Study of PCL mechanism Influence of grid/PAM state on PCL

摘要

Basic studies to clarify the premature capacity loss (PCL) mechanism have been carried out. It was found that PCL is a phenomenon due to the increase of positive plate resistance, especially the interfacial resistance between the positive grid and the positive active material (PAM) by PbSO_4 formation in the corrosion layer. PCL occurred when the adhesion between the grid and the PAM was poor, H_2SO_4 concentration at the interface between the grid and the PAM is high and the corrosion layer mainly consisted of β-PbO_2.