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Defect-free potassium manganese hexacyanoferrate cathode material for high-performance potassium-ion batteries

Author

Listed:
  • Leqing Deng

    (Beihang University
    Beihang University)

  • Jiale Qu

    (Beihang University)

  • Xiaogang Niu

    (Beihang University)

  • Juzhe Liu

    (Beihang University)

  • Juan Zhang

    (Beihang University)

  • Youran Hong

    (Zhejiang University)

  • Meiying Feng

    (Beihang University)

  • Jiangwei Wang

    (Zhejiang University)

  • Miao Hu

    (CNOOC Research Institute of Refining and Petrochemicals)

  • Liang Zeng

    (Tianjin University)

  • Qianfan Zhang

    (Beihang University)

  • Lin Guo

    (Beihang University
    Beihang University)

  • Yujie Zhu

    (Beihang University
    Beihang University)

Abstract

Potassium-ion batteries (KIBs) are promising electrochemical energy storage systems because of their low cost and high energy density. However, practical exploitation of KIBs is hampered by the lack of high-performance cathode materials. Here we report a potassium manganese hexacyanoferrate (K2Mn[Fe(CN)6]) material, with a negligible content of defects and water, for efficient high-voltage K-ion storage. When tested in combination with a K metal anode, the K2Mn[Fe(CN)6]-based electrode enables a cell specific energy of 609.7 Wh kg−1 and 80% capacity retention after 7800 cycles. Moreover, a K-ion full-cell consisting of graphite and K2Mn[Fe(CN)6] as anode and cathode active materials, respectively, demonstrates a specific energy of 331.5 Wh kg−1, remarkable rate capability, and negligible capacity decay for 300 cycles. The remarkable electrochemical energy storage performances of the K2Mn[Fe(CN)6] material are attributed to its stable frameworks that benefit from the defect-free structure.

Suggested Citation

  • Leqing Deng & Jiale Qu & Xiaogang Niu & Juzhe Liu & Juan Zhang & Youran Hong & Meiying Feng & Jiangwei Wang & Miao Hu & Liang Zeng & Qianfan Zhang & Lin Guo & Yujie Zhu, 2021. "Defect-free potassium manganese hexacyanoferrate cathode material for high-performance potassium-ion batteries," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22499-0
    DOI: 10.1038/s41467-021-22499-0
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    Cited by:

    1. Chichu Qin & Dong Wang & Yumin Liu & Pengkun Yang & Tian Xie & Lu Huang & Haiyan Zou & Guanwu Li & Yingpeng Wu, 2021. "Tribo-electrochemistry induced artificial solid electrolyte interface by self-catalysis," Nature Communications, Nature, vol. 12(1), pages 1-11, December.

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