What is function of separator in lithium ion battery? All Questions › Category: Electric Vehicle › What is function of separator in lithium ion battery? 1 Vote Up Vote Down chetan shidling asked 4 years ago Options: Separators help electrons to move. Separator isolated the positive and negative electrodes to avoid short circuits. Separator avoids self-discharge of the cell. Both b and c 1 Answers 0 Vote Up Vote Down chetan shidling answered 4 years ago The correct answer is both b and c.