Preparation method of HNTs plasticized PAN/P(LLA-EG-MA) polymer electrolyte and product thereof

A LLA-EG-MA, polymer technology, applied in the field of preparation of HNTs plasticized PAN/P polymer electrolyte, can solve problems affecting the electrochemical stability and safety of batteries, uneven distribution of polymer membrane pores, difficult To ensure that the solvent is removed and other problems, to achieve the effect of improving electrochemical performance, uniform thickness and fiber diameter size distribution, and increasing shaping

Active Publication Date: 2021-04-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing methods for preparing polymer electrolyte membrane skeletons mainly include solution casting method, extraction activation method, phase separation / inversion method, etc. Among them, the solution casting method is to dissolve the polymer in a conventional solvent and then pour it into a specific mold. Solvent removal is difficult to ensure due to solvation of lithium salts
The extraction activation method is to add a plasticizer to the polymer solution system, and then use a solvent to extract and remove the plasticizer to obtain a polymer porous film after casting the film. The polymer film obtained by this method has uneven distribution of pores; phase separation The / inversion method avoids the extraction process of the plasticizer, and the obtained polymer gel electrolyte has good electrochemical and mechanical properties, but the residual solvent will affect the electrochemical stability and safety of the battery

Method used

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  • Preparation method of HNTs plasticized PAN/P(LLA-EG-MA) polymer electrolyte and product thereof
  • Preparation method of HNTs plasticized PAN/P(LLA-EG-MA) polymer electrolyte and product thereof
  • Preparation method of HNTs plasticized PAN/P(LLA-EG-MA) polymer electrolyte and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation of this kind of HNTs plasticized PAN / P (LLA-EG-MA) biogel polymer electrolyte provided by the invention comprises the following steps:

[0038] (1) Weigh 1g of HNTs and add it to 500ml of 1M HCl solution, stir at room temperature for 12h, centrifuge, test the pH value of the supernatant after centrifugation, until the pH of the supernatant is 6, put the acidified HNTs under vacuum at 60°C Dry for 12 hours;

[0039] (2) Weigh 0.2g of the acidified HNTs powder in step (1) and add it to 50ml of deionized water, stir at room temperature to obtain a milky white HNTs suspension, and add 1.5ml of 3-(methacryloyloxy)propyltrimethoxysilane (MPS ) adding HNTs suspension under stirring condition, transferring to Erlenmeyer flask, condensing and reflux reaction at 80°C and 250r / min for 4h;

[0040] (3) Centrifugally wash the HNTs-MPS milky white solution obtained in step (2) with absolute ethanol and deionized water several times, and dry it in a vacuum oven at 60°...

Embodiment 2

[0050] The preparation of this kind of HNTs plasticized PAN / P (LLA-EG-MA) biogel polymer electrolyte provided by the invention comprises the following steps:

[0051] (1) Weigh 1g of HNTs and add it to 500ml of 1M HCl solution, stir at room temperature for 30h, centrifuge, test the pH value of the supernatant after centrifugation, until the pH of the supernatant is 7, put the acidified HNTs under vacuum at 60°C Dry for 18 hours;

[0052] (2) Weigh 0.2g of the acidified HNTs powder in step (1) and add it to 50ml of deionized water, stir at room temperature to obtain a milky white HNTs suspension, and add 2ml of 3-(methacryloyloxy)propyltrimethoxysilane (MPS) Add the HNTs suspension under the condition of stirring, transfer to the Erlenmeyer flask, condense and reflux for 8 hours under the condition of 100°C and 250r / min;

[0053] (3) Centrifugally wash the HNTs-MPS milky white solution obtained in step (2) with absolute ethanol and deionized water several times, and dry it in ...

Embodiment 3

[0062] The preparation of this kind of HNTs plasticized PAN / P (LLA-EG-MA) biogel polymer electrolyte provided by the invention comprises the following steps:

[0063] (1) Weigh 1g of HNTs and add it to 500ml of 1M HCl solution, stir at room temperature for 48h, centrifuge, test the pH value of the supernatant after centrifugation, until the pH of the supernatant is 7, put the acidified HNTs under vacuum at 60°C Dry for 24 hours;

[0064] (2) Weigh 0.2g of the acidified HNTs powder in step (1) and add it to 50ml of deionized water, stir at room temperature to obtain a milky white HNTs suspension, and add 3ml of 3-(methacryloyloxy)propyltrimethoxysilane (MPS) Add the HNTs suspension under stirring condition, transfer to the Erlenmeyer flask, condense and reflux reaction at 120°C and 250r / min for 12h;

[0065] In the step (1), the concentration of hydrochloric acid is 0.5-1.5M, the concentration of HNTs in hydrochloric acid is 1-3g / L; the setting time is 12-48h, the drying tempe...

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Abstract

The invention discloses a preparation method of an HNTs plasticized PAN / P(LLA-EG-MA) polymer electrolyte and a product thereof. An HNTsPAN / P(LLA-EG-MA) cross-linked polymer film is prepared by adopting an electrostatic spinning method, a porous polymer film is formed by mutually overlapping nanofibers, formed pores can provide a good ion channel, the nanofibers are easily activated and gelled by a liquid electrolyte, and meanwhile, the method can effectively regulate and control the fine structure of the fibers. Chemical bonds and hydrogen bonds exist between molecules of the prepared HNTsPAN / P(LLA-EG-MA) cross-linked polymer film, the HNTsPAN / P(LLA-EG-MA) cross-linked polymer film has high structural stability, the thickness of a framework membrane of the blended polymer electrolyte and the diameter size of fibers are uniformly distributed, the HNTsPAN / P(LLA-EG-MA) cross-linked polymer membrane has good amorphism, economy and environmental protection, and the preparation method is high in practicability and has a good industrial prospect.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a preparation method of HNTs plasticized PAN / P (LLA-EG-MA) polymer electrolyte and a product thereof. Background technique [0002] Compared with inorganic solid electrolytes, gel polymer electrolytes not only have good mechanical properties of solid electrolytes, but also have high ionic conductivity of liquid electrolytes. Therefore, lithium ions in the gel polymer electrolyte can be transported not only by the movement of the polymer chain, but also by the swollen gel phase or liquid phase. Gel polymers are considered to be the best candidates to replace commercial liquid electrolytes. [0003] Polyacrylonitrile (PAN) is widely used in the construction of polymer electrolyte matrix materials due to its high ionic conductivity and electrochemical oxidation resistance. At the same time, at 298K, the ionic conductivity of the gel polymer electrolyte constructed by i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0565D04H1/4382D04H1/728D06M13/438D01F6/92D01F1/10D06M101/32
CPCH01M10/058H01M10/0565D04H1/4382D04H1/728D06M13/438D01F6/92D01F1/10H01M2300/0088D06M2101/32Y02E60/10Y02P70/50
Inventor 潘安强柴思敏
Owner CENT SOUTH UNIV
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