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A Liquid Inorganic Electrolyte Showing an Unusually High Lithium Ion Transference Number: A Concentrated Solution of LiAlCl 4 in Sulfur Dioxide

Author

Listed:
  • Robert Hartl

    (Workgroup Electrochemistry and Electrolytes, Institute of Theoretical and Physical Chemistry, University of Regensburg, 93040 Regensburg, Germany)

  • Matthias Fleischmann

    (Institute of Organic Chemistry, University of Regensburg, 93040 Regensburg, Germany)

  • Ruth M. Gschwind

    (Institute of Organic Chemistry, University of Regensburg, 93040 Regensburg, Germany)

  • Martin Winter

    (Electrochemical Energy Technology (MEET) Battery Research Center, Institute of Physical Chemistry, University of Münster, Corrensstr. 46, 48149 Münster, Germany)

  • Heiner Jakob Gores

    (Electrochemical Energy Technology (MEET) Battery Research Center, Institute of Physical Chemistry, University of Münster, Corrensstr. 46, 48149 Münster, Germany)

Abstract

We report on studies of an inorganic electrolyte: LiAlCl 4 in liquid sulfur dioxide. Concentrated solutions show a very high conductivity when compared with typical electrolytes for lithium ion batteries that are based on organic solvents. Our investigations include conductivity measurements and measurements of transference numbers via nuclear magnetic resonance (NMR) and by a classical direct method, Hittorf’s method. For the use of Hittorf’s method, it is necessary to measure the concentration of the electrolyte in a selected cell compartment before and after electrochemical polarization very precisely. This task was finally performed by potentiometric titration after hydrolysis of the salt. The Haven ratio was determined to estimate the association behavior of this very concentrated electrolyte solution. The measured unusually high transference number of the lithium cation of the studied most concentrated solution, a molten solvate LiAlCl 4 × 1.6SO 2 , makes this electrolyte a promising alternative for lithium ion cells with high power ability.

Suggested Citation

  • Robert Hartl & Matthias Fleischmann & Ruth M. Gschwind & Martin Winter & Heiner Jakob Gores, 2013. "A Liquid Inorganic Electrolyte Showing an Unusually High Lithium Ion Transference Number: A Concentrated Solution of LiAlCl 4 in Sulfur Dioxide," Energies, MDPI, vol. 6(9), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:6:y:2013:i:9:p:4448-4464:d:28404
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    Cited by:

    1. Feng Qi & Fushuan Wen & Xunyuan Liu & Md. Abdus Salam, 2017. "A Residential Energy Hub Model with a Concentrating Solar Power Plant and Electric Vehicles," Energies, MDPI, vol. 10(8), pages 1-17, August.

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