期刊
ELECTROCHIMICA ACTA
卷 211, 期 -, 页码 822-831出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.06.110
关键词
Lithium ion battery; Cathode material; Surface modification; Li2TiO3
资金
- National Basic Research Program of China (973 Program) [2014CB643406]
- Fundamental Research Funds of Central South University [2015zzts032, ZY2015631]
The cycling performance of LiNi0.8Co0.1Mn0.1O2 has been effectively enhanced by Li2TiO3 thin film coating. The Li2TiO3 coating layer with an average thickness of 1 nm has been proved by XRD, HRTEM, FFT and XPS. Compared with the 80.5% capacity retention of bare materials, the modified LiNi0.8Co0.1Mn0.1O2 materials Exhibit 98% capacity retention after 170 cycles at 1C rate. The reason for the improved cycling performance of LiNi0.8Co0.1Mn0.1O2 is due to the surface layer of Li2TiO3, which suppresses the direct contact between the active materials and the electrolytes, enhances the lithium ion diffusion between the electrode/electrolyte interface, and prevents the pulverization of the active materials during repeated charging/discharging. (C) 2016 Elsevier Ltd. All rights reserved.
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