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Ag-functionalized exfoliated V2O5 nanosheets: a flexible and binder-free cathode for lithium-ion batteries

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Abstract

Problems associated with seeking the high-performance flexible cathode materials similar to graphene constitute one of the main obstacles to using lithium-ion batteries (LIBs) in next-generation flexible and wearable electronics. Herein, the bendable and self-standing electrodes based on Ag nanoparticles decorated on few-layers V2O5 nanosheets are successfully fabricated by simple liquid-phase exfoliation and sol-gel method. Exfoliated V2O5 nanosheets with few-layers achieve higher Li+ ions diffusion kinetics derived from faster Li+ transport along the b-axis in the layers. Besides, Ag-functionalized ultrathin V2O5 nanosheets, as a flexible electrode of LIBs, exhibit higher electronic conductivity, superior discharge capacity (301 mA h g−1 at 1 C) and better rate performance (128 mA h g−1 at 10 C). Benefiting from the homogeneous dispersion of Ag nanoparticles and excellent flexibility of V2O5 nanosheets, after 100 times of 180° bending, the capacity of Ag@V2O5 nanosheets can stabilize at 233 mA h g−1 after the 200th cycle.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China [51506155], Applied Basic Research Program of Wuhan [2016010101010020]. Thanks for the measurements supporting from Center for Materials Research and Analysis at Wuhan University of Technology (WUT).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, People’s Republic of China

    Yanyuan Qi, Kaiyan Qin, Zelang Jian, Xue Yang, Wei Jin, Yuxuan Tan, Yujie Zou & Wen Chen

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  1. Yanyuan Qi
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  2. Kaiyan Qin
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  3. Zelang Jian
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  8. Wen Chen
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Correspondence to Wen Chen.

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Qi, Y., Qin, K., Jian, Z. et al. Ag-functionalized exfoliated V2O5 nanosheets: a flexible and binder-free cathode for lithium-ion batteries. J Mater Sci 54, 12713–12722 (2019). https://doi.org/10.1007/s10853-019-03806-z

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