Aging study on twenty A123 18650 Graphite/LFP 1.1 Ah cells

Abstract The dataset gives a comprehensive data collection focusing on the ageing of twenty 18650 Graphite/LFP 1.1 Ah commercial cells in first and second life. The ageing from a pristine state up to 40 % of capacity loss is uncommon due to the extensive testing time required. Therefore, this new data collection provides insights on long-term ageing of lithium-ion batteries. The initial aim of the study was to comprehend the aging in first and second-life applications, with a special focus on the sudden acceleration of capacity loss that can occur after a long-term use. The ageing experiment was designed to assess the impact of various test conditions: electric vehicle use, high current charge and discharge, full or partial discharge and a reduced operating voltage window. The cells were characterised every 100 cycles to measure the remaining capacity and the pseudo-open-circuit-voltage. This dataset can help the research community in studying second-life applications or any other study on long-term ageing of Graphite/LFP batteries: new diagnosis and prognosis techniques, AI, battery modelling, and more. Data description For more information about the experiment and the dataset, please refer to the open-access data paper : Wheeler, W., Bultel, Y., Venet, P. et al. An ageing study of twenty 18650 lithium-ion Graphite/LFP cells in first and second life use. Sci Data 12, 392 (2025). https://doi.org/10.1038/s41597-025-04712-7.