摘要
作为一种新型层状材料,富锂镍钴锰酸锂具有良好的应用前景,然而其存在一定的结构缺陷和性能差异。尝试使用石墨烯对富锂镍钴锰酸锂材料进行改性,得到性能优良的锂离子电池正极材料,并采用X射线衍射、拉曼光谱、扫描电镜等谱学技术以及恒电流充放电技术对改性后的材料进行了表征与测试。结果显示,该材料粒径较小且分布均匀,具有良好的充放电比容量(分别为251.7mAh/g和164.5mAh/g),和优良的循环稳定性。
As a layered material,lithium-rich nickel-cobalt-manganese oxide（LNCM）has a most promising application as a next-generation anode material for lithium ion batteries（LIBs）.However,there exist some structural defects and poor performance associated with the material.In order to improve its electrochemical performance,graphene was used to modify the ternary materials,and the graphene-modified materials were characterized by X-ray diffraction,raman spectroscopy,scanning electron microscopy and constant current charge/discharge testing.The results showed that the modified LNCM material presented good electrochemical performance,such as charge/discharge capacity of 251.7/164.5mAh·g-1,and good cycling stability.
出处
《化工新型材料》
CAS
CSCD
北大核心
2015年第10期91-93,97,共4页
New Chemical Materials
关键词
富锂镍钴锰酸锂
石墨烯
锂离子电池
正极材料
lithium-rich nickel-cobalt-manganese oxide
graphene
lithium ion battery
anode material
