This technology is a gel polymer electrolyte with significantly enhanced flame retardancy and thermal stability, created by impregnating a polymer porous support with a liquid electrolyte and an ionic liquid cross-linker containing two or more double-bond functional groups, followed by heat treatment to form chemical cross-links.
Conventional liquid electrolytes use flammable organic solvents, posing high risks of ignition and fire during internal short circuits or temperature increases. Simple gel electrolytes also suffer from reduced ionic conductivity due to high viscosity and issues with leakage.
This technology incorporates at least 30 wt% of an ionic liquid cross-linker with two or more double-bond functional groups to form a high-density polymer network, which suppresses electrolyte evaporation and enhances flame retardancy. It also utilizes fibrous porous supports, such as polyamide-imide (PAI), to improve both wettability and electrochemical stability. Applicable to lithium-ion batteries, sodium-ion batteries, large-scale ESS modules, and EV battery packs, it contributes to fundamentally reducing fire risks caused by thermal runaway.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of high-spec supercapacitors and high-power modules.
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