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A kind of titanium oxygen cluster -based solid -state polymer electrolyte and its preparation methods and applications

A technology of solid polymers and electrolytes, applied in the manufacture of electrolyte batteries, electrolytes, non-aqueous electrolyte batteries, etc., can solve problems such as hindering electrolyte ion conductivity and weak interaction, so as to inhibit the growth of lithium dendrites and prolong cycle life , to overcome the effect of low ionic conductivity

Active Publication Date: 2021-12-17
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has significant drawbacks, such as: the crystalline part of the polymer remains, the agglomeration of ceramic particles, and the weak polymer-ceramic interaction
These problems hinder the further improvement of the ionic conductivity of the electrolyte by fillers

Method used

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  • A kind of titanium oxygen cluster -based solid -state polymer electrolyte and its preparation methods and applications
  • A kind of titanium oxygen cluster -based solid -state polymer electrolyte and its preparation methods and applications
  • A kind of titanium oxygen cluster -based solid -state polymer electrolyte and its preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) First weigh 1G m n = 2000G mol -1 The polytetrahydrofuran is dispersed in 1 mL N, N-dimethylformamide, and 168 μl of hexamethylene diisocyanate and 15 μl of Dikutanikhalate, stirred at 30 ° C for 2 hours to obtain a uniform and transparent solution.

[0036] 2) Will 50mg Ti 32 (μ) 2 -O) 8 (μ) 3 -O) 8 (OCH) 2 CH 2 O) 32 (RCOO) 16 (OCH) 2 CH 2 OH) 16 (R = ethyl) was dispersed in 1 ml n, N-dimethylformamide, and the reaction liquid obtained from step 1) was added, and the reaction was stirred at 30 ° C for 5 h to obtain a uniformly transparent solution, that is, a polymeric matrix solution.

[0037] 3) According to the EO: Li molar ratio of 16: 1, double trifluoromethylsulfonimide, add 10 wt.% Plasticic carbonate, dispersed at 2 ml N, N-dimethylformamide. The mixed solution was added to step 2), and the reaction mixture was stirred at 30 ° C to obtain a uniform and transparent solution at 30 ° C.

[0038] 4) The solution obtained by step 3) was scraped in the polytetrafluoroe...

Embodiment 2

[0041] 1) First weigh 1G m n = 2000G mol -1 The polyethylene glycol was dispersed in 10 mL of dichloromethane, and 100 μl of hexamethylene diisocyanate was added and 5 μl of dibutyltin, and the reaction was stirred at 30 ° C for 5 hours to obtain a uniform and transparent solution.

[0042] 2) Ten mg Ti 6 O 6 (OCH) 3 ) 6 (AB) 6 In 1 ml of dichloromethane, it was added to the reaction liquid obtained from step 1), and the reaction was stirred at 30 ° C for 10 h to obtain a uniform and transparent solution, that is, a polymer matrix solution.

[0043] 3) According to the EO: Li molar ratio of 12: 1, the double trifluoromethylsulfonimide, dispersed in a mixed solution of 5 ml of acetonitrile and dichloromethane, wherein the volume ratio of acetonitrile and dichloromethane is 1: 1. , The reaction liquid obtained by adding to step 2), the reaction is stirred at 30 ° C for a uniform and transparent solution.

[0044] 4) The solution obtained from step 3) was scraped in the polytetrafluo...

Embodiment 3

[0046] 1) First weigh 2G m n = 4000g Mol -1 The polyethylene glycol was dispersed in 0.5 ml of dimethylacetamide, and 202 μl of lysine diisocyanate and 30 μl of dibutyltin, stirred at 30 ° C for 1 h to obtain a uniform and transparent solution.

[0047] 2) Put 100 mg Ti 4 O 2 (O i Bu) 10 (ABZ) 2 In 1 ml of dimethylacetamide, it was added to the reaction liquid obtained from step 1), and the reaction was stirred at 30 ° C to obtain a uniform and transparent solution, ie the polymer matrix solution.

[0048] 3) According to the EO: Li molar ratio of 20: 1, lithium boric acid acid acid, add 20 wt.% Plasticic acid carbonate, dispersed in a mixed solution of 2 ml acetonitrile and dimethylacetamide, wherein acetonitrile and acetonitrile The volume ratio of the based on the acetamide was 1: 1, added to step 2), and the reaction was stirred at 30 ° C for 5 hours to obtain a uniform and transparent solution.

[0049] 4) The solution obtained by step 3) is scraped in the polytetrafluoride m...

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Abstract

The invention relates to a titanium oxide cluster-based solid polymer electrolyte and its preparation method and application. This method uses titanium oxide clusters as the medium to organically combine the two modification methods of composite electrolyte and polymer structure in solid polymer electrolytes, and can use the functional group-rich titanium oxide clusters to overcome the low ion conductivity of traditional polymer electrolytes. problems, and can transform the traditional chain polymer into a three-dimensional network structure, thereby improving the mechanical strength of the electrolyte. The obtained solid polymer electrolyte has the advantages of high mechanical strength, good thermal stability, high ionic conductivity and wide electrochemical window; it can effectively inhibit the growth of lithium dendrites when used in lithium metal batteries, prolong the battery cycle life, and can obtain A solid-state lithium metal battery with significantly improved specific capacity and cycle life.

Description

Technical field [0001] The present invention belongs to the field of solid-state polymer electrolyte, and more particularly to a synthetic method of cross-linking three-dimensional mesh solid polymer electrolyte, and its application in the field of solid lithium metal batteries. Background technique [0002] As a negative electrode material, lithium metal theoretical specific capacity (3860mAh g -1 ) Close to graphite negative electrode (372mAh g) -1 10 times, and have the lowest electrochemical potential (-3.04V vs. standard hydrogen electrode) and low density (0.53 g cm -3 Other advantages. Therefore, the lithium metal is considered to be expected to substituize the negative electrode material of the next generation of high energy density secondary batteries. Lithium metal electrodes (e.g., sulfur, oxygen, air) or layered positive electrode material, is the hotspot direction of current secondary battery research. [0003] However, lithium is easy to form dendrites during electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/0565H01M10/052H01M10/42
CPCH01M10/058H01M10/0565H01M10/052H01M10/4235H01M2300/0085H01M2300/0091Y02E60/10Y02P70/50
Inventor 方晓亮解豪裴非郑南峰
Owner XIAMEN UNIV
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