Additive of electrolytic solution of lithium ion battery

A technology of lithium-ion batteries and additives, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of battery structure and chemical system damage, battery gas swelling, etc., to improve stability and safety performance, reduce gas , the effect of reducing the risk of flatulence

Inactive Publication Date: 2010-09-29
惠州市德赛聚能电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The gas produced is easy to cause the battery to swell. In addition, the battery will also generate gas during charging and discharging, which will cause the battery to swell and cause great damage to the structure and chemical system of the battery.

Method used

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  • Additive of electrolytic solution of lithium ion battery

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Experimental program
Comparison scheme
Effect test

Embodiment

[0015] An additive for the electrolyte solution of a lithium ion battery, wherein the additive is one or more of dianhydride, phthalic anhydride, and propionic anhydride.

[0016] The structural formula of the dianhydride is:

[0017] The structural formula of phthalic anhydride is:

[0018] The structural formula of propionic anhydride is:

[0019] The additive is added in the same type of lithium-ion battery electrolyte, and its selection type and addition amount are shown in No. 1-12 formulas of Table 1. The obtained electrolyte was poured into the same type of batteries to make 12 groups of experimental batteries, 20 batteries in each group, and a group of comparative experimental products without additive electrolyte, also 20 batteries. . After making these test products into components at the same time, put them in an oven at 85°C and bake them for 4 hours. The test results of the comparative experimental product obtained from the electrolyte without additives ...

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PUM

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Abstract

The invention discloses an additive of electrolytic solution of a lithium ion battery. The additive is an estolide type organic substance. The estolide type organic substance is one kind or several kinds of materials in dicarboxylic anhydride, phthalic anhydride and propionic andydride. Because the additive is the estolide type organic substance, the compound gas can be converted into liquid or solid substances through chemical reactions. Thereby, the problems of gas bubbling and gas expansion of the battery can be solved, and the stable performance and the safety performance of the battery can be improved.

Description

technical field [0001] The invention relates to an additive for a liquid electrolyte of a lithium ion battery. Background technique [0002] During the formation of lithium-ion batteries, due to the reaction between the electrolyte and the carbon negative electrode, alcohols and olefins can be produced accordingly. The electrolyte of carbonate is often accompanied by the reduction products of various gases during the first charging process of the electrode, such as CO2, CO, H2, CH2CH2 and CH3CH2CH2. The gas produced is easy to cause the battery to swell. In addition, the battery will also generate gas during charging and discharging, which will cause the battery to swell and cause great damage to the structure and chemical system of the battery. Contents of the invention [0003] The technical problem to be solved by the invention is to reduce the gas generated during the formation of the lithium-ion battery and further improve the safety performance of the lithium-ion ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056
CPCY02E60/10
Inventor 吴会群孙迎新刘志伟
Owner 惠州市德赛聚能电池有限公司
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