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Superior Na-storage performance of Na 3 V 2 (PO 4 ) 3 /C-Ag composites as cathode material for Na-ion battery

Journal of Alloys and Compounds, ISSN: 0925-8388, Vol: 822, Page: 153587
2020
  • 27
    Citations
  • 0
    Usage
  • 12
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    27
    • Citation Indexes
      27
  • Captures
    12

Article Description

Na 3 V 2 (PO 4 ) 3 (NVP) is supposed to be a generation cathode material for sodium-ion batteries due to its unique 3D channel structure and remarkable thermal stability. But its poor electronic conductivity partly impedes their electrochemical performance. Herein, a sequence of Na 3 V 2 (PO 4 ) 3 /C-Ag ( NVP/C-Ag ) samples were manufactured via a traditional one-step solid-state process to alleviate this problem. The results reveal that NVP/C-Ag-2 sample possesses minimum charge-transfer resistance and maximum ion diffusion coefficient, and thus has satisfactory electrochemical performance, with a capacity of 95 mA h/g at 10C and almost no capacity decay after 500 cycles. Even at 50C, it can reach a reversible specific capacity of 85 mA h/g. The results demonstrate that an appropriate ratio of silver and carbon acting cooperatively on the particles is a valid method to enhance the electrochemical property.

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