Analysis and prediction of the open circuit potential of lithium-ion cells

► A model for the quantitative OCV analysis of Li-ion cells is introduced. ► In-situ diagnosis of aging mechanisms is experimentally verified. ► Loss of active lithium and contact loss of active material are separated. ► A novel model to describe the OCV of a blend cathode is introduced. ► The active masses of the blend components are determined using the OCV model.