摘要
当前锂离子电池的的普遍应用,使人们对锂离子电池的正极材料非常关注,而磷酸亚铁锂作为正极材料有很多优点如无毒性,对环境友好,原材料来源丰富,比容量高,循环性能好等,但电子导电率较低和锂离子迁移速率较低的缺点,成为其商业化的难题之一。以葡萄糖为C源对材料进行掺杂及包覆,用XRD、恒流充放电研究了材料的结构和电化学性能。结果表明包覆后的材料的橄榄石型晶体结构不会变化,并且电化学性能有明显的提高。
Wide application of lithium ion battery makes people pay more attention to cathode material of lithium - ion batteries. Lithium iron phosphate as the cathode material has many advantages such as non - toxic ability, envi- ronmental friendliness, abundant raw materials sources, high specific capacity, good cycle performance, but there is a disadvantage of low electrorric conductivity, which is also a problem in conducting it commercially. To improve the behavior of olivine LiFeP04, glucose is used as carbon source coating. The results maintain the structure of ol- ire -type phase and the electrochemical is greatly improved.
出处
《兰州石化职业技术学院学报》
2015年第1期14-16,共3页
Journal of Lanzhou Petrochemical Polytechnic
基金
甘肃省高校基本科研业务费专项资金项目(甘财教[2012]129号)
兰州市研政产合作项目(兰财建[2012]151号(2012-2-98))
甘科技支撑计划项目(144GKCA035)
关键词
磷酸亚铁锂
正极材料
葡萄糖碳源
碳包覆
Lithium iron phosphate
cathode materials
carbon source
carbon coating
