Hartl, Robert and Fleischmann, Matthias and Gschwind, Ruth M. and Winter, Martin and Gores, Heiner Jakob (2013) A Liquid Inorganic Electrolyte Showing an Unusually High Lithium Ion Transference Number: A Concentrated Solution of LiAlCl4 in Sulfur Dioxide. ENERGIES, 6 (9). pp. 4448-4464. ISSN 1996-1073,
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We report on studies of an inorganic electrolyte: LiAlCl4 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 LiAlCl4 x 1.6SO(2), makes this electrolyte a promising alternative for lithium ion cells with high power ability.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TEMPERATURE-DEPENDENCE; PROPYLENE CARBONATE; TRANSPORT-PROPERTIES; CONDUCTANCE; BATTERIES; ADDITIVES; VISCOSITY; APPARATUS; CHLORIDE; ENERGY; lithium ion transference number; lithium tetrachloroaluminate; sulfur dioxide; Hittorf's method; diffusion-ordered spectroscopy (DOSY)-NMR |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. Ruth Gschwind Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 Mar 2020 14:14 |
| Last Modified: | 31 Mar 2020 14:14 |
| URI: | https://pred.uni-regensburg.de/id/eprint/16075 |
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