The polyethylene (PE) based separator for lithium-ion rechargeable batteries has been investigated and compared with conventional triple layer (PP/PE/PP) Celgard 2340 separator using layered Li[Ni1/3Co1/3Mn1/3]O2 as a cathode material. The morphology, contact angle and electrochemical behavior of the 180% and 300% stretched PE separators were evaluated. The electrochemical result revealed that the initial discharge capacity of PE 180% and 300% stretched separator had 146.28 mAh/g and 133.43 mAh/g at C/5 rates, respectively. On the other hand, 300% stretched separator possesses better capacity retention ratio than the others and therefore demonstrated a good cycleability with less capacity fading than that of 180% stretched separator and conventional Celgard 2340 separator.

Keywords: Lithium-ion batteries, Separator, Microporous, Cathode material, Specific capacity