Study on Separator / Lithium Metal Integration for Improving Performance of Lithium Metal Battery

Abstract

Recently, as the exhaustion of fossil fuels and the pollution of the environment have accelerated, interest in electric vehicles(EV) and energy storage systems(ESS) has increased, so that research on the battery materials for increasing the energy density of lithium secondary batteries is actively being carried out. In particular, lithium metal (3860mAh g-1), which is one of anode materials, has a higher energy density than graphite (372mAh g-1), which is currently being commercialized, and has attracted attention as a anode material suitable for use in Li-Air and Li-Surfer cells However, lithium metal has a problem in that dendrite and dead lithium are generated in repeated charging and discharging processes, resulting in deterioration of lifetime characteristics, and explosion and ignition may occur due to an internal short circuit when exposed to a harsh environment In order to solve this problem, studies have been reported to coat the organic / inorganic composite layer on the surface of lithium metal to suppress the lithium dendrite by physical force and greatly improve the lifetime characteristics. However, there is a problem that the thick coating layer is not suitable for manufacturing a high capacity battery Therefore, in this study, we intend to improve the performance of cell by integrating separator and lithium metal by using electrochemically stable thin polymer adhesive layer. The new battery manufacturing method and electrochemical and physical properties are presented through this.