期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 882, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.160715
关键词
Core-shell; Nanostructures; Encapsulation; Conductive polymer; Anode; LIBs
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea [20194030202320]
- Mid-career Researcher Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2019R1A2C2086747]
The research found that the TiO2 active material with a conductive polymer coating has a higher reversible specific capacity and better electrode integrity, improving the rate performance and cycling stability of rechargeable lithium-ion batteries.
We investigated the effect of a conductive polymer coating on an active material. TiO2-capped conductive polymer (TOCP) is prepared using a simple and effective two-step process, which comprised hydrothermal and polymerization techniques. Structural analysis showed that the as-prepared pristine titanium oxide electrode material prescribed to the rutile phase TiO2. High-resolution field-emission transmission electron microscopy confirmed that the composite electrode material comprised a thin, uniform, and nano-sized polypyrrole layer coated on TiO2. The TOCP core-shell nanostructure exhibited a high reversible specific capacity of 348/318 mAh g(-1), which was considerably higher than that of the pristine TiO2 (TO) nanostructure. At a high current density, its specific capacity was 206/205 mAh g(-1), which indicated the material's high integrity. A combination of large surface area and high porosity could facilitate fast ion/electrode transport, and the electrode active material integrity screening the excellence in rate capability and long-term cyclic stability in rechargeable lithium-ion batteries. (C) 2021 Elsevier B.V. All rights reserved.
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