Composite polymer electrolyte prepared by a dry/wet phase-inversion process

Composite polymer membranes for lithium-ion batteries were prepared by the dry/wet phase-inversion method. The effects of the different additives on the pore sizes and structures of the polymer membranes were analyzed by SEM and the uptake test. The electrochemical characteristics of the batteries assembled with membranes prepared in different conditions were tested. It is confirmed that the porous structure parameters such as the pore size, the pore distribution and the porosity are affected by the additions of the inorganic nano-fillers. The membranes filled with nano-materials show good pore structures that result in better recharge-discharge performances.