Dresden 2026 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 19: Poster Session

MM 19.13: Poster

Tuesday, March 10, 2026, 18:00–20:00, P5

Separating light and heat effects in the electrochemical performance ofilluminated V₂O₅ lithium-ion battery cells — •Pavel Rozov¹, Tom Wickenhäuser¹, Luca Bischof¹, Ewa Mijowska², and Rüdiger Klingeler¹ — ¹Kirchhoff Institute for Physics, Heidelberg University, Germany — ²Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Poland

Recent studies have demonstrated that lithium-ion batteries can exhibit enhanced electrochemical performance under optical light illumination. However, light exposure also may cause local heating, making it challenging to separate bare photonic and photo-thermal effects. Here, the effects of light illumination on V₂O₅-based electrodes as photoactive cathode material are studied in lithium metal half-cells in which photo-thermal effects are monitored by means of an in-situ Pt1000 thermometer. Our studies allow us to disentangle photonic and temperature effects. We find slightly enhanced Li+ diffusion under illumination but do not confirm significant light-induced enhancement of the battery performance beyond temperature effects which is reported in the literature.

Keywords: Lithium-ion batteries; Light-induced effects