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Structure and compatibility of a magnesium electrolyte with a sulphur cathode

Author

Listed:
  • Hee Soo Kim

    (Toyota Research Institute of North America, 1555 Woodridge Avenue, Ann Arbor, Michigan 48105, USA.)

  • Timothy S. Arthur

    (Toyota Research Institute of North America, 1555 Woodridge Avenue, Ann Arbor, Michigan 48105, USA.)

  • Gary D. Allred

    (Synthonix)

  • Jaroslav Zajicek

    (University of Notre Dame)

  • John G. Newman

    (Evans Analytical Group)

  • Alexander E. Rodnyansky

    (Evans Analytical Group)

  • Allen G. Oliver

    (University of Notre Dame)

  • William C. Boggess

    (University of Notre Dame)

  • John Muldoon

    (Toyota Research Institute of North America, 1555 Woodridge Avenue, Ann Arbor, Michigan 48105, USA.)

Abstract

Magnesium metal is an ideal rechargeable battery anode material because of its high volumetric energy density, high negative reduction potential and natural abundance. Coupling Mg with high capacity, low-cost cathode materials such as electrophilic sulphur is only possible with a non-nucleophilic electrolyte. Here we show how the crystallization of the electrochemically active species formed from the reaction between hexamethyldisilazide magnesium chloride and aluminum trichloride enables the synthesis of a non-nucleophilic electrolyte. Furthermore, crystallization was essential in the identification of the electroactive species, [Mg2(μ-Cl)3·6THF]+, and vital to improvements in the voltage stability and coulombic efficiency of the electrolyte. X-ray photoelectron spectroscopy analysis of the sulphur electrode confirmed that the electrochemical conversion between sulphur and magnesium sulfide can be successfully performed using this electrolyte.

Suggested Citation

  • Hee Soo Kim & Timothy S. Arthur & Gary D. Allred & Jaroslav Zajicek & John G. Newman & Alexander E. Rodnyansky & Allen G. Oliver & William C. Boggess & John Muldoon, 2011. "Structure and compatibility of a magnesium electrolyte with a sulphur cathode," Nature Communications, Nature, vol. 2(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:2:y:2011:i:1:d:10.1038_ncomms1435
    DOI: 10.1038/ncomms1435
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    Cited by:

    1. Krzysztof Siczek, 2022. "Life-Related Hazards of Materials Applied to Mg–S Batteries," Energies, MDPI, vol. 15(4), pages 1-44, February.
    2. Chao Ye & Huanyu Jin & Jieqiong Shan & Yan Jiao & Huan Li & Qinfen Gu & Kenneth Davey & Haihui Wang & Shi-Zhang Qiao, 2021. "A Mo5N6 electrocatalyst for efficient Na2S electrodeposition in room-temperature sodium-sulfur batteries," Nature Communications, Nature, vol. 12(1), pages 1-11, December.

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