文献类型：期刊文献

英文题名：Al2O3-coated Li1.2Mn0.54Ni0.13Co0.13O2 nanotubes as cathode materials for high-performance lithium-ion batteries

作者：Chen, Yangwen[1,2];Wang, Xinchang[1];Zhang, Jiajia[1,2];Chen, Baiyuan[3];Xu, Junmin[1];Zhang, Sen[1];Zhang, Liwei[2]

第一作者：Chen, Yangwen

通讯作者：Wang, XC[1];Zhang, LW[2]

机构：[1]Zhengzhou Univ, Sch Phys & Engn, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;[2]Xinxiang Univ, Phys & Elect Engn Dept, Xinxiang 453000, Peoples R China;[3]Jiangxi Jinhui Lithium Elect Mat CO LTD, Fuzhou 336000, Fujian, Peoples R China

第一机构：Zhengzhou Univ, Sch Phys & Engn, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China

通讯机构：[1]corresponding author), Zhengzhou Univ, Sch Phys & Engn, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;[2]corresponding author), Xinxiang Univ, Phys & Elect Engn Dept, Xinxiang 453000, Peoples R China.|[110717]新乡学院物理与电子工程学院;[11071]新乡学院;

年份：2019

卷号：9

期号：4

起止页码：2172-2179

外文期刊名：RSC ADVANCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000457783900048)】；

基金：The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 51802288), the China Postdoctoral Science Foundation (No. 2017M622369) and the Key Projects of Higher Education in Henan Province (No. 18A140008).

语种：英文

外文关键词：Alumina - Aluminum oxide - Cathodes - Diffusion coatings - Lithium compounds - Manganese compounds - Nanotubes - Nickel compounds

摘要：Li-rich manganese-based layered cathode Li1.2Mn0.54Ni0.13Co0.13O2 (LMNCO) nanotubes are synthesized by electrospinning and surface coated with different amounts of amorphous Al2O3. The effects of the coating content of Al2O3 on the structural and electrochemical performances of LMNCO nanotubes are investigated systematically. The results show that the morphologies and structures of the samples exhibit no apparent changes after being coated with Al2O3. Electrochemical tests indicate that the Al2O3-coated LMNCO nanotubes exhibit obviously enhanced electrochemical performances. The initial coulombic efficiency of surface modified LMNCO nanotubes increased from 74.9% to 85.2%, and the modified LMNCO nanotubes have a high capacity retention of 97.6% after 90 cycles at 1C. The improved electrochemical performances of the coated samples are attributed to the protective function of the uniform Al2O3 coating and the three-dimensional Li+ diffusion channel in the spinel interface layer.