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Batteries 2018, 4(1), 2; https://doi.org/10.3390/batteries4010002

Towards Li-Ion Batteries Operating at 80 °C: Ionic Liquid versus Conventional Liquid Electrolytes

1
Department of Chemistry—Ångström Laboratory, Uppsala University, Box 538, Uppsala SE-75121, Sweden
2
Department of Physics, Chalmers University of Technology, Göteborg SE-41296, Sweden
*
Author to whom correspondence should be addressed.
Received: 19 October 2017 / Revised: 20 November 2017 / Accepted: 24 November 2017 / Published: 2 January 2018
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Abstract

Li-ion battery (LIB) full cells comprised of TiO2-nanotube (TiO2-nt) and LiFePO4 (LFP) electrodes and either a conventional organic solvent based liquid electrolyte or an ionic liquid based electrolyte have been cycled at 80 °C. While the cell containing the ionic liquid based electrolyte exhibited good capacity retention and rate capability during 100 cycles, rapid capacity fading was found for the corresponding cell with the organic electrolyte. Results obtained for TiO2-nt and LFP half-cells indicate an oxidative degradation of the organic electrolyte at 80 °C. In all, ionic liquid based electrolytes can be used to significantly improve the performance of LIBs operating at 80 °C. View Full-Text
Keywords: Li-ion batteries; ionic liquid; elevated temperature Li-ion batteries; ionic liquid; elevated temperature
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Oltean, G.; Plylahan, N.; Ihrfors, C.; Wei, W.; Xu, C.; Edström, K.; Nyholm, L.; Johansson, P.; Gustafsson, T. Towards Li-Ion Batteries Operating at 80 °C: Ionic Liquid versus Conventional Liquid Electrolytes. Batteries 2018, 4, 2.

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