Preparation method and application of polyvinyl acetal-based gel polymer electrolyte

摘要: The invention discloses a preparation method and an application of polyvinyl acetal-based gel polymer electrolyte. According to the method, acetal polymers with structures shown as general formulae (1), (2), (3) (4) are dissolved in organic solvent system; reactive diluent photoinitiator added into liquid electrolyte certain ratio uniformly mixed obtain precursor solution; lithium ion battery diaphragm is fully swelled infiltrated by solution, then irradiated under ultraviolet rays wavelength range 200 365 nm; chemical cross linking happens obtained diaphragm-supported electrolyte, wherein R1 R2 express full compound or hemiacetal aliphatic hydrocarbons aromatic 1 13 hydrogen atoms carbon atoms. easy operate, suitable for continuous scale production in-situ film-forming batteries; moreover, prepared has high ionic conductivity wide electrochemical stability window; matching cycling performance electrode material high; leakage pollution avoided; safety high.