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A kind of preparation method of sandwich structure solid state electrolyte

A solid electrolyte and sandwich technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve problems such as battery short circuit, achieve the effects of preventing battery short circuit, improving mechanical properties, and increasing stiffness

Inactive Publication Date: 2020-01-31
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While silicon dioxide (SiO 2 ) tube due to its two-dimensional structure can more effectively reduce the crystallinity of polyethylene oxide (PEO), but due to its conductivity to electrons, if the SiO 2 Tube / PEO composite may cause short circuit of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] At room temperature, 10ml of 2molK 2 CO 3 The aqueous solution was added to 400ml of DMF aqueous solution, and 2mmol of tris(4-bromophenyl)amine and 3mmol of benzenediboronic acid were sequentially added under a nitrogen atmosphere, and the solution was heated to 110°C under stirring conditions, and then 50mg of palladium catalyst was added to react for 24h, and ethanol and acetone were used to remove Ionized water is filtered and washed, and ethanol and tetrahydrofuran are subjected to Soxhlet extraction to obtain benzidine polymer benzidine derivatives. The obtained benzidine derivative particles were dried in a vacuum oven at 50°C for 12 hours. benzidine derivatives, PEO and LiClO 4 Mix in an agate mortar with a mass ratio of 7:8:5, disperse in 10ml DMF after slight grinding, and stir at 60°C for 12h to obtain a yellow-green suspension; at room temperature, crystallize 700mgPEO and 100mg nano-SiO 2 The tube was added into deionized water to form a dilute solution....

Embodiment 2

[0017] At room temperature, add 10ml of 2mol K2CO3 aqueous solution to 400ml of DMF aqueous solution, add 2mmol of tris(4-bromophenyl)amine and 3mmol of benzenediboronic acid successively under nitrogen atmosphere, heat the solution to 110°C under stirring conditions, and then add 50mg of palladium The catalyst was reacted for 24 hours, filtered and washed with ethanol, acetone and deionized water, and subjected to Soxhlet extraction with ethanol and tetrahydrofuran to obtain benzidine polymer benzidine derivatives. The obtained benzidine derivative particles were dried in a vacuum oven at 50°C for 12 hours. Mix benzidine derivatives, PMMA and LiTFSI in an agate mortar at a mass ratio of 6:9:4, disperse in 10ml of DMF after slight grinding, and stir at 60°C for 12h to obtain a yellow-green suspension; , adding 700 mg of PMMA crystals and 100 mg of aluminum oxide into deionized water to form a dilute solution, adjusting the pH to 10, adding TEOS drop by drop, and hydrolyzing at...

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Abstract

The invention relates to a secondary battery, in particular to a rechargeable lithium battery, which is applied in the technical field of electrochemical energy storage devices. The invention provides a method for synthesizing benzidine derivatives with a novel polymerization method, and then compounding them with an electrolyte membrane containing nano silicon dioxide tubes or aluminum oxide to realize the preparation of a sandwich-structured solid electrolyte. The invention has simple preparation process, high safety, low requirements on equipment and process conditions, and is favorable for popularization and application.

Description

technical field [0001] The invention relates to a secondary battery, in particular to a rechargeable lithium battery, which is applied in the technical field of electrochemical energy storage devices. Background technique [0002] With the rapid development of portable electronic devices and emerging wearable technologies, there is an increasing demand for chemical power sources with high energy density, and battery systems have gradually become the performance bottleneck in electronic devices. Among the current commercial high-energy-density battery systems, lithium-ion batteries occupy a dominant position in the market due to their high energy density, but their energy density is approaching the theoretical limit. It is of great significance to develop next-generation battery systems with higher energy density. [0003] With the practical development of lithium-ion batteries, defects such as leakage, flammability, and explosion of traditional liquid electrolytes in the ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/058
CPCH01M10/0565H01M10/058Y02E60/10Y02P70/50
Inventor 刘瑞平贺鹏吴子睿
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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