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Ternary metal fluorides as high-energy cathodes with low cycling hysteresis

Author

Listed:
  • Feng Wang

    (Brookhaven National Laboratory)

  • Sung-Wook Kim

    (Brookhaven National Laboratory
    Present address: Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute, Daejeon 305-353, Republic of Korea)

  • Dong-Hwa Seo

    (Research Institute of Advanced Materials, Seoul National University
    Center for Nanoparticle Research, Institute for Basic Science, Seoul National University
    Present address: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA)

  • Kisuk Kang

    (Research Institute of Advanced Materials, Seoul National University
    Center for Nanoparticle Research, Institute for Basic Science, Seoul National University)

  • Liping Wang

    (Brookhaven National Laboratory)

  • Dong Su

    (Center for Functional Nanomaterials, Brookhaven National Laboratory)

  • John J. Vajo

    (Sensors and Materials Laboratory, HRL Laboratories, LLC)

  • John Wang

    (Sensors and Materials Laboratory, HRL Laboratories, LLC)

  • Jason Graetz

    (Brookhaven National Laboratory
    Sensors and Materials Laboratory, HRL Laboratories, LLC)

Abstract

Transition metal fluorides are an appealing alternative to conventional intercalation compounds for use as cathodes in next-generation lithium batteries due to their extremely high capacity (3–4 times greater than the current state-of-the-art). However, issues related to reversibility, energy efficiency and kinetics prevent their practical application. Here we report on the synthesis, structural and electrochemical properties of ternary metal fluorides (M1yM21-yFx: M1, M2=Fe, Cu), which may overcome these issues. By substituting Cu into the Fe lattice, forming the solid–solution CuyFe1-yF2, reversible Cu and Fe redox reactions are achieved with surprisingly small hysteresis (

Suggested Citation

  • Feng Wang & Sung-Wook Kim & Dong-Hwa Seo & Kisuk Kang & Liping Wang & Dong Su & John J. Vajo & John Wang & Jason Graetz, 2015. "Ternary metal fluorides as high-energy cathodes with low cycling hysteresis," Nature Communications, Nature, vol. 6(1), pages 1-9, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7668
    DOI: 10.1038/ncomms7668
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