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Wang F, Kim SW, Seo DH, et al. Ternary metal fluorides as high-energy cathodes with low cycling hysteresis. Nat Commun. 2015;6:6668doi: 10.1038/ncomms7668.
Wang, F., Kim, S. W., Seo, D. H., Kang, K., Wang, L., Su, D., Vajo, J. J., Wang, J., & Graetz, J. (2015). Ternary metal fluorides as high-energy cathodes with low cycling hysteresis. Nature communications, 66668. https://doi.org/10.1038/ncomms7668
Wang, Feng, et al. "Ternary metal fluorides as high-energy cathodes with low cycling hysteresis." Nature communications vol. 6 (2015): 6668. doi: https://doi.org/10.1038/ncomms7668
Wang F, Kim SW, Seo DH, Kang K, Wang L, Su D, Vajo JJ, Wang J, Graetz J. Ternary metal fluorides as high-energy cathodes with low cycling hysteresis. Nat Commun. 2015 Mar 26;6:6668. doi: 10.1038/ncomms7668. PMID: 25808876; PMCID: PMC4389236.
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Nat Commun. 2015 Mar 26;6:6668. doi: 10.1038/ncomms7668.

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

Nature communications

Feng Wang, Sung-Wook Kim, Dong-Hwa Seo, Kisuk Kang, Liping Wang, Dong Su, John J Vajo, John Wang, Jason Graetz

Affiliations

  1. Sustainable Energy Technologies Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  2. 1] Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 151-742, Republic of Korea [2] Center for Nanoparticle Research, Institute for Basic Science, Seoul National University, Seoul 151-742, Republic of Korea.
  3. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA.
  4. Sensors and Materials Laboratory, HRL Laboratories, LLC, Malibu, California 90265, USA.
  5. 1] Sustainable Energy Technologies Department, Brookhaven National Laboratory, Upton, New York 11973, USA [2] Sensors and Materials Laboratory, HRL Laboratories, LLC, Malibu, California 90265, USA.

PMID: 25808876 PMCID: PMC4389236 DOI: 10.1038/ncomms7668

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 (M(1)yM(2)(1-y)F(x): M(1), M(2) = Fe, Cu), which may overcome these issues. By substituting Cu into the Fe lattice, forming the solid-solution Cu(y)Fe(1-y)F(2), reversible Cu and Fe redox reactions are achieved with surprisingly small hysteresis (<150 mV). This finding indicates that cation substitution may provide a new avenue for tailoring key electrochemical properties of conversion electrodes. Although the reversible capacity of Cu conversion fades rapidly, likely due to Cu(+) dissolution, the low hysteresis and high energy suggest that a Cu-based fluoride cathode remains an intriguing candidate for rechargeable lithium batteries.

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