A kind of cross-linked polymer electrolyte suitable for lithium secondary battery and preparation method thereof

Abstract

The invention discloses a crosslinked polymer electrolyte suitable for a lithium secondary battery and a preparation method thereof. The electrolyte is crosslinked by a low molecular weight polyetherderivative under the action of a crosslinking agent. The electrolyte has the advantages of simple preparation, high room temperature conductivity, good flexibility and oxidation decomposition potential of higher than 4.5 V.

Description

technical field

[0001] The invention relates to the field of electrolytes, in particular to a cross-linked polymer electrolyte suitable for lithium secondary batteries and a preparation method thereof. Background technique

[0002] Lithium-ion batteries have the advantages of high energy density, large output power, high voltage, small self-discharge, wide operating temperature range, no memory effect, and environmental friendliness. They have been used in electric vehicles, rail transit, large-scale energy storage, and aerospace. field. At present, commercial lithium-ion batteries use organic liquid electrolytes. The electrolyte and electrode materials are prone to side reactions during charge and discharge, resulting in irreversible decline in battery capacity. Drying, leakage and other phenomena will affect the battery life. Solid electrolytes have higher safety and ease of operation due to non-leakage, easy packaging and wide operating temperature range, and solid elec...

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