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Lithium ion battery electrolyte and lithium ion battery

A lithium-ion battery and electrolyte technology, applied in the field of electrochemistry, can solve problems such as hindering the application of flame retardant additives, increasing the viscosity of the electrolyte, reducing the conductivity of the electrolyte, etc., and achieves the effect of small negative impact

Inactive Publication Date: 2017-03-22
ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to achieve the effect of flame retardant, the addition of flame retardant additives must reach a certain amount. When the amount of flame retardant additives is too large, the viscosity of the electrolyte will be increased, the conductivity of the electrolyte will be reduced, and the electrical properties of the battery will be affected. Application of Combustion Additives in Electrolyte

Method used

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  • Lithium ion battery electrolyte and lithium ion battery
  • Lithium ion battery electrolyte and lithium ion battery
  • Lithium ion battery electrolyte and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0034] Preparation Example 1: Preparation of Cyclohexylphenoxypentafluorotripolyphosphazene

[0035] Using cyclohexylphenol and hexafluorocyclotriphosphazene as raw materials, triethylamine is selected as the acid-binding agent, fed into the organic solvent (acetonitrile) in the autoclave at one time, stirred rapidly, heated to 90°C, and the reaction was completed in 4 hours. After cooling to room temperature, it was filtered to obtain cyclohexylphenoxypentafluorotrimeric phosphazene.

[0036] The reaction equation is:

[0037]

[0038] For the MS chart of cyclohexylbenzenepentafluorotripolyphosphazene, see figure 1 , GC diagram see figure 2 , TCD diagram see image 3 .

preparation example 2

[0039] Preparation 2: tert-butylphenoxypentafluorotripolyphosphazene

[0040]Use p-tert-butylphenol and hexafluorocyclotriphosphazene as raw materials, select triethylamine as the acid-binding agent, feed in the organic solvent (acetonitrile) in the autoclave at one time, stir rapidly, heat up to 90°C, and react for 4 hours Finish. After cooling to room temperature, tert-butylphenoxypentafluorotripolyphosphazene was obtained by filtration.

preparation example 3

[0041] Preparation 3: 3,4-Difluorobiphenoxypentafluorotripolyphosphazene

[0042] Use 3,4-difluorobiphenol and hexafluorocyclotriphosphazene as raw materials, select triethylamine as the acid-binding agent, feed in the organic solvent (acetonitrile) in the autoclave at one time, stir rapidly, and heat up to 90°C. The reaction was completed in 4 hours. After cooling to room temperature, 3,4-difluorobiphenoxypentafluorotripolyphosphazene was obtained by filtration.

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Abstract

The invention relates to a lithium ion battery electrolyte. The lithium ion battery electrolyte comprises a lithium salt, a solvent and additives, wherein the additives are selected from one or combination of the structures: FORMULA which is as shown in the specification, wherein R1, R2, R3, R4 and R5 are independently selected from any one kind of hydrogen group, alkyl group, alkoxy, alkylene, alkyl halide group, alkyl halide oxygen group, alkenyl halide group, hydroxyl, carboxyl, ether oxygen group or halogen, wherein the halogen is F, Cl or Br; A is group constituted by O, S, N or P; and R6, R7, R8, R9 and R10 are independently selected from any one kind of hydrogen group, alkyl group, naphthenic group, alkoxy, phenyl group, fluoroalkane group, fluoro-naphthene group, fluoroalkoxy group, fluorophenyl, fluoro-phenoxyl and a fluoro group which is constituted by O, S, N and P, wherein the halogenating or fluorination is wholly substituted or partially substituted. The lithium ion battery electrolyte provided by the invention has anti-overcharge and flame-retardant functions, and has relatively low adverse influence on the performance of the battery.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a lithium-ion battery electrolyte and a lithium-ion battery. Background technique [0002] Lithium-ion batteries are more and more widely used in people's production and life, which makes its safety issues become the focus of attention. Safety issues are a major challenge to lithium-ion batteries. During high-current charging and discharging and battery overcharging, the heat accumulation inside the battery can easily lead to thermal runaway, and even cause the battery to burn and explode. [0003] There are two main ways to solve the electrolyte. On the one hand, when the battery is overcharged by adding overcharge additives, the overcharge additives are preferentially oxidized and polymerized, and an insulating polymer film is formed on the interface of the positive electrode, thereby blocking the battery. Cut off the flow of current inside the battery to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0568H01M10/0525
CPCH01M10/0525H01M10/0567H01M10/0568C07F9/65815H01M2300/0025Y02E60/10
Inventor 陈晓琴甘朝伦戴建才陈俊彩张力王峰
Owner ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD
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