65057 2025 eng lecture 0 -- -- -- Lithium-iron-phosphate (LFP) and sodium-ion batteries (SIBs) offer safe and cost-effective options for energy storage. In this study, the effects of continuous electrical stress, including high current loads and overdischarge, during cyclic ageing are investigated by tracing capacity loss and Coulombic efficiency during cycling of both cell types. Additionally, differential voltage analysis of pseudo open-circuit voltage discharges is utilised for degradation mode analysis. The results show that electrical stress accelerates degradation in both LFPs and SIBs, with high current rates potentially triggering plating or even cell failure in SIBs. Overdischarging primarily intensifies ageing by promoting accelerated solid electrolyte interphase growth. Doktorandenseminar der Technischen Universität Berlin Berlin, Germany 29.09.2025 29.09.2025 0 publish false true Philippa Scharpmann eng uncontrolled Lithium-ion -batteries eng uncontrolled Sodium-ion-batteries eng uncontrolled Electrical stress eng uncontrolled Differential voltage analysis eng uncontrolled Plating Angewandte Physik 3 Gefahrgutumschließungen; Energiespeicher 3.1 Sicherheit von Gefahrgutverpackungen und Batterien Energie Elektrische Energiespeicher und -umwandlung Datei im Netzwerk der BAM verfügbar ("Closed Access") Präsentation