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Expanded K 0.37 Fe 0.04 Al 0.07 Mn 0.89 O 2 Layered Material as a High-Performance Cathode in Sodium-Ion Batteries

Author

Listed:
  • Pan Ning

    (College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China)

  • Xinbin Mao

    (College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China)

  • Li Zhou

    (College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China)

  • Hongrui Wang

    (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China)

  • Feng Zhang

    (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China)

  • Congshan Zhou

    (College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China)

  • Bei Long

    (School of Chemistry, Xiangtan University, Xiangtan 411105, China)

  • Yuping Wu

    (School of Energy and Environment, Southeast University, Nanjing 211189, China)

  • Xiongwei Wu

    (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China)

Abstract

Due to a high operating voltage and theoretical capacity, P2-type layered Mn-based metal oxides are considered to be promising cathodes in sodium-ion batteries, but their poor structural stability in the process of Na + insertion/deinsertion severely hinders their practical application. Here, an interesting K + pre-intercalation is used to expand the interlayer distance and enhance the electrochemical reversibility of K s Fe x Al y Mn z O 2 . With a suitable K + content, the optimized electrode shows a high specific capacity of 135 mAh g −1 at 0.1 C, a good rate capability of 80 mAh g −1 at 5 C and an excellent cycling performance of 76.4% capacity retention after 200 cycles at a high rate of 5 C. This work proves the feasibility of a K + pre-intercalation strategy in a P2-type layered cathode.

Suggested Citation

  • Pan Ning & Xinbin Mao & Li Zhou & Hongrui Wang & Feng Zhang & Congshan Zhou & Bei Long & Yuping Wu & Xiongwei Wu, 2022. "Expanded K 0.37 Fe 0.04 Al 0.07 Mn 0.89 O 2 Layered Material as a High-Performance Cathode in Sodium-Ion Batteries," Energies, MDPI, vol. 15(15), pages 1-7, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:15:p:5659-:d:880165
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    References listed on IDEAS

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    1. Ying Ching Lu & Nikolay Dimov & Shigeto Okada & Thi Hang Bui, 2018. "SnSb Alloy Blended with Hard Carbon as Anode for Na-Ion Batteries," Energies, MDPI, vol. 11(6), pages 1-10, June.
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