Cobalt-doped TaOCl3 nanoparticles/carbon compounds with advanced specific capacity for lithium-ion batteries

•Develop a simple and practical method for preparing nanoparticles.•Investigate different carbon materials as substrates and their effects on electrochemical performance.•Connect the volume expansion of the electrode material into the breakdown of the battery.•Study the effect of pseudocapacitance,...

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Bibliographic Details
Published in:Journal of alloys and compounds 2022-03, Vol.897, p.163193, Article 163193
Main Authors: Liang, Fenghao, Jiang, Lei, Zhang, Zhe, Wu, Daoning, Li, Xiaochun, Han, Ning, Rui, Yichuan, Zhang, Wei, Tang, Bohejin
Format: Article
Language:English
Subjects:
Anodes
Carbon compounds
Co-CNT
Cobalt
Electrochemical analysis
Electrode materials
Electrodes
Lithium
Lithium-ion batteries
Materials selection
Nanoparticles
Rechargeable batteries
Structural stability
TaOCl3 nanoparticle
Transition metals
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Summary:•Develop a simple and practical method for preparing nanoparticles.•Investigate different carbon materials as substrates and their effects on electrochemical performance.•Connect the volume expansion of the electrode material into the breakdown of the battery.•Study the effect of pseudocapacitance, current density and resistance on electrode performance. [Display omitted] Transition metal oxychlorides, such as VOCl and BiOCl, have become an attractive candidate material for lithium-ion batteries (LIBs). In this paper, the TaOCl3/Co-CNT was obtained by a non-hydrosol gel method, which used for lithium-ion anode materials. Pure TaOCl3 possesses a higher theoretical capacity, but the expected effect would not be obtained due to the volume expansion. The introduction of Co-CNT enhances the stability of the structure, shortens the Li+ transmission distance, and introduces conductive metal cobalt, which improves the electrochemical performance of the electrode material. TaOCl3/Co-CNT, as the anode electrode, exhibits superb electrochemical properties, including a high reversible specific capacity of 1295 mA h g−1 at 100 mA g−1, the perfect cycle stability (the capacity of TaOCl3/Co-CNT electrode achieved 650 mA h g−1 at 500 mA g−1 after 200 cycles) and the excellent rate performance. The results confirm that this product combined with facile fabrication process is promising for the practical applications in LIBs.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2021.163193