Effects of Mg2+ Doping on the Properties of LiFePO4 Synthesized via Hydrothermal Route

摘要：

Mg2+ doped LiFePO4 was synthesized from Li3PO4, FeSO4 and MgSO4 by a hydrothermal synthesis at 150 ℃（Li1-xMgxPO4, x=0.00, 0.01,0.02,0.04,0.06）. The samples were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and charge-discharge test. The results showed that Mg2+ dissolved in the LiFePO4 lattice. When the content is in the range of 0 to 6 mol％, Mg2+ caused the shrinkage of LiFePO4 cell volume. The capacity of doped and undoped samples at low discharging rate was similar, about 145mAhg-1 for 0.2C. But the sample doped with 2-4 mol％ Mg2+ has higher capacity and longer cycle lifetime than the undoped one at 5C.

关键词： Hydrothermal synthesis LiFePO4 Cathode Lithium-ion battery Mg2+

作者: Guangchuan LIANG Xiaoke ZHI Xiuqin OU Li WANG

作者单位: Institute of Power Source & Ecomaterials Science, Hebei University of Technology,300130, Tianjin, China

会议类型: 国际会议

会议名称: 2008年中美材料国际研讨会

会议地点: 重庆

会议语种:英文

页码: 498-501

在线出版日期: 2008-06-09（万方平台首次上网日期，不代表论文的发表时间）