The paper on self-discharge measurements was published in August in Journal of The Electrochemical Society under the title „Transient Self-Discharge after Formation in Lithium-Ion Cells: Impact of State-of-Charge and Anode Overhang“.
During the production of lithium-ion batteries, the self-discharge of new cells is measured to control the quality of the cells and to detect defects. However, measuring the self-discharge of new cells is a time-consuming process step and usually takes two to four weeks. Faster determination of cell quality is challenging due to transient effects triggered by the initial electrochemical activation of the cells, called formation. In this paper, the influence of the state-of-charge and the anode dimension on the transient self-discharge behavior is investigated and explained.