物理化学学报2009，Vol.25Issue(5)：1004-1008,5.
微波合成法制备锂离子电池正极材料Li2FeSiO4
Preparation of Li2FeSiO4 Cathode Material for Lithium-Ion Batteries by Microwave Synthesis
摘要
Abstract
We report a novel synthetic route for the preparation of the Li2FeSiO4 cathode material by microwave processing.The Li2FeSiO4 material was synthesized using mechanical ball-milling and subsequent microwave processing.The prepared samples were characterized by X-ray diffraction,manning electron microscopy,and electrochemical methods.Properties of the prepared materials and electrochemical characteristics of the samples were investigated and compared to samples prepared by the conventional solid-state reaction.The obtained results indicated that highly pure Li2FeSiO4 material with uniform and fine particle size was quickly and successfully synthesized by microwave(MW) heating at 650℃ for 12 min.This compound showed high specific capacity and good cycle ability.The initial discharge capacity of the sample obtained by MW heating delivered 119.5 mAh·g-1 at 60℃ at a current density of C/20 rate(1C=160 mA·g-1).After 10 cycles the discharge capacity maintained 116.2 mAh·g-1.The Li2FeSiO4 material displayed higher phase purity,better microstructure,and better electrochemical properties than the sample prepared by the conventional solid-state method.关键词
锂离子电池/正极材料/Li2FeSiO4/微波合成Key words
Li-ion battery/Cathode material/Li2FeSiO4/Microwave synthesis分类
化学化工引用本文复制引用
胡国荣,曹雁冰,彭忠东,杜柯,蒋庆来..微波合成法制备锂离子电池正极材料Li2FeSiO4[J].物理化学学报,2009,25(5):1004-1008,5.基金项目
国家科技支撑计划项目(2007BAE12B01-1)及湖南省科技计划项目(2008GK3015)资助 （2007BAE12B01-1）
