期刊
ELECTROCHIMICA ACTA
卷 193, 期 -, 页码 45-53出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.02.043
关键词
Layered lithium-rich oxide; Li-Rich@AlF3; Li-Rich@AlF3@Graphene; Lithium ion battery
资金
- National Natural Science Foundation [21273084]
- National Natural Science Foundation of China
- Natural Science Foundation of Guangdong Province [U1134002]
- key project of Science and Technology in Guangdong Province [2015B010116002]
- Innovative Platform of Guangzhou Municipality [201509030005]
- scientific research project of Department of Education of Guangdong Province [2013CXZDA013]
- Scientific Research Foundation of Graduate School of South China Normal University [2015lkxm09]
A novel composite of layered lithium-rich oxide with AlF3 and graphene, Li-Rich@AlF3@Graphene, is synthesized as high performance cathode of lithium ion battery in terms of rate capability and cyclic stability. Physical characterizations from X-ray diffraction, scanning electron microscope and transmission electron microscope, demonstrate that the layered lithium-rich oxide in Li-Rich@AlF3@Graphene is composed of uniform nanoparticles of 100 nm, which are coated with a layer of 2 nm AlF3 and wrapped with graphene sheets. Charge/discharge tests indicate that the naked lithium-rich oxide exhibits poor cyclic stability and rate capability as cathode of lithium ion battery, which can be improved to some extent by the only contribution of AlF3 but significantly by the concurrent contribution of AlF3 and graphene. (C) 2016 Elsevier Ltd. All rights reserved.
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