TY  - CONF
A1  - Scharpmann, Philippa
T1  - Exploring the effects of accelerated ageing on  lithium- and sodium-ion cells
N2  - 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.
T2  - Doktorandenseminar der Technischen Universität Berlin
CY  - Berlin, Germany
DA  - 29.09.2025
KW  - Lithium-ion -batteries
KW  - Sodium-ion-batteries
KW  - Electrical stress
KW  - Differential voltage analysis
KW  - Plating
PY  - 2025
AN  - OPUS4-65057
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -