Physical, chemical, and mechanical degradation refers to the phenomenon of multi-mechanism performance attenuation caused by the coupling of electrochemical reactions, material stress changes, and structural deformation during the charging and discharging cycles and aging process of lithium-ion batteries. This type of degradation mechanism often leads to a decrease in battery capacity, an increase in internal resistance, and a reduction in safety, which is a key issue in the life management of lithium batteries and material design.
