期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 800, 期 -, 页码 50-57出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.06.023
关键词
Micro-sized silicon; Lithium-ion battery; High-temperature environment; Diffusion coefficient; Capacitive contribution
资金
- National Key Research and Development Program of China [2018YFF0215502]
- National Natural Science Foundation of China [51873074]
- Department of Science and Technology of Guangdong [2018A050506005]
- Bureau of Science and Technology of Foshan Municipality [2016AG100522]
To address the shortcomings on high-rate and long-term existing in recent silicon/carbon materials as anode of Li-ion batteries, we have synthesized the silicon-cored particles wrapped with multiscale flexible carbon shell pillared by lithium titanate (assigned as Si@LTO@C). With a self-adaptive shell layer effectively against volume expansion of silicon upon lithiation/delithiation, Si@LTO@C renders a reversible capacity of 848 mA h g(-1) at a large current density of 15 A g(-1) after 1000 cycles under a high-temperature of 80 degrees C. Excellent electrochemical performance could be ascribed to a superiorly stable designed 3-demension structure and enhanced kinetics, which has been particular discussed. These conspicuous features undoubtedly enable Si@LTO@C composite to be a promising anode material for high-performance lithium-ion battery under harsh environment. (C) 2019 Elsevier B.V. All rights reserved.
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