电源技术2012，Vol.36Issue(7)：951-952,965,3.
锂离子电池Li1.08Fe(PO4)1.08/C正极材料制备与电化学性能
Preparation and electrochemical performance of Li1.08Fe(PO4)1.08/Ccathode for lithium-ion batteries
摘要
Abstract
The pure ordered olivine compound of Li1.08Fe(PO4)1.08/C with an orthorhombic structure (space group Pnma) and Fe2+ vacancy was successfully synthesized with Li3PO4-NH4H2PO4 as raw material.The Li3PO4-NH4H2PO4 mixture was prepared by phosphate precipitation method with LiOH and NH4H2PO4 as starting material.The results of XRD and SEM show that the crystal structure and particle morphology of Li1.08Fe (PO4)1.08 powder are greatly influenced by creating the Fe2+vacancy in the crystal cell and by coating carbon at the surface of particle.The electrochemical testing indicates that the bare Li1.08Fe (PO4)1.08 cathode has the initial discharge specific capacity of 142.4 mAh/g at 0.2 C.The 9.23% C-Li1.08Fe (PO4)1.08,cathode possesses the excellent performance with an initial discharge specific capacity of 153.3 mAh/g at 0.2 C ratio and with a discharge specific capacity of 144.5 mAn/g in the 100th cycle.关键词
锂离子电池/磷酸铁锂/正极材料Key words
lithium ion batteries/lithium iron phosphate/cathode分类
信息技术与安全科学引用本文复制引用
胡传跃,郭军,彭秧锡..锂离子电池Li1.08Fe(PO4)1.08/C正极材料制备与电化学性能[J].电源技术,2012,36(7):951-952,965,3.基金项目
湖南省教育厅青年课题(10B054) （10B054）
湖南省科技计划项目(2011FJ3160 （）
2011GK2002) （）
