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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 1: Energy Storage and Batteries I
CPP 1.6: Talk
Monday, March 18, 2024, 11:00–11:15, H 0106
Ionic polymer electrolyte for aluminium batteries — •Amir Mohammad, Thomas Köhler, Shuvrodev Biswas, Hartmut Stöcker, and Dirk C. Meyer — Institute of Experimental Physics, TU Bergakademie Freiberg, Germany
Rechargeable aluminium batteries are considered a promising alternative to lithium-based energy storage systems, but their widespread use is hindered by challenges in the electrolyte system, such as leakage and corrosion. This necessitates the use of expensive metal foils (e.g. Mo, Ta, W) as current collectors on the cathode side. However, a new ionic polymer electrolyte has been developed that offers significant improvements in performance, safety, and cost efficiency. The manufacturing process involves the complexation of polyamide-6 (PA6) with aluminium chloride (AlCl3) and the organic salt triethylamine hydrochloride (Et3NHCl), allowing for the dissolution of up to 20 % PA6 in the sample.
This results in good mechanical properties and a stable electrode-electrolyte interface without compromising the cell performance. The ionic polymer electrolyte does not require separators, has a high ionic conductivity of up to 0.3 mScm−1, and can effectively dissolve and deposit aluminium electrochemically. This innovation has the potential to replace expensive metal current collectors by affordable aluminium foils with protective coatings. The solid ionic polymer presented here is a promising and robust strategy for the development of stable, safe, flexible, and yet inexpensive aluminium batteries.
Keywords: Aluminium batteries; Energy storage; Polymer electrolyte