Adhesive Sulfide Solid Electrolyte Interface for Lithium Metal Batteries

Abstract

All solid-state Li metal batteries have drawn extensive attention because of the limited side reaction and consequent safety character. The applications of Li metal anodes are indispensable for realizing high energy density but still face many obstacles. One of the critical issues is the contact failure of the solid/solid interface. The rigid interface between a sulfide electrolyte and Li anode cannot afford the volume variation during cycling. Herein, we design an adhesive solid-state electrolyte film, which is supported by hot melt adhesive porous membranes for anode protection. The Li symmetric cells and all solid-state batteries based on adhesive electrolyte layers all exhibit enhanced long cyclic stability and suppressed voltage polarization. The peel strength tests confirm that the electrolyte layers decorated with adhesive components can offer intimate Li metal/electrolyte physical contact and withstand the volume variation of the Li anode. The adhesion force from porous membranes is believed to play a vital role in maintaining solid−solid interfacial contact stability. This work gives a new insight for interface engineering in all solid-state Li metal batteries.

Uniform Deposition of Li-Metal Anodes Guided by 3D Current Collectors with In Situ Modification of the Lithiophilic Matrix

“…Also, the current mainstream solutions fall into two categories. On one hand, artificial SEI can be prepared by surface modification of Li − or electrolyte modification − to construct more uniform, higher-strength and higher-elasticity SEI so as to improve the chemical and mechanical stability of the Li-metal anode interface. On the other hand, a 3D host can be designed as the skeleton of the Li plating/stripping process.…”

Progress study on the development of lithium-sulfur batteries

“…Secondly, there are serious side reactions and insufficient stability at the interface between electrode and electrolyte. Therefore, constructing an effective and stable interface (interface modification) is very important to improve the electrochemical performance of solid-state Li-S batteries [17].…”

Air Stability and Interfacial Compatibility of Sulfide Solid Electrolytes for Solid‐State Lithium Batteries: Advances and Perspectives

“…An effective strategy to improve the interface contact is to modify the solid electrolytes and design a flexible electrolyte to promote the conformal contact between electrolytes and lithium anodes. Jiang et al [67] prepared a viscous solid electrolyte membrane by placing LGPS powder in vinyl acetate porous membrane (EVAP). The EVAP membrane had excellent thermal stability, low flammability and strong adhesion.…”

“…[66] Copyright 2021, American Chemical Society. [67] Copyright 2020, American Chemical Society. b) Schematic diagrams of the dynamic evolution and interfacial mechanism of Li and Li x In.…”

“…Figure 10. a) Schematic Diagram of the Adhesive SE Design for ASSLBs to Stabilize the Li Anode/Electrolyte Interface [67]. Copyright 2020, American Chemical Society.…”