摘要
Li（1.2）Fe（0.052）Ni（0.078）Co（0.13）Mn（0.54）O2/C是先以MnO2为模板用铁离子替换镍离子制备好Li（1.2）Fe（0.052）Ni（0.078）Co（0.13）Mn（0.54）O2,然后用碳包覆的方法制备而成的。经过电化学性能测量发现这种材料具有良好的电化学性能,通过XRD分析表明,所得材料具有层状α-NaFeO2结构。用透射电镜观察发现,通过碳表面处理可以产生清晰的界面。样品在0.1C,电压2.5～4.8V下充放电70次后发现电池容量可达～210（mA·h/g）左右,且循环结束后容量可保持在86%左右。
The Li（1.2）Fe（0.052）Ni（0.078）Co（0.13）Mn（0.54）O2 cathode material with MnO2 as template shows excellent electrochemical performance by carbon surface treatment and moderate iron ion replacement of nickel ions.XRD analysis shows that the obtained materials have a layeredα-NaFeO2 structure.Meanwhile,the transmission electron microscopy confirms that a clear boundary can be seen due to the carbon surface treatment.The sample delivers a discharge capacity of 210（mA·h/g）at 0.1 Crate and the capacity retention rate is about 86% after 50 cycles between 2.5 and 4.8 V.
作者
徐宪堂
王瑞琦
王贺
常明宁
袁峰
徐胜
XUXian-tang,WANGRui-qi,WA NG H e,CHANG Ming-ning,YUAN Feng XU Sheng(College of Physics, Qingdao U n iv e rs i ty , Qingdao 266071, Chin)
出处
《青岛大学学报（自然科学版）》
CAS
2018年第1期29-34,39,共7页
Journal of Qingdao University(Natural Science Edition)
基金
国家自然科学基金（批准号：11547034,11647168）资助
关键词
锂离子电池
阴极材料
碳表面处理
空心球壳结构
lithium- ion batter ies
cathodes m ate r ia l
hollow microspheres
carbon surfacemodified
