自蔓延高温合成正极材料LiCoO_2的工艺研究  

Self-propagating high-temperature synthesis of cathode material LiCoO_2

作　　者：孙冰雪 陈秀娟[2] 马晓杰 

机构地区：[1]甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050 [2]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《粉末冶金工业》2015年第6期40-47,共8页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(51161012)

摘　　要：采用自蔓延高温合成工艺制备层状正极材料LiCoO_2,研究热处理温度和热处理时间及Li/Co物质的量比对合成产物中LiCoO_2的纯度、晶体结构及微观形貌的影响。利用X射线衍射仪和扫描电镜分析合成产物的相组成及其微观形貌。结果表明,制备LiCoO_2的最佳工艺条件为:Li/Co物质的量比1.000∶1.000、C6H12N4/Co物质的量比1.0∶3.0、热处理温度800℃、热处理时间1.5h,所得产物中LiCoO_2相纯度接近100%,且晶体具有较好的层状结构。Layered cathode material LiCoO： was synthesized by self-propagating high-temperature synthesis. X-ray diffractometer and scanning electron microscope （SEM） were used to investigate the effects of heat-treatment tem- perature, heat-treatment time and the mole ratio of Li to Co on purity, crystal structure and microstructure of LiCoO2. The results show that the optimum conditions are as follows： molar ratio of Li to Co is 1.000： 1.000, molar ratio of C6H12N4 to Co is 1.0： 3.0, heat-treatment temperature is 800 ℃ and heat-treatment time is 1.5 h. Under the optimum condition, the percentage of LiCoO2 phase in the products is near to 100%, and the crystal has good layer structure.

关 键 词：层状 正极材料 自蔓延高温合成 LICOO2 热处理 

分 类 号：O646.54[理学—物理化学] TM912[理学—化学]