摘要
通过溶液沉淀-热处理方法制备了MoO3正极材料。对制备材料的结构和电化学性能进行了表征。结果表明，得到的MoO3为纯的正交相结构。片状M003颗粒的粒径大小约200～500nm，厚度约50nm。片状颗粒倾向于堆积在一起形成层状结构。在电流密度为O．3mA／cm2。，电压范围1．5～4．0V的条件下，MoO3样品的首次放电比容量为368mAh／g,库仑效率85．2％，是具有较大脱嵌锂容量的锂离子电池正极材料。
MoO3 material was prepared by chemical precipitation and heat treatment method. The structural and morphological properties of the product were investigated by XRD and SEM. All the diffraction peaks from the pattern of MoO3 can be readily indexed to the pure phase of a-MoO3 with the orthorhombic structure. It can be seen that MoO3 sample consists of small laminar nanocrystallites with a wide range of size distribution varying from 200 to 500 nm and thickness of about 50 nm, which appear stacked in multi-layers. The initial discharge specific capacity of MoO3 is 368 mAh/g and coulombic efficiency is 85.2%, indicating that MoO3 is an active cathode material with large lithium intercalation capacity for lithium ion batteries.
出处
《电源技术》
CAS
CSCD
北大核心
2013年第11期1918-1919,1961,共3页
Chinese Journal of Power Sources
基金
湖北省自然科学基金项目(2011CDA066)
关键词
锂离子电池
正极材料
正交相MoO3
lithium ion batteries
cathode material
orthorhombic molybdenum trioxide
