摘要
采用鳞片石墨粉作为铝离子电池正极材料,其不同粒度大小对正极材料的表面特性和电化学性能都有影响。通过X射线衍射、X射线光电子能谱、充放电测试、倍率特性测试和循环性能测试分析该正极材料的晶体结构、化学价态和电化学性能。结果表明:铝离子电池正极材料鳞片石墨粉为良好的层状结构,P63/mc空间群,六方晶系。其中鳞片石墨粉325目(粒度45μm)在1C倍率下的充放电比容量分别为104.76和104.46mAh/g,其5C倍率较1C倍率的容量保持率为71.4%,循环100次后容量保持率为95.19%,因此其充放电比容量、倍率性能、循环性能等电化学性能较佳。
The anode material of aluminum-ion battery was made by using flake graphite powder with different particle size,which had influence on the surface property and electrochemical performance of material.By X-ray diffraction（XRD）,X-ray photoelectron spectroscopy（XPS）,charge and discharge test,ratio characteristics test,cyclic performance test and analysis,the crystal structure,appearance characteristics and electrochemical performance were analyzed.The results showed that flake graphite powder had layered structure,P63/mc space group,hexagonal crystal system and structural stability.When the particle size was 45μm,the charged and discharged capacities were 104.76 mAh/g and 104.46 mAh/g at 1C,the capacity retention ratio kept 71.4%at 5C ratio than 1C ratio,the ratio was 95.19% at 1C ratio after 100 cycles.Therefore,the flake graphite powder with 45μm particle size can have better charge and discharge specific capacity,ratio characteristics and cycle performance.
作者
吴汉杰
Wu Hanjie(Research Institute of Tsinghua Pearl River Delta,Guangzhou 510530)
出处
《化工新型材料》
CAS
CSCD
北大核心
2018年第6期190-193,共4页
New Chemical Materials
关键词
铝离子电池
正极材料
电化学性能
aluminium-ion battery
anode material
electrochemical performance
