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Towards Li-ion batteries operating at 80 °C: Ionic liquid versus conventional liquid electrolytes
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
Department of Physics, Chalmers University .
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
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(English)In: BatteriesArticle in journal (Refereed) Accepted
Abstract [en]

Li-ion battery (LIB) full cells comprising TiO2-nanotube(TiO2-nt) and LiFePO4 (LFP) electrodes and either aconventional organic solvent based liquid electrolyte or an ionic liquid basedelectrolyte have been cycled at 80 °C. While the cell containing the ionicliquid based electrolyte exhibited good capacity retention and rate capabilityduring 100 cycles, rapid capacity fading was found for the corresponding cellwith the organic electrolyte. Results obtained for TiO2-nt and LFPhalf-cells indicate an oxidative degradation of the organic electrolyte at 80 °C.In all, ionic liquid based electrolytes can be used to significantly improvethe performance of LIBs operating at 80 °C.

Keyword [en]
ionic liquid, TiO2, nanotubes, batteries, electrolytes
National Category
Inorganic Chemistry Materials Chemistry
Research subject
Chemistry with specialization in Materials Chemistry; Chemistry with specialization in Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-336963OAI: oai:DiVA.org:uu-336963DiVA: diva2:1167794
Funder
Swedish Energy Agency, BatterifondenSwedish Foundation for Strategic Research , Road to LoadStandUp
Available from: 2017-12-19 Created: 2017-12-19 Last updated: 2017-12-30

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