硅酸盐学报2011，Vol.39Issue(10)：1608-1612,5.
锰掺杂磷酸铁锂／碳正极材料的制备及电化学性能
Synthesis of Manganese-Doped Lithium Iron Phosphate/Carbon Composite and Its Electrochemical Performances
摘要
Abstract
LiMn0.45Fe0.55 PO4/C, as a cathode material of lithium ion batteries, was prepared with MnPO4H20, FePO2H20 and Li2CO3 as precursors and glucose as both reducing agent and carbon source by one-step carbothermal reduction. The effect of synthesis temperature on the performances of LiMn0.asFe0.55PO4/C composites was investigated. The morphology and microstructure of the products were characterized by X-ray diffraction and scanning electron microscopy. The results show that LiMno.45Feo.55PO4/C solid solution can be prepared from 500 to 600 ℃. As an electrode material for rechargeable lithium ion batteries, the solid solution prepared at 600 ℃ exhibited a superior electrochemical performance. The initial discharge capacity of the sample reached 146.6, 133.5, 124.1 and 94.4 mA＇h/g at the current density of 15, 75, 150 mA/g and 300 mA/g, respectively. In addition, this sample showed a good cycle performance. After 50 cycles it retained 97.5%, 95.8% and 97.6% of the initial discharge capacity at 15, 75 mA/g and 150 mA/g, respectively. It was indicated that the electrochemical performance of the sample at 55℃ was better than that at 25 ℃.关键词
锂离子电池/正极材料/锰掺杂/碳热还原Key words
lithium ion batteries/cathode materials/manganese doping/carbothermal reduction分类
信息技术与安全科学引用本文复制引用
杨则恒,赵刚,张卫新..锰掺杂磷酸铁锂／碳正极材料的制备及电化学性能[J].硅酸盐学报,2011,39(10):1608-1612,5.基金项目
国家自然科学基金(20871038,20976033)、安徽省教育厅资助项目(TD200702)和国家大学生创新基金(101035925)资助. （20871038,20976033）
