Metal–organic frameworks for solid-state electrolytes: A mini review

Solid-state lithium-metal batteries with lithium-metallic as anodes have attracted countless attention by virtue of their high energy density and safety, in which solid electrolytes with the high mechanical strength, ionic conductivity, and compatible interface are the significant key in suppressing the growth of dendrites and eliminating the risk of inner short circuits. The introduction of fillers into poly(ethyleneoxide)(PEO)-based solid polymer electrolytes is well regarded as an effective routine to modify their mechanical and electrochemical properties. Metal–organic frameworks (MOFs), a type of porous crystalline materials composed of inorganic metal ions and organic ligands, have drawn broad research interest, presenting giant potential in the fabrication of high-performance SSEs due to their abundant porosity and controllable functionality. In this review, the applications of metal–organic frameworks in PEO along with their electrochemical performance in solid-state lithium-metal batteries are outlined.