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.
出处
《粉末冶金工业》
CAS
北大核心
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)
