Direct atomic-scale confirmation of three-phase storage mechanism in Li4Ti5 O12 anodes for room-temperature sodium-ion batteries

Yang Sun, Liang Zhao, Huilin Pan, Xia Lu, Lin Gu, Yong Sheng Hu, Hong Li, Michel Armand, Yuichi Ikuhara, Liquan Chen, Xuejie Huang

    研究成果: Article

    512 引用 (Scopus)

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    Room-temperature sodium-ion batteries attract increasing attention for large-scale energy storage applications in renewable energy and smart grid. However, the development of suitable anode materials remains a challenging issue. Here we demonstrate that the spinel Li4 Ti5 O 12, well-known as a 'zero-strain' anode for lithium-ion batteries, can also store sodium, displaying an average storage voltage of 0.91 V. With an appropriate binder, the Li4Ti5 O12 electrode delivers a reversible capacity of 155 mAh g -1 and presents the best cyclability among all reported oxide-based anode materials. Density functional theory calculations predict a three-phase separation mechanism, 2Li4 Ti 5 O 12+6Na + +6e - â†"Li7Ti5 O12 +Na 6 LiTi 5 O 12, which has been confirmed through in situ synchrotron X-ray diffraction and advanced scanning transmission electron microscope imaging techniques. The three-phase separation reaction has never been seen in any insertion electrode materials for lithium- or sodium-ion batteries. Furthermore, interfacial structure is clearly resolved at an atomic scale in electrochemically sodiated Li4Ti5 O12 for the first time via the advanced electron microscopy.

    元の言語English
    記事番号1870
    ジャーナルNature communications
    4
    DOI
    出版物ステータスPublished - 2013

    ASJC Scopus subject areas

    • Chemistry(all)
    • Biochemistry, Genetics and Molecular Biology(all)
    • Physics and Astronomy(all)

    フィンガープリント Direct atomic-scale confirmation of three-phase storage mechanism in Li<sub>4</sub>Ti<sub>5</sub> O<sub>12</sub> anodes for room-temperature sodium-ion batteries' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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    Sun, Y., Zhao, L., Pan, H., Lu, X., Gu, L., Hu, Y. S., Li, H., Armand, M., Ikuhara, Y., Chen, L., & Huang, X. (2013). Direct atomic-scale confirmation of three-phase storage mechanism in Li4Ti5 O12 anodes for room-temperature sodium-ion batteries. Nature communications, 4, [1870]. https://doi.org/10.1038/ncomms2878