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Anti-overcharge electrolyte and lithium-ion battery

An overcharge and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as poor compatibility and affect the cycle performance of lithium-ion batteries, and achieve the effect of preventing overcharging and achieving good synergy.

Active Publication Date: 2019-07-30
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nitrile compounds have poor compatibility with low-potential negative electrode active materials such as graphite or metallic lithium in lithium-ion batteries, and are prone to polymerization reactions on the surface of the negative electrode, and the polymerization products will prevent Li + Deintercalation, affecting the cycle performance of lithium-ion batteries

Method used

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  • Anti-overcharge electrolyte and lithium-ion battery
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  • Anti-overcharge electrolyte and lithium-ion battery

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Embodiment Construction

[0013] Describe below according to anti-overcharging electrolyte solution of the present invention and lithium ion battery and embodiment, comparative example and test process and test result.

[0014] First, the overcharge preventing electrolyte solution according to the first aspect of the present invention will be described.

[0015] The anti-overcharge electrolyte solution according to the first aspect of the present invention includes a lithium salt, a non-aqueous organic solvent and a combination of additives. The combination of additives includes Additive A and Additive B. Additive A is selected from at least one of formula 1, formula 2 and formula 3; wherein, R 1 ~R 6 Each independently selected from fluorine, chlorine, bromine, nitro, cyano, alkyl, alkoxy, haloalkyl, isocyanate, trifluoromethanesulfonyl, trifluoroacetyl, carboxyl, lithium carboxylate, carboxylic acid One of sodium salt, phosphoric acid group, lithium phosphate salt, sodium phosphate salt, sulfonic ...

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Abstract

The invention provides an overcharge prevention electrolyte and a lithium ion battery. On the premise of not affecting the circulating performance, the overcharge prevention electrolyte can improve the safety of the lithium ion battery. The overcharge prevention electrolyte is prepared from lithium salt, a non-aqueous organic solvent and combined additives. The additive A is selected from at least one of formulas 1, 2 and 3; the additive B is selected from at least one of formulas 4, 5 and 6.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, and more specifically, the invention relates to an anti-overcharge electrolyte and a lithium-ion battery. Background technique [0002] Since the current lithium-ion batteries mostly use extremely flammable carbonate-based organic electrolytes, overcharging, overdischarging and overheating of the battery may cause the battery to burn or even explode. Therefore, improving the stability of the electrolyte is an important way to improve the safety of lithium-ion batteries when electrode materials, electrolyte materials, and separator materials are unlikely to change fundamentally in a short period of time. [0003] Lithium-ion battery anti-overcharge electrolytes are mainly divided into two types: electropolymerization type and redox type. Electropolymerization additives such as biphenyl and cyclohexylbenzene can effectively inhibit battery overcharge, but their addition will damage the cycle p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0569H01M10/0525
CPCH01M10/0525H01M10/0569H01M10/0567H01M10/0568Y02E60/10
Inventor 王可飞林永寿陈杰
Owner CONTEMPORARY AMPEREX TECH CO