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Double carbon-embedded Na3V2(PO4)3 as a superior anode for sodium ion batteries

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Abstract

Double carbon-embedded Na3V2(PO4)3 (DC-NVP) nanocomposites were prepared via in situ growth of NVP@C nanoparticles on carbon nanotubes (CNTs). Beneficial of a high electronic conductivity network and structure stability, the DC-NVP nanocomposite as an anode of sodium ion batteries (SIBs) reveals outstanding electrochemical properties, delivering ultra-long cycle life with a first charge capacity of 78 mA h g−1 at 50 C and a capacity loss of 0.006%/cycle over 8000 cycles. The NVP//NVP full cells, fabricated by the DC-NVP nanocomposites as bipolar electrode, exhibit a discharge capacity of 72.1 mA h g−1 at 20 C after 5000 cycles and a corresponding capacity retention of 81%. The remarkable performance of DC-NVP nanocomposites is ascribed to that of the unique double carbon-embedded nanostructure, which possesses good electronic conductivity, larger electrode-electrolyte contact area, fast electron and ion transportation, and structural stability.

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Funding

This work was funded by the National Natural Science Foundation of China (51661009), the Natural Science Foundation of Guangxi Province (2019GXNSFDA245014 and 2016GXNSFGA380001), the Guangxi Key Laboratory of Information Materials (Project No. 171006-Z), and the Talents Project of Guilin University of Electronic Technology.

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Correspondence to Wen-Bin Luo or Jianqiu Deng.

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Li, M., Zhang, Q., Zuo, Z. et al. Double carbon-embedded Na3V2(PO4)3 as a superior anode for sodium ion batteries. J Nanopart Res 22, 151 (2020). https://doi.org/10.1007/s11051-020-04853-3

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  • DOI: https://doi.org/10.1007/s11051-020-04853-3

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