Berlin 2018 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 27: Poster Session I

MM 27.16: Poster

Tuesday, March 13, 2018, 18:30–19:45, Poster E

Microcalorimetric study of aluminum depositon/dissolution in BMIMCl/aluminium chloride ionic liquid — •junjie xu and rolf schuster — Institute of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2 76131 Karlsruhe

Ionic liquid systems, such as a mixture of 1-Butyl-3-methylimidazolium chloride (BMIMCl) and aluminium chloride, are promising electrolytes for aluminum batteries. In order to improve the performance of aluminum batteries, knowledge of thermodynamic properties of the electrochemical processes is required. In this study, we measured the Peltier heat of the aluminum deposition/dissolution reaction ( about 10 kJ/mol at a molar ratio of BMIMCl to aluminium chloride of 1:1.7) with microcalorimetry. The positive Peltier heat corresponds to warming of the electrodes during the aluminum dissolution reaction. Consequences for the aluminum dissolution process in batteries will be discussed.