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Platelike CoO/carbon nanofiber composite electrode with improved electrochemical performance for lithium ion batteries

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Abstract

Platelike CoO/carbon nanofiber (CNF) composite materials with porous structures are synthesized from the thermal decomposition and recrystallization of β-Co(OH)2/CNF precursor without the need for a template or structure-directing agent. As negative electrode materials for lithium-ion batteries, the platelike CoO/CNF composite delivers a high reversible capacity of 700 mAh g−1 for a life extending over hundreds of cycles at a constant current density of 200 mA g−1. More importantly, the composite electrode shows significantly improved rate capability and electrochemical reversibility. Even at a current of 2 C, the platelike CoO/CNF composite maintain a capacity of 580 mAh g−1 after 50 discharge/charge cycles. The improved cycling stability and rate capability of the CoO/CNF composite electrodes may be attributed to synergistic effect of the porous structural stability and improved conductivity through CNF connection.

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Acknowledgements

The authors thank Prof. Jun Yang and Prof. Yanna Nuli (Shanghai Jiao Tong University) for their help with the electrochemical experiments and results discussion.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, 149 Yanchang Road, Shanghai, 200072, China

    Wenli Yao & Hongwei Cheng

  2. Jiangxi Research Institute of Tungsten and Rare Earths, Ganzhou, 341000, China

    Wenli Yao & Jinqing Chen

Authors
  1. Wenli Yao
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  2. Jinqing Chen
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  3. Hongwei Cheng
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Correspondence to Wenli Yao.

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Yao, W., Chen, J. & Cheng, H. Platelike CoO/carbon nanofiber composite electrode with improved electrochemical performance for lithium ion batteries. J Solid State Electrochem 15, 183–188 (2011). https://doi.org/10.1007/s10008-010-1084-y

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  • DOI: https://doi.org/10.1007/s10008-010-1084-y

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