the doped product showed a lithium insertion plateau around 3.5 V （vs.Li/Li＋） together with the initial charge specific capacity of 159.9 mAh·g^-1 at 0.1C rate and with little specific capacity decay after 20 cycle at room temperature.

关 键 词：锂离子电池 正极材料 磷酸亚铁锂 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]