| abstract |
The invention provides a single-ion polymer solid electrolyte with a semi-interpenetrating network structure and a preparation method thereof. The preparation method of the single-ion polymer solid electrolyte comprises: dissolving a benzimidazole-containing monomer, a polyfunctional polyethylene glycol derivative, a double bond-containing lithium salt monomer and a thermal initiator together in a solvent, A homogeneous solution is obtained, poured into an inert gas, cast on a substrate, thermally induced radical polymerization and cross-linking reaction, and a single-ion polymer solid electrolyte containing a semi-interpenetrating network structure of benzimidazole is formed in situ. The single-ion polymer solid electrolyte prepared by the invention has high lithium ion migration number, wide electrochemical window, high ionic conductivity at room temperature, good interface compatibility and excellent mechanical properties, and can be widely used in the field of lithium batteries. |