Boron-containing solid polymer electrolyte and preparation method and application thereof

A solid polymer, electrolyte technology, applied in the direction of hybrid capacitor electrolytes, circuits, fuel cells, etc., can solve the problems of explosive, poor transmission performance, unsatisfactory processing performance and other problems, achieve high degree of dissociation, excellent cycle performance, The effect of a wide electrochemical stability window

Inactive Publication Date: 2016-12-14
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to solving the problems of traditional battery leakage and poor safety, flammability and explosion, solid polymer electrolytes have been well applied in lithium-ion secondary batteries, but the ion transport performance of previous polymer electrolytes is relatively poor. Poor, mechanical properties, processing properties can not be satisfied

Method used

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  • Boron-containing solid polymer electrolyte and preparation method and application thereof
  • Boron-containing solid polymer electrolyte and preparation method and application thereof
  • Boron-containing solid polymer electrolyte and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 21.75 mmol of bis(trifluoromethyl)phenylboronic acid (BPBA), 21.75 mmol of 3-allyloxy-1,2-propanediol (GAE), 20 g of 4Å molecular sieves, and 200 ml of anhydrous dichloromethane into a 500 ml three-port In the beaker, pass inert gas for protection, and keep stirring the solution for more than 24h. The mixture was suction-filtered more than 3 times, and then washed with a neutral alumina column to obtain a dichloromethane solution of pure alkene boron-containing heterocyclic monomer (GAE-BPBA). After rotary evaporation, the pure light yellow monomer (GAE-BPBA) was obtained, and its yield was approximately equal to 1.

[0034] Take 2ml of the above-mentioned monomer GAE-BPBA, the content of the initiator (BPO) is 0.5%-1%, and 20ml of solvent N,N-dimethylformamide (DMF) into a 50ml three-necked flask, under the protection of inert gas, After free radical reaction at 85°C for 6-8h, the resulting mixture was precipitated with anhydrous petroleum ether to obtain a white ...

Embodiment 2

[0036]Add 21.75 mmol of bis(trifluoromethyl)phenylboronic acid (BPBA), 21.75 mmol of 3-allyloxy-1,2-propanediol (GAE) and 100 ml of anhydrous toluene into the In a 200ml three-necked beaker, remove water azeotropically for 6-8 hours at a temperature of 130-145°C. The mixture was suction-filtered more than 3 times, and then washed with a neutral alumina column to obtain a pure alkene boron-containing heterocyclic monomer (GAE-BPBA) in toluene. After rotary evaporation, the pure light yellow monomer (GAE-BPBA) was obtained, and its yield was approximately equal to 1.

[0037] Take 2ml of the above-mentioned monomer GAE-BPBA, the content of the initiator (BPO) is 0.5%-1%, and 20ml of solvent N,N-dimethylformamide (DMF) into a 50ml three-necked flask, under the protection of inert gas, After free radical reaction at 85°C for 6-8h, the resulting mixture was precipitated with anhydrous petroleum ether to obtain a white powder, which was dried in vacuum at 40°C for 24h to obtain dry...

Embodiment 3

[0039] Accurately weigh 2ml of GAE-BPBA containing boron heterocycloalkene monomer, and the electrolyte solution is 2M LiClO 4 DMF solution, the amount of lithium perchlorate added is 10% of the monomer mass fraction, and the content of initiator (BPO) is 0.5%-1%. After stirring evenly at room temperature (2-3h), cast the mixture into a 0.5mm thick PTFE mold, then place it in a high-purity nitrogen-protected drying oven, and react at 85°C for 6-8h. After cooling to room temperature, the obtained polymer film was placed in a freeze dryer, and traces of organic solvents were removed at -80°C for more than a week. Finally, a boron-containing solid polymer electrolyte is obtained, and the thickness of the film is 150-200 μm. The conductivity of the polymer electrolyte was measured using a sandwich structure that was assembled in a 2016 button cell in the order of stainless steel / polymer electrolyte / stainless steel. The AC impedance spectrum of the polymer electrolyte was tested,...

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Abstract

The invention belongs to the technical field of an electrolyte material, especially a boron-containing solid polymer electrolyte and a preparation method and application thereof. The polymer electrolyte provided by the invention comprises high molecular polymer matrix and electrolyte salt. The preparation method comprises the steps of esterifying boric acid-containing compounds and alkene compounds with diol structures, thereby obtaining boron heterocycle-containing vinyl monomer, uniformly dispersing the boron heterocycle containing vinyl monomer, initiator, the electrolyte salt and organic solvent, carrying out free radical polymerization, and drying obtained mixture, thereby obtaining the boron-containing solid polymer electrolyte. The boron-containing solid polymer electrolyte has the advantages of high ion conductivity, high cation transference number, good mechanical property and excellent electrode / electrolyte interface interaction and can be applied to fields such as a supercapacitor, a lithium ion battery, a hybrid supercapacitor and a fuel battery. The supercapacitor assembled with the polymer electrolyte has the advantages of wide electrochemical window, long cycle life and high security.

Description

technical field [0001] The invention belongs to the technical field of electrolyte materials, and in particular relates to a boron-containing solid polymer electrolyte and a preparation method and application thereof. Background technique [0002] In recent years, lightweight and miniaturized new energy devices have become more and more common, and the application of batteries in notebook computers, mobile phones, charging treasures, electric vehicles, and drones has received more and more attention. Electrolyte is one of the important components of energy storage devices such as supercapacitors and lithium-ion batteries. Its main function is to provide ions that can be transported or as a channel for ion transport. Traditional electrolytes are mainly organic electrolyte systems. Under liquid conditions, the conductivity of ions is particularly high. However, organic systems have the defects of high temperature, flammability, explosion, and liquid leakage. Compared with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0564H01M10/0565H01G11/56H01M8/1018H01M8/1069
CPCH01G11/56H01M8/1018H01M8/1069H01M10/0564H01M10/0565Y02E60/10Y02E60/13Y02E60/50
Inventor 马晓华袁平秦玉琪郭艳辉田文生
Owner FUDAN UNIV
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