摘要
提出了一种采用共沉淀法合成镁掺杂的锂离子正极材料LiFePO4的新方法,研究了合成条件,采用XRD,SEM,循环伏安测定,电化学阻抗谱分析,以及充放电测试对合成的材料作了表征分析.结果表明,采用共沉淀合成方法可以获得性能良好的LiFePO4;Mg2+掺杂对LiFePO4结构没有产生明显的影响,但掺杂量的大小对LiFePO4的放电性能有较大影响.
A new synthesis route of Mg^2＋ doped LiFePO4 is proposed. The samples are characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM）, and their electrochemical properties are investigated by using charge-discharge curve and electrochemical measurement technology （ cyclic vohammetry （ CV ） and electrochemical impedance spectroscopy （EIS） ）. Results show that the co-precipitation process allows the homogeneous mixing of the ingredient at atomic level, the Mg^2＋ ions doping does not affect the structure of materials, but the doping concentration of Mg^2＋ could affect the capacity and charge-discharge performance.
出处
《上海电力学院学报》
CAS
2009年第6期547-551,共5页
Journal of Shanghai University of Electric Power
基金
教育部科学技术研究重点项目(205055)
中国航天科工集团支撑技术基金项目(DL01-2004)
上海市能力建设项目(DL2009)
关键词
磷酸铁锂
离子掺杂
共沉淀
电化学性能
lithium iron phosphate
ion doping
co-precipitation
electrochemical properties
