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Preparation method of all-solid-state polymer electrolyte

An all-solid polymer and electrolyte technology, used in circuits, electrical components, secondary batteries, etc., can solve problems such as explosions, potential safety hazards, and easily induced combustion.

Active Publication Date: 2017-05-31
SHENZHEN SENIOR TECH MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The liquid electrolyte of lithium-ion batteries contains organic solvents with low boiling points. It is easy to induce combustion or explosion when there is a collision during transportation or when the battery is heated or overcharged. The development of energy electric vehicles

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  • Preparation method of all-solid-state polymer electrolyte
  • Preparation method of all-solid-state polymer electrolyte

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[0022] The invention provides a method for preparing an all-solid polymer electrolyte, comprising the following steps: 2 In the atmosphere, mix the ammonia-free modifier and methylimidazole, heat in an oil bath, and obtain a quaternary ammonium salt after reaction; graft PEG sulfonic acid groups on the quaternary ammonium salt to obtain PEG sulfonate, and imidazolium salt Dissolve in THF, then add described PEG sulfonate, obtain reaction product A after the reaction; Described reaction product A and SiO 2 The aqueous solution is mixed, and after the reaction, a methylimidazole-containing fluid is obtained; Methyl methacrylate (MMA), LiClO 4 -PC solution, azobisisobutyronitrile (AIBN) and the fluid containing methylimidazole are mixed, stirred, and reacted to obtain a prepolymer; the prepolymer is coated on the surface of aluminum foil and heated to obtain an all-solid state polymer electrolyte.

[0023] As a preferred solution, the present invention has no special restrictio...

Embodiment 1

[0035] Accurately weigh 3.0000g of ammonia-free modifier and 3.7500g of methylimidazole, and pour them into a three-necked flask. The whole process is carried out under N 2 Carried out in the atmosphere, the viscous quaternary ammonium salt is obtained after the reaction, and the reaction conditions are 80°C, 72h;

[0036] Graft the PEG sulfonic acid group to the quaternary ammonium salt, accurately weigh 3.6553g of imidazolium salt and dissolve it in THF, then weigh 15.25g of PEG sulfonate and add it, and the reaction lasts at room temperature for 1h. After the reaction is completed, filter the product , wash with THF, obtain reaction product A;

[0037] First weigh 3.15g of reaction product A and dissolve it in 15ml of absolute ethanol, then weigh 1.17g of nano-SiO 2 Dissolve in about 28ml distilled water; SiO 2 The aqueous solution was added to the ethanol solution of the reaction product A, and the reaction was carried out in the flask, and stirred magnetically for 24 ho...

Embodiment 2

[0041] Accurately weigh 3.0000g of ammonia-free modifier and 3.7500g of methylimidazole into a three-necked flask, and the whole process is carried out under N 2 Carried out in the atmosphere, the viscous quaternary ammonium salt is obtained after the reaction, and the reaction conditions are 80°C, 72h;

[0042] Graft the PEG sulfonic acid group to the quaternary ammonium salt, accurately weigh 3.6553g of imidazolium salt and dissolve it in THF, then weigh 15.25g of PEG sulfonate and add it, and the reaction lasts at room temperature for 1h. After the reaction is completed, filter the product , wash with THF, obtain reaction product A;

[0043] First weigh 3.15g of reaction product A and dissolve it in 15ml of absolute ethanol, then weigh 1.17g of nano-SiO 2 Dissolve in about 28ml distilled water; SiO 2 The aqueous solution was added to the ethanol solution of the reaction product A, and the reaction was carried out in the flask, and stirred magnetically for 24 hours at room...

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Abstract

The invention provides a preparation method of all-solid-state polymer electrolyte. The preparation method comprises the following steps: mixing an ammonia-free modifying agent and methylimidazole in an N2 atmosphere; heating in an oil bath and reacting to obtain quaternary ammonium salt; grafting a PEG (Polyethylene Glycol) sulfonic acid group on the quaternary ammonium salt to obtain PEG sulfosalt; dissolving imidazolium into THF (Tetrahydrofuran) and adding the PEG sulfosalt; reacting to obtain a reaction product A; mixing the reaction product A with a SiO2 water solution; reacting to obtain a fluid containing the methylimidazole; mixing methyl methacrylate, a LiClO4-PC solution, 2,2'-azobis(2-methylpropionitrile) and the fluid containing the methylimidazole; stirring and reacting to obtain a pre-polymer; and coating a film on the surface of an aluminum foil and heating to obtain the all-solid-state polymer electrolyte. The PMMA (Polymethyl Methacrylate)-based all-solid-state electrolyte prepared by the invention has the characteristics of high electrical conductivity, large lithium-ion transference number and wide electrochemical window. The preparation process is simple and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of an all-solid polymer electrolyte. Background technique [0002] Since the commercial production of lithium-ion batteries by Sony Corporation in 1990, lithium batteries have been widely used around the world. With the rapid development of the communication industry, the application of smart phones, notebook computers and digital cameras has greatly promoted the development of lithium-ion batteries. Compared with traditional lead-acid, nickel-cadmium and other batteries, lithium-ion batteries have low redox potential (-3.05V under standard conditions), low density (only 0.534g / cm 3 ), high mass specific energy density (up to 200W.h / kg) and other advantages. Especially in recent years, 3C products tend to minimize the direction of devices, and the matching batteries are also developing in the direction of minimization. Lithium-ion batteries ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565
CPCH01M10/0565Y02E60/10
Inventor 张德林陈勇陈秀峰
Owner SHENZHEN SENIOR TECH MATERIAL
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