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Moving beyond 99.9% Coulombic efficiency for lithium anodes in liquid electrolytes

Author

Listed:
  • Gustavo M. Hobold

    (Massachusetts Institute of Technology)

  • Jeffrey Lopez

    (Massachusetts Institute of Technology)

  • Rui Guo

    (Massachusetts Institute of Technology)

  • Nicolò Minafra

    (Massachusetts Institute of Technology)

  • Abhik Banerjee

    (University of California San Diego
    TCG Centres for Research and Education in Science and Technology (TCG CREST))

  • Y. Shirley Meng

    (University of California San Diego)

  • Yang Shao-Horn

    (Massachusetts Institute of Technology
    Massachusetts Institute of Technology
    Massachusetts Institute of Technology)

  • Betar M. Gallant

    (Massachusetts Institute of Technology)

Abstract

As Li-ion battery costs decrease, energy density and thus driving range remains a roadblock for mass-market vehicle electrification. While Li-metal anodes help achieve Department of Energy targets of 500 Wh kg−1 (750 Wh l−1), Li Coulombic efficiencies fall below the 99.95+% required for 1,000+ cycles. Here we examine historical electrolyte developments underlying increased Coulombic efficiency and discuss emerging frameworks that support rational strategies to move beyond 99.9%. While multiple electrolytes reach 98–99% Coulombic efficiency over subsets of cycles, achieving >99.9% Coulombic efficiency consistently throughout cycling is an as yet unmet challenge. We analyse important interplays between electrolyte, solid electrolyte interphase composition, plating–stripping kinetics and Li morphology, many of which are only recently being quantified experimentally at the Li interface, and which collectively determine Coulombic efficiency. We also discuss forward-looking strategies that, if mastered, represent new opportunities to refine understanding and support new record values of Coulombic efficiency in the coming years.

Suggested Citation

  • Gustavo M. Hobold & Jeffrey Lopez & Rui Guo & Nicolò Minafra & Abhik Banerjee & Y. Shirley Meng & Yang Shao-Horn & Betar M. Gallant, 2021. "Moving beyond 99.9% Coulombic efficiency for lithium anodes in liquid electrolytes," Nature Energy, Nature, vol. 6(10), pages 951-960, October.
  • Handle: RePEc:nat:natene:v:6:y:2021:i:10:d:10.1038_s41560-021-00910-w
    DOI: 10.1038/s41560-021-00910-w
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    Cited by:

    1. Chengbin Jin & Yiyu Huang & Lanhang Li & Guoying Wei & Hongyan Li & Qiyao Shang & Zhijin Ju & Gongxun Lu & Jiale Zheng & Ouwei Sheng & Xinyong Tao, 2023. "A corrosion inhibiting layer to tackle the irreversible lithium loss in lithium metal batteries," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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