Abstract: Disclosed is a method for preparing fast ionic conductors based on in-situ polymerization, which uses the spatial resistance volume effect to widen ion migration channels by copolymerizing high spatial resistance monomers with highly reactive crosslinkers, resulting in shorter ion transport paths and substantially higher ionic conductivity of in-situ solid-state polymer electrolytes; also, the high spatial resistance monomers and highly reactive crosslinkers synergistically construct a three-dimensional network structure with both high mechanical strength and stable electrode electrolyte interface properties.

Abstract: Disclosed is a method for improving an interface of composite solid electrolyte in situ relates to the field of composite solid electrolyte. By cooling and solidifying the first trans-crystalline solidified liquid, a first trans-gauche isomeric plastic crystal layer is constructed between the positive electrode and the composite solid electrolyte; by cooling and solidifying the second trans-crystalline solidified liquid, a second trans-gauche isomeric plastic crystal layer is constructed between the composite solid electrolyte and the negative electrode; the first trans-crystalline solidified liquid includes trans-gauche isomeric plastic crystals and lithium salt, and the second trans-crystalline solidified liquid includes trans-gauche isomeric plastic crystals, lithium salt and additives.

Abstract: According to the application, a double interphase layer strategy with self-healing function is constructed at an interphase between an in-situ solid-state electrolyte and a lithium metal by the synergistic effect of double Lewis acids, a first protective layer inhibits a side reaction of the lithium metal and the in-situ solid-state electrolyte, and a second protective layer self-heals defects of the double interphase layer. The application solves the problem of unstable interface between electrode and electrolyte of in-situ solid-state lithium metal battery, and obtains lithium metal battery with high energy density, high coulombic efficiency and ultra-long cycling life.

Abstract: Disclosed are an interface layer of metallic lithium and solid electrolyte and preparation method thereof, including dissolving polymer matrix and lithium salt in an organic solvent, then adding a mixed powder of boron nitride nanoparticles and solid electrolyte, dispersing evenly, coating onto a solid electrolyte, and drying to obtain an interface layer.