Abstract:

The rapid developments of electronic devices and electric vehicles have driven the ever increasing demands on high energy density energy storage system. Lithium-sulfur (Li-S) batteries have been strongly considered due to their high theoretical specific energy density, low cost of active materials, and excellent environmental benignity. However, the electrochemical performance of Li-S batteries suffers from a low coulombic efficiency, a rapid capacity degradation, and unstable anode-electrolyte interfaces, etc. The incorporation of rationally designed composite separator system is beneficial to mitigate these shortcomings towards the practical applications of Li-S batteries. In this contribution, the recent processes of composite separators with functional materials (such as carbon, polymer, inorganic compound, etc.) and novel structures were reviewed. The prospects for the development of separator in Li-S system are also involved.