微波合成锂离子电池正极材料LiCoO_2的研究  

Study on microwave synthesis of Li-ion battery cathode materials LiCoO_2

作　　者：翟秀静[1] 于永丽[1] 符岩[1] 王云霞[1] 

机构地区：[1]东北大学材料冶金学院,沈阳110004

出　　处：《材料科学与工艺》2009年第1期96-99,共4页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50174016)

摘　　要：为了研究锂离子电池的正极材料LiCoO2的新型制备方法,考查了反应原料配比、微波输出功率、微波合成温度和微波加热时间对LiCoO2结构和性能的影响.以LiOH·H2O和Co2O3为反应原料的最佳合成条件:Li/Co摩尔比为1.05∶1,微波输出功率为360W,反应时间为14min,合成温度为800℃.所合成LiCoO2样品均采用XRD和SEM进行表征,结果表明,采用微波合成的LiCoO2样品为单一相层状结构且晶体结构发育良好;样品的充放电循环性能良好,首次循环放电容量为130mAh/g.The preparation of cathode lithium ion battery materials LiCoO2 by microwave synthesis was studied for developing a new method to prepare lithium ion battery materials. The effects of Li/Co mole ratio, microwave output power, temperature and heating time on the structure and property of the material were studied. The optimum conditions were obtained as follows： LiOH . H2O and Co2O3 as raw materials, Li/Co mole ratio of 1.05： 1, microwave output power of 360 W, heating time of 14 min and temperature of 800 ℃. The synthe- sized LiCoO2 was characterized by XRD and SEM. It is found that the samples of LiCoO2 synthesized by micro- wave heating have a well-grown layer structure and exhibit a good electrochemical performance with the first cycle charge-discharge specific capacity of 130 mAh/g.

关 键 词：锂离子电池正极材料 LICOO2 微波合成 电化学性能 循环放电容量 

分 类 号：TG146.263[一般工业技术—材料科学与工程]