期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 731, 期 -, 页码 636-645出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.09.341
关键词
Fluorine-doping; Al2O3 coating; Layered lithium-rich cathode materials; Lithium-ion batteries
资金
- National Science Foundation of China [61171008, 51502172]
- Shanghai Jubo Energy Technology Co., Ltd
- Yancheng Huanbo Energy Technology Co., Ltd.
Lithium-rich layered oxide materials (LLOs) are widely studied due to its high reversible capacity. However, the stability during cycling and initial coulombic efficiency should be improved. Herein, we applied ball milling based facile calcination modification methods by combining doping fluorine and coating with Al2O3 to synthesis modified Li[Li0.20Ni0.133Co0.133Mn0.534]O-2 cathode materials for lithium-ion batteries. Characterization results of XRD, SEM and TEM show that fluorine doping could largely stabilized materials structure. Al2O3 coating is proved to improve LLOs' stability during cycling. The formation of Al-F-O-H type species proved by X-ray photoelectron spectra lead to improved discharge capacity and cycle performance. This work provides insight on the cost-effective production of high quality LLOs and helps determine appropriate modifications to improve the commercial utilization of LLOs. (C) 2017 Published by Elsevier B.V.
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