Degradation analysis of commercial lithium-ion batteries

According to the characteristics of voltage, capacity and resistance during the charge/discharge process of commercial mobile telephone lithium-ion batteries, the degradation analysis and associated mechanisms are put forward and discussed. Results shows the phase change of electrode materials or the swell and shrink of crystal lattice, the decomposing of electrolyte, the dissolving of active materials and the SEI film formation are the major causes leading to the capacity degradation.