Gel electrolyte, manufacturing method of the same, and lithium-ion battery

Abstract

A gel electrolyte, its manufacturing method, and a lithium-ion battery, wherein the gel electrolyte comprises: a colloid based on a polyvinylidene fluoride-hexafluoropropylene copolymer, as well as a nitrogen-containing flame retardant and a lithium salt dispersed within the colloid. The colloid is formed by cross-linking the molecular chains of the polyvinylidene fluoride-hexafluoropropylene copolymer under the action of nitrogen atoms in the nitrogen-containing flame retardant. This invention provides a flame-retardant gel electrolyte capable of being applied to fast-charging and fast-discharging high-energy-density cathode materials. The preparation method is simple and can be adapted to existing liquid electrolyte production lines without the need for special production equipment, which is conducive to cost reduction.

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