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A kind of solid polymer electrolyte porous membrane membrane liquid and membrane-making method thereof

A solid polymer and electrolyte technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of electrolyte absorption rate and poor mechanical properties, and achieve simple operation, high feasibility, and low equipment requirements. high effect

Active Publication Date: 2016-08-24
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In view of the deficiencies in the prior art, in order to solve the problems of poor liquid absorption and mechanical properties of the current gel polymer electrolyte, the purpose of the present invention is to provide a solid polymer electrolyte porous membrane liquid with good porosity and mechanical properties and its Membrane-making method, the present invention utilizes polyol to improve the mechanical properties and internal pore structure of the polymer electrolyte membrane, by controlling the mass ratio of the polyol to the polymer matrix to improve the mechanical properties of the polymer electrolyte and to control the internal pore structure of the membrane, Make the polymer electrolyte have good liquid storage space and mechanical properties similar to elliptical three-dimensional structure pores

Method used

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  • A kind of solid polymer electrolyte porous membrane membrane liquid and membrane-making method thereof
  • A kind of solid polymer electrolyte porous membrane membrane liquid and membrane-making method thereof
  • A kind of solid polymer electrolyte porous membrane membrane liquid and membrane-making method thereof

Examples

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Effect test

Embodiment 1

[0052] 0.4g polymethyl methacrylate (M w =550,000), 0.1g polyethylene oxide (M w =300,000), 0.025 g of lithium perchlorate were stirred and dissolved in 10 ml of N-methylpyrrolidone solvent, the boiling point of the solvent was 203° C., the stirring temperature was 40° C., and the time was 12 hours. Use 1ml injection to weigh 0.150g phytic acid solution (the mass ratio of phytic acid to water in the phytic acid solution is 1:1) and inject it into the above mixed solution, continue to stir for 1 hour, then ultrasonicate at 40°C for 30 minutes, and then let stand 5 minutes to obtain a homogeneous mixed solution.

[0053] Use a 10ml syringe to take 8ml of the film-forming solution and cast it into a petri dish (75mm in diameter), and quickly place it in a 90°C, -0.08MPa vacuum oven and cover it with white paper with small holes to dry for 24 hours. Turn off the heating in the vacuum drying oven, let it cool to room temperature, open the drying oven and wipe off the liquid in th...

Embodiment 2

[0057] 0.4g polymethyl methacrylate (M w =550,000), 0.1g polyethylene oxide (M w =300,000), 0.025 g of lithium perchlorate were stirred and dissolved in 10 ml of N-methylpyrrolidone solvent, the boiling point of the solvent was 203° C., the stirring temperature was 40° C., and the time was 12 hours. Use 1ml injection to inject 0.25g phytic acid solution (the mass ratio of phytic acid to water in the phytic acid solution is 1:1) into the above mixed solution, continue to stir for 1 hour, then ultrasonicate at 40°C for 30 minutes, and then let it stand for 5 minutes. Minutes to obtain a homogeneous mixed solution.

[0058] Use a 10ml syringe to take 8ml of the film-forming solution and cast it into a petri dish (75mm in diameter), and quickly place it in a 90°C, -0.08MPa vacuum oven and cover it with white paper with small holes to dry for 24 hours. Turn off the heating in the vacuum drying oven, let it cool to room temperature, open the drying oven, wipe off the liquid in the...

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Abstract

The invention discloses solid polymer electrolyte porous membrane liquid and a membrane producing method thereof. The membrane liquid contains polymer, lithium salt, solvent and polyol. The membrane producing method comprises the steps of using a membrane producing liquid to form a membrane by means of a casting method, performing vacuum drying to remove moisture in a drying device, then performing repeated vacuum drying and finally stripping the membrane. The solid polymer electrolyte porous membrane liquid utilizes the polyol to improve the mechanical performance and an internal pore structure of the polymer electrolyte membrane, controls the mass ratio of the polyol to a polymer base body to improve the mechanical performance and the internal pore structure of the polymer electrolyte membrane, enables polymer electrolyte to have good liquid storage space similar to elliptic three-dimensional structure pores and mechanical performance, and a new way is provided for solving the problems of electrical conductivity and mechanical performance compatibility of the polymer electrolyte in a polymer li-ion battery.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and in particular relates to a solid polymer electrolyte porous membrane liquid and a membrane-making method thereof. Background technique [0002] Polymer lithium-ion batteries have excellent properties such as high specific energy, high working voltage, good cycle performance, no memory, and no pollution. They have broad application prospects in electric vehicles, mobile phones and other electronic devices. With the thinner and lighter electronic products and the demand for portable development, it has become a trend for lithium-ion batteries as energy storage devices to develop towards flexible batteries. As a solid polymer electrolyte, polymers face great challenges, including high-temperature performance, mechanical properties, and electrical conductivity of polymer electrolytes. [0003] Polymer electrolytes are mainly composed of polymer matrix and lithium salt. There are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M10/058Y02E60/10
Inventor 梁波江清柏李胜良唐思绮陈栩
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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