Versatile polymer-supported argyrodite-type sulfide solid electrolyte membranes for energy-dense lithium batteries

Abstract

All-solid-state lithium batteries (ASSLBs) have attracted wide attention due to their high energy density and inherent safety. They have been touted as a solution to satisfy the surging demands in energy and safety from electric vehicles, unmanned aerial vehicles and portable electronics. Despite the successful exploration of various advanced electrode materials for fabricating high-performance ASSLBs, solid electrolyte (SE) layer is one of the most important and easily overlooked factors in determining the energy density of ASSLBs. Recently, the construction of versatile polymer-supported SE membranes has emerged as a key path towards practical energy-dense all-solid-state pouch batteries, facilitating large-scale high-efficiency production and commercial application of ASSLBs. However, substantial uncertainties persist in the multidimensional polymer construction strategies and high-throughput controllable manufacturing processes. In this review, on the basis of commercially viable argyrodite-type sulfide solid electrolytes (ASSEs), we provide a comprehensive overview of the construction and fabrication strategies of ASSE membranes, and analyses the changes of the physicochemical properties of ASSE membranes by polymers. We assess possible application scenarios including all-solid-state pouch batteries and bipolar-type batteries as well as emphasize the importance of operating under low-pressure conditions. Finally, we present a future vision of energy-dense ASSLBs and high-performance functionalized ASSE membranes beyond tradition.