A high-capacity, low-cost layered sodium manganese oxide material as cathode for sodium-ion batteries

Shaohua Guo, Haijun Yu, Zelang Jian, Pan Liu, Yanbei Zhu, Xianwei Guo, Mingwei Chen, Masayoshi Ishida, Haoshen Zhou

    Research output: Contribution to journalArticlepeer-review

    73 Citations (Scopus)

    Abstract

    A layered sodium manganese oxide material (NaMn3O5) is introduced as a novel cathode materials for sodium-ion batteries. Structural characterizations reveal a typical Birnessite structure with lamellar stacking of the synthetic nanosheets. Electrochemical tests reveal a particularly large discharge capacity of 219 mAh g-1 in the voltage rang of 1.5-4.7 V vs. Na/Na+. With an average potential of 2.75 V versus sodium metal, layered NaMn3O5 exhibits a high energy density of 602 Wh kg-1, and also presents good rate capability. Furthermore, the diffusion coefficient of sodium ions in the layered NaMn3O 5 electrode is investigated by using the galvanostatic intermittent titration technique. The results greatly contribute to the development of room-temperature sodium-ion batteries based on earth-abundant elements.

    Original languageEnglish
    Pages (from-to)2115-2119
    Number of pages5
    JournalChemSusChem
    Volume7
    Issue number8
    DOIs
    Publication statusPublished - 2014 Aug

    Keywords

    • cathodes
    • electrochemistry
    • energy storage
    • layered compounds
    • sodium-ion batteries

    ASJC Scopus subject areas

    • Environmental Chemistry
    • Chemical Engineering(all)
    • Materials Science(all)
    • Energy(all)

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