尖晶石锰酸锂表面包覆改性材料作用机理研究进展  

Research progress on the surface coating modification material working mechanism of the spinel lithium manganese oxide cathode material

作　　者：陈姿 江奇 李欢 邱家欣 刘青青 卢晓英 

机构地区：[1]西南交通大学超导与新能源研究开发中心材料先进技术教育部重点实验室,成都610031 [2]西南交通大学生命科学与工程学院,成都610031 [3]西南交通大学机械工程学院,成都610031

出　　处：《功能材料》2017年第11期11060-11065,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50907056;51602266);四川省重点研发计划资助项目(2017GZ0109);四川省科技支撑资助项目(2016GZ0273;2016GZ0275);四川省成都市科技惠民工程资助项目(2014-HM01-00073-SF)

摘　　要：尖晶石锰酸锂具有优异的安全性、低廉的价格、良好的大电流充放电能力和耐过充放性能以及环境友好等优点,是一种能被广泛应用于锂离子动力电池的正极材料之一。然而,锰酸锂锂离子电池目前仍然存在容量衰减较快以及高温性能较差的问题,这严重制约了其在动力电池方面的应用。为此发展起来的表面包覆改性技术能有效的改善锰酸锂的这些问题。到目前为止,发展出了许多包覆材料,有碳材料、氧化物材料等。就这些包覆材料对锰酸锂材料性能改善的机理来进行分类,详细讨论了表面包覆技术如何来改善锰酸锂的循环性能和高温性能,提出其进一步的发展方向。Spinel lithium manganese oxide is one of the lithium-ion power battery cathode materials for its safety,low cost,good high current charge and discharge capacity,good resistance to overcharging performance and environmental friendliness.However,LiMn2O4 lithium-ion battery has the disadvantages of capacity fading fast and poor cycle performance at elevated temperature,which hinder the cells’ further applications.A surface coating modification technology has been developed to solve these problems.Until now,many coating materials were discovered to coat LiMn2O4 material,such as carbon materials,oxide materials and so on.In this paper,the coating materials were classified as the working mechanisms of the coating materials.The mechanism of surface coating modification technology improving the LiMn2O4 lithium-ion battery capacity fading performance and cycle performance at elevated temperatures through the coating materials was discussed.At the same time,the further research and development orientation were put forward.

关 键 词：尖晶石锰酸锂 正极材料 表面包覆技术 包覆材料 作用机理 综述 

分 类 号：TM912[电气工程—电力电子与电力传动]