Importance

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Abstract

The invention relates to a composition for preparing a gel electrolyte characterized in that the composition comprises: (1) at least one compound of formula (1), wherein each R₁, R₂ and R₃ independently is a linear or branched alkenyl or alkynyl having 2 to 7 carbon atoms, R₄ is a alkyl having 1 to 5 carbon atoms, hydroxyl, or R₅COO—, wherein R₅ is a linear or branched alkenyl or alkynyl having 2 to 7 carbon atoms, and n is an integer of 0, 1 or 2, and the content of compound of formula (1) is 0.01-10 wt %, preferably 0.1-8 wt % based on the total weight of the composition; (2) a non-aqueous solvent, wherein the content of the nonaqueous solvent is 60-99 wt %, preferably 80-98 wt % based on the total weight of the composition; (3) a lithium salt, wherein the concentration of the lithium salt in the non-aqueous solvent is 0.2-2.0 mol/L, preferably 0.8-1.5 mol/L. The invention also relates to a gel electrolyte obtained by polymerization, especially in-situ thermal polymerization of the composition and lithium-ion battery employing the gel electrolyte.

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First Claim