Method for preparing all-solid-state polymer electrolyte membrane and prepared electrolyte membrane

A technology of all-solid polymer and electrolyte membrane, which is applied in fuel cell components, circuits, fuel cells, etc., can solve problems such as electrolyte leakage and safety, and achieve increased compatibility, improved mechanical properties, and good ion conductivity rate effect

Active Publication Date: 2011-04-20
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The preparation method of the all-solid polymer electrolyte membrane of the present invention replaces the liquid electrolyte with a solid polymer electrolyte, which can solve the safety problem caused by the leakage of the electrolyte, and the shape of the lithium-ion battery can be changed as required

Method used

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  • Method for preparing all-solid-state polymer electrolyte membrane and prepared electrolyte membrane
  • Method for preparing all-solid-state polymer electrolyte membrane and prepared electrolyte membrane
  • Method for preparing all-solid-state polymer electrolyte membrane and prepared electrolyte membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Dissolve liquid crystal polymer E containing sulfonate ions at a concentration of 3 g / L in N-methylpyrrolidone and acetonitrile, and stir at a constant temperature of 75°C until completely dissolved to obtain solution G;

[0035] (2) Dissolve PEO with a concentration of 10 g / L (molecular weight of 500,000-600,000) in water and acetonitrile and stir until completely dissolved to obtain solution H;

[0036] (3) PMMA with a concentration of 10g / L (viscosity average molecular weight of 100,000-500,000) and LiClO with a concentration of 9g / L 4 Dissolve in acetone solution and stir until completely dissolved to obtain solution I;

[0037] (4) Mix the three solutions of G, H, and I at a volume ratio of 5:1:6. The viscosity after mixing is 10-300dl / g. Stir the mixture evenly, cast it in a polytetrafluoroethylene mold, and dry it in dry air. Volatile for 12 hours under the same conditions to form a film or use a spin coating mechanism to form a film, and then vacuum dry at ...

Embodiment 2

[0039] (1) Dissolve liquid crystal polymer F containing sulfonate ions at a concentration of 50 g / L in N-methylpyrrolidone and acetonitrile, stir at 80°C until completely dissolved, and obtain solution G;

[0040] (2) Dissolve PEO (with a molecular weight of 500,000-600,000) with a concentration of 20 g / L in water and acetonitrile and stir until completely dissolved to obtain solution H;

[0041] (3) PMMA with a concentration of 13g / L (viscosity average molecular weight of 100,000-500,000) and LiClO with a concentration of 10g / L 4 Dissolve in acetone solution and stir until completely dissolved to obtain solution I;

[0042] (4) Mix the three solutions of G, H, and I at a volume ratio of 5:1:6. The viscosity after mixing is 10-300dl / g. Stir the mixture evenly, cast it in a polytetrafluoroethylene mold, and dry it in dry air. Volatile under the conditions for 12h to form a film or use a spin coating mechanism to form a film, and then vacuum dry at 80°C for 72h to obtain a liqu...

Embodiment 3

[0044] (1) Dissolve liquid crystal polymer E containing sulfonate ions at a concentration of 25 g / L in N-methylpyrrolidone and acetonitrile, and stir at a constant temperature of 75°C until completely dissolved to obtain solution G;

[0045] (2) Dissolve PEO (molecular weight: 500,000-600,000) with a concentration of 15 g / L in water and acetonitrile and stir until completely dissolved to obtain solution H;

[0046] (3) PMMA with a concentration of 10g / L (viscosity average molecular weight of 100,000-500,000) and LiClO with a concentration of 10g / L 4 Dissolve in acetone solution and stir until completely dissolved to obtain solution I;

[0047] (4) Mix the three solutions of G, H, and I at a volume ratio of 5:1:6. The viscosity after mixing is 10-300dl / g. Stir the mixture evenly, cast it in a polytetrafluoroethylene mold, and dry it in dry air. Volatile under the conditions for 12h to form a film or use a spin coating mechanism to form a film, and then vacuum dry at 80°C for 7...

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Abstract

The invention discloses a method for preparing an all-solid-state polymer electrolyte membrane and a prepared electrolyte membrane. The method comprises the following steps of: dissolving liquid crystal polymer E or F containing sulfoacid ions into N-methylpyrrolidone and acetonitrile to obtain a solution G; dissolving PEO (Poly Ethylene Oxide) into water and acetonitrile to obtain a solution H; dissolving PMMA (Polymethyl Methacrylate) and LiClO4 into an acetone solution to obtain a solution I; mixing G, H and I, evenly mixing, and pouring in a die; drying after volatilizing to form the membrane or manufacturing the membrane by a whirler; and obtaining a PEO / PMMA composite solid-state polymer electrolyte membrane containing the liquid crystal polymer and LiClO4, wherein the thickness range of the membrane is 0.2-0.5mm, and the room-temperature ion electrical conductivity of the membrane is above 10-3S / cm. The electrolyte membrane obtained through the technical scheme of the invention is the polymer solid electrolyte membrane product with favorable ion electrical conductivity and high mechanical strength.

Description

technical field [0001] The invention relates to a polymer electrolyte membrane and a preparation method thereof. Background technique [0002] Lithium-ion battery refers to lithium-ion secondary battery. It is an interdisciplinary field involving chemistry, physics, materials, energy and many other disciplines, and its application range is very wide. Currently used lithium-ion batteries have the advantages of light weight, high energy, long service life, high working voltage, and stable discharge. However, the main problem restricting its development is the application of liquid electrolyte system. Although it has high ion conductivity, it has relatively large defects. Compared with the instability of metal lithium electrodes and other low-potential electrodes, mechanical isolation and comparative Large battery size, long charging time, large internal resistance and difficult to discharge with high current, difficult to use with other batteries, potential safety hazards, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L67/02C08L71/02C08L33/12C08K3/24H01M8/02H01M8/1027H01M8/103H01M8/1069H01M10/0565
CPCY02E60/50Y02P70/50
Inventor 张爱玲王松李三喜梁吉艳
Owner SHENYANG POLYTECHNIC UNIV
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