A solid polymer electrolyte membrane material with continuous ion transfer nanochannels and its preparation method

A technology of electrolyte membrane material and solid polymer is applied in the field of solid polymer electrolyte membrane material and its preparation to achieve the effect of high electrical conductivity at room temperature, good mechanical properties and good mechanical strength

Active Publication Date: 2020-02-21
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, from these examples, we can also see that this method of forming continuous channels by annealing is only suitable for polymer systems with high PEO / MPEG molecular weight or content, and the low-temperature crystallinity of PEO / MPEG limits its use conditions. is a high temperature environment

Method used

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  • A solid polymer electrolyte membrane material with continuous ion transfer nanochannels and its preparation method
  • A solid polymer electrolyte membrane material with continuous ion transfer nanochannels and its preparation method
  • A solid polymer electrolyte membrane material with continuous ion transfer nanochannels and its preparation method

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Effect test

Embodiment 1

[0038] A solid polymer electrolyte membrane material with continuous ion-transfer nanochannels, which is a comb copolymer (molecular weight of 5,000 to 20,000, wherein The MPEG content is 30wt%, and the relative molecular weight of MPEG is 350). The micelles formed by self-assembly are fused with lithium salt, and the film formed by cross-linking; wherein the micelles are spherical or ellipsoidal in shape, and the size range is about 50nm-500nm.

[0039] The above-mentioned preparation method of the solid polymer electrolyte membrane material with continuous ion transfer nanochannels, the steps are as follows:

[0040] (1) Accurately weigh 0.05g PCOE-g-MPEG (MPEG relative molecular mass is 350, mass fraction is 30%) comb polymer is dissolved in 10g dry co-solvent CH 2 Cl 2 In, obtain the comb copolymer solution that mass fraction is 5 ‰;

[0041] (2) Measure 7.5ml of selective solvent ethanol, add the above-mentioned comb copolymer solution dropwise under stirring at room te...

Embodiment 2

[0049] A method for preparing a solid polymer electrolyte membrane material with continuous ion transfer nanochannels, the steps are as follows:

[0050] (1) Accurately weigh 0.05g PCOE-g-MPEG (MPEG relative molecular mass is 350, mass fraction is 30%) comb polymer is dissolved in 10g dry co-solvent CH 2 Cl 2 In, obtain the solution that mass fraction is 5 ‰;

[0051] (2) Measure 7.5ml of selective solvent ethanol, and add the above solution dropwise under stirring at room temperature, so that the final volume ratio of selective solvent to co-solvent is 1:1;

[0052] (3) Transfer the solution obtained in (2) into a dialysis bag with a molecular weight cut-off of 3500, and dialyze in a large amount of ethanol solution for 3 to 5 days, during which time the dialysate is replaced;

[0053] (4) After the dialysis is completed, fully shake the obtained micellar emulsion, add 0.010g of anhydrous lithium perchlorate to make [Li] / [EO] 1:4, and evaporate the solvent at room temperatu...

Embodiment 3

[0056] A method for preparing a solid polymer electrolyte membrane material with continuous ion transfer nanochannels, the steps are as follows:

[0057] (1) Accurately weigh 0.05g PCOE-g-MPEG (MPEG relative molecular mass is 350, mass fraction is 30%) comb polymer is dissolved in 10g dry co-solvent CH 2 Cl 2 In, obtain the solution that mass fraction is 5 ‰;

[0058] (2) Measure 7.5ml of selective solvent ethanol, and add the above solution dropwise under stirring at room temperature, so that the final volume ratio of selective solvent to co-solvent is 1:1;

[0059] (3) Transfer the solution obtained in (2) into a dialysis bag with a molecular weight cut-off of 3500, and dialyze in a large amount of ethanol solution for 3 to 5 days, during which time the dialysate is replaced;

[0060] (4) After the end of dialysis, fully shake the obtained micellar emulsion, add 0.003g of anhydrous lithium perchlorate to make [Li] / [EO] 1:12, and evaporate the solvent at room temperature to...

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Abstract

The invention relates to a solid-state polymer electrolyte membrane material with continuous ion transfer nanometer channels. The solid-state polymer electrolyte membrane material is a membrane prepared from spherical micelle, which is formed by amphiphilic polymers in a self-assembling way, through fusing and crosslinking; the preparation method comprises the steps of selecting one kind of cosolvent and preparing PCOE-g-MPEG comb-shaped copolymer solution with a certain concentration; selecting one kind of selective solvent, stirring and slowly adding into the comb-shaped copolymer solution; performing dialysis on the obtained mixed solution; weighing a certain amount of lithium salt and adding into the dialysed micelle solution, and performing condensation on a volatile solvent to obtain flocculent accumulated micelle; and performing heat treatment in a drying oven to obtain the solid-state polymer electrolyte membrane. The obtained solid-state polymer electrolyte membrane can form continuous ion transfer channels when the MPEG content is relatively low, so that relatively high electrical conductivity and high mechanical performance can be maintained.

Description

technical field [0001] The invention relates to a solid polymer electrolyte membrane material with continuous ion transfer nano-channels and a preparation method thereof, belonging to the field of preparation of lithium ion solid polymer electrolyte membrane materials. Background technique [0002] Lithium-ion batteries are widely used in various consumer electronics products due to their high energy density, fast charge and discharge, etc. The electrolyte used is mainly electrolyte containing lithium salt, which is easy to leak, flammable and explosive, etc. Security risks. Therefore, solid polymer electrolytes with excellent safety and stability have emerged as the times require, and have begun to receive extensive attention and research. [0003] Among many solid polymer electrolytes, polymer electrolytes based on polyethylene glycol (PEO) and polyethylene glycol monomethyl ether (MPEG) are considered because of their relatively high electrochemical stability and ionic c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/0525C08J5/18C08J3/24
CPCC08J3/24C08J5/18C08J2351/08H01M10/0525H01M10/0565H01M2300/0082Y02E60/10
Inventor 施德安何云纪肖肖张新立吴京
Owner HUBEI UNIV
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