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Matrix gel polymer electrolyte adopting plant cellulose membrane and preparation method thereof

A plant cellulose membrane and gel polymer technology, which is applied in the manufacture of electrolyte batteries, organic electrolytes, non-aqueous electrolytes, etc., can solve the problems that gel polymer electrolyte membranes cannot be produced in large-scale factories, and solve the impact Factory production, reduction of air pollution, and the effect of feasible methods

Inactive Publication Date: 2015-03-04
SOUTHWEST PETROLEUM UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to completely solve the fundamental problem that the gel polymer electrolyte membrane cannot be industrialized into a large-scale film, it provides feasibility for the development of the gel polymer electrolyte lithium-ion battery product; The introduction of paper and wood waste into the battery field provides a broader space for the development of straw, waste paper and wood waste

Method used

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  • Matrix gel polymer electrolyte adopting plant cellulose membrane and preparation method thereof
  • Matrix gel polymer electrolyte adopting plant cellulose membrane and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] (1) Put the bagasse cellulose pulp into demineralized hot water, beat in a high-speed mixer until a uniform slurry suspension is obtained, and at the same time control the final concentration of the suspension to 2.0g L -1 ;

[0023] (2) Under vacuum conditions, filter the suspended slurry on the filter cloth within 30s, remove the wet cellulose membrane from the filter cloth and put it in a vacuum oven at 70°C for 48 hours to obtain a dried porous cellulose membrane;

[0024] (3) Polymethyl methacrylate is dissolved in acetone at room temperature, and stirred to obtain a uniform solution;

[0025] (4) Soak the dried cellulose film in the obtained solution. After the cellulose film absorbs the solution to the maximum, it is taken out with tweezers, and the solvent is volatilized from the cellulose film to obtain a polymeric film based on the cellulose film. Compound complex, and then placed in a vacuum oven at 40 ° C to remove trace solvents;

[0026] (5) Immerse the ...

Embodiment 2

[0028] (1) Put the waste paper cellulose pulp in the packing box into demineralized hot water, beat in a high-speed mixer until a uniform slurry suspension is obtained, and at the same time control the final concentration of the suspension to 2.5g L -1 ;

[0029] (2) Under vacuum conditions, filter the suspended slurry on the filter cloth within 30s, remove the wet cellulose membrane from the filter cloth and put it in a vacuum oven at 60°C for 48 hours to obtain a dried porous cellulose membrane;

[0030] (3) Polyacrylonitrile is dissolved in acetone at room temperature, and stirred to obtain a uniform solution;

[0031] (4) Soak the dried cellulose film in the obtained solution. After the cellulose film absorbs the solution to the maximum, it is taken out with tweezers, and the solvent is volatilized from the cellulose film to obtain a polymeric film based on the cellulose film. Compound complex, and then placed in a vacuum oven at 50 ° C to remove trace solvents;

[0032]...

Embodiment 3

[0034] (1) Put straw and hardwood waste cellulose mixed pulp into demineralized hot water, beat in a high-speed mixer until a uniform slurry suspension is obtained, and at the same time control the final concentration of the suspension to 1.5g L -1 ;

[0035] (2) Under vacuum conditions, filter the suspended slurry on the filter cloth within 30s, remove the wet cellulose membrane from the filter cloth and put it in a vacuum oven at 60°C for 48 hours to obtain a dried porous cellulose membrane;

[0036] (3) Poly(methyl methacrylate-vinyl acetate) copolymer is dissolved in tetrahydrofuran at room temperature, and stirred to obtain a uniform solution;

[0037] (4) Soak the dried cellulose film in the obtained solution. After the cellulose film absorbs the solution to the maximum, it is taken out with tweezers, and the solvent is volatilized from the cellulose film to obtain a polymeric film based on the cellulose film. Compound complex, and then placed in a vacuum oven at 70 ° C...

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Abstract

The invention discloses a matrix gel polymer electrolyte adopting the plant cellulose membrane and a preparation method thereof. The matrix gel polymer electrolyte is characterized in that: (1) the ingredients: the cellulose is made from straw, waste paper and wood waste; the polymer comprises the types of polyether, polyacrylate, polyacrylonitrile, polyvinylidene fluoride, polyphosphazene, polyvinyl acetate and the like; lithium salt in a liquid electrolyte comprises lithium perchlorate and lithium hexafluorophate; a plasticizer in the liquid electrolyte comprises ethylene carbonate, propylene carbonate, dimethyl carbonate and diethyl carbonate; (2) the technique: the preparation method comprises the following steps: carrying out membrane formation on cellulose pulp; reacting the cellulose pulp with the polymer to form a compound; enabling the compound to absorb the liquid electrolyte to obtain the matrix gel polymer electrolyte. The preparation method has the benefits that the problems that the gel polymer electrolyte membrane is low in mechanical property, and factory large-scale membrane formation cannot be realized are solved, and feasibility is provided for the development of electrolyte lithium ion battery products; by introducing straw, waste paper and wood waste into the field of batteries, wide prospects are provided for developing the resources.

Description

technical field [0001] The invention relates to a plant cellulose membrane matrix gel polymer electrolyte for a lithium ion battery and a preparation method thereof. Background technique [0002] At present, most of the lithium-ion battery products on the market use liquid electrolyte materials. This is because liquid electrolytes have high ionic conductivity and good compatibility with electrodes, which can endow batteries with good electrochemical performance. However, the liquid electrolyte brings a series of problems to the battery, such as poor safety and stability, liquid leakage, explosion, and limited battery shape design. On this basis, an all-solid polymer electrolyte was developed, which completely solved the safety problem and gave the lithium-ion battery the maximum space for shape design, but the inherent movement restriction of the polymer brought low ion density. Conductivity and poor compatibility with electrodes and other issues. Therefore, a large number...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/058
CPCH01M10/0565H01M10/058H01M2300/0025Y02E60/10Y02P70/50
Inventor 黄韵黄锐林元华杨满唐水花李星周莹
Owner SOUTHWEST PETROLEUM UNIV
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