期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 816, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152566
关键词
Lithium-ion batteries; Anode material; Co0.85Se; Ti(3)C(2)T(x)MXene; Volumetric capacity
资金
- National Natural Science Foundation of China [NSFC21576158, 21576159, 61604089]
- Natural Science Foundation of Shandong Province [ZR2017JL014, ZR2016AQ14]
- Taishan Scholar Foundation [tsqn201812063]
The volumetric capacity plays a critical role in lithium-ion batteries (LIBs) on account of the restrictive electrode material. Herein we report a novel electrode material of Co0.85Se@C/Ti3C2Tx MXene hybrids (CSTC5) with high volumetric capacities are prepared by ultrasonication of Ti3C2Tx MXene and Co0.85Se@C nanoparticles. These samples are systematically characterized by X-ray diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, and energy dispersive spectroscopy. The electrochemical performance of these samples as anode materials for LIBs are also studied. Owing to the opened two-dimensional structure, good electrochemical property, and weak Li+ diffusion resistance, these materials exhibit good electrochemical properties. The CSTC3 sample delivers the maximum reversible capacity, up to 700 mA h g(-1) at 0.1 A g(-1), corresponding to a very high volumetric capacity of 2044 mA h cm(-3) due to its high compact density. This hybrid is considered to be a promising anode material in small-size wearable or portable electronic devices. (C) 2019 Elsevier B.V. All rights reserved.
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