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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 16: Energy Storage Materials and Devices II

CPP 16.3: Vortrag

Montag, 9. März 2026, 18:00–18:15, ZEU/0260

Temperature effects on the electrochemical behavior of graphite cathodes for aluminium-polymer batteries — •Mohammad Mostafizar Rahman, Mohammad Jony Rana, Shuvrodev Biswas, Amir Mohammad, Hartmut Stöcker, and Dirk C. Meyer — Institute of Experimental Physics, TU Bergakademie Freiberg, Leipziger Str. 23, Freiberg, 09599, Germany

This study assesses the performance of Aluminium-polymer batteries at variable temperatures between −20 ^∘C and 80 ^∘C. Pouch cells were constructed utilizing a solid polymer electrolyte (SPE) coupled with two different types of graphite cathode: mesocarbon microbeads (MCMB) and spherical graphite (SpG). Cyclic voltammetry and galvanostatic cycling with potential limitation measurements were conducted at different temperatures combined with variable current densities (25...100 mA/g). The results reveal that the resistance degradation below 0 ^∘C is reversible, with performance being recovered when returning to positive temperatures. However, at moderately high temperatures above 60 ^∘C, the degradation becomes permanent. MCMB cells operate effectively between −10 ^∘C and 40 ^∘C, while SpG cells function from 0 ^∘C to 60 ^∘C. The capacity of MCMB cells peaks at 20 ^∘C at all current densities and then drops significantly at 60 ^∘C. In contrast, SpG cells exhibit their highest capacities at 40 ^∘C or 60 ^∘C, followed by a rapid decline. Together with the good Coulombic efficiencies >95 % both types of cells are proven suitable for varying environmental conditions.

Keywords: Al-polymer battery; High-low temperature; Solid polymer electrolyte; Low temperature reversibility