Halide solid-state electrolytes for all-solid-state batteries: structural design, synthesis, environmental stability, interface optimization and challenges

Abstract

The design principle and synthesis method of halide solid-state electrolytes are discussed in detail. Interface optimization of halide solid-state electrolytes and their applications in all-solid-state batteries are described.

Technological Advances and Market Developments of Solid-State Batteries: A Review

“…Unlike traditional LIBs, which use a liquid electrolyte to transport ions between the cathode and anode, SSBs use a solid-state electrolyte (SSE) to perform the same transport function. As shown in Figure 1 , SSEs used in rechargeable batteries can be divided into three categories based on chemical composition: inorganic solid ceramic electrolytes, organic solid polymer electrolytes, and solid composite electrolytes, a combination of the first two material classes [ 7 , 13 , 14 ].…”

“…Compared to oxide and sulfide-based ISEs, halide ISEs exhibit a more well-rounded set of properties across different factors, encompassing ionic conductivity, electrochemical stability window, and moisture resistance. These materials have gained attention for their potential use in SSBs due to their high ionic conductivity and compatibility with various battery chemistries [ 13 ]. However, halide-based solid electrolytes can also present challenges related to stability and materials processing, specifically due to their sensitivity to moisture [ 66 ].…”

Co-doping strategies for advanced solid state electrolytes with lithium salt: a study on the structural and electrochemical properties of LATP

“…Halide solid-state electrolytes are intensively studied for application in ASSB due to their favorable combination of high ionic conductivity and chemical and electrochemical stability. Still, they are hygroscopic in nature, like sulfides, have interface issues, and have lower mechanical strength [9]. Long-term research on polymer electrolytes has shown several issues, including flammability and poor ion transport, which are crucial to developing highenergy density and secure batteries [10].…”

Aliovalent Substitution in Li3InCl6: A Combined Experimental and Computational Investigation of Structure and Ion Diffusion in Lithium-Halide Solid State Electrolytes

“…Metal-halide solid state electrolytes (SSEs) are emerging as promising candidates for application in solid state rechargeable batteries. , Among their main advantages are a potential wide electrochemical stability window, a better chemical stability as compared to that of the traditional mixed oxide cathodes, and the possibility to compact them through cold-pressing due to higher malleability compared to oxide-based SSEs. In addition, certain compositions such as Li 3 InCl 6 can be directly synthesized at large scales through wet-chemistry techniques, including water as the solvent; the relatively easy synthetic procedure makes this family of SSEs stand out compared to other recently introduced systems …”

“…In addition, certain compositions such as Li 3 InCl 6 can be directly synthesized at large scales through wet-chemistry techniques, including water as the solvent; the relatively easy synthetic procedure makes this family of SSEs stand out compared to other recently introduced systems. 3 Li 3 InCl 6 crystallizes in a monoclinic layered structure (space group C2/m). At least three structural models have been proposed in the literature for this composition, and these are compared in Figure 1.…”