Polymer electrolyte for polymer battery and preparation method of polymer electrolyte

A polymer and electrolyte technology, applied in the field of electrolytes, can solve the problems that polymers cannot be shaped and are not easy to reprocess, and achieve good mechanical properties, improve mechanical strength, and meet the effects of mechanical properties.

Active Publication Date: 2018-01-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cross-linking method has the disadvantage of not being easily reprocessed, so the polymer cannot be reshaped by heating

Method used

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  • Polymer electrolyte for polymer battery and preparation method of polymer electrolyte
  • Polymer electrolyte for polymer battery and preparation method of polymer electrolyte
  • Polymer electrolyte for polymer battery and preparation method of polymer electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Under an ice-water bath, mix dichlorodimethylsilane, dichloromethylphenylsilane, dichloromonomethylsilane, ether, polyethylene glycol (molecular weight 400), boric acid and water, and the mass of the mixture is The number of parts is: dichlorodimethylsilane: dichloromethylphenylsilane: dichloromonomethylsilane: ether: polyethylene glycol: boric acid: water = 1:0.5:0.25:2.5:0.8:0.15:0.2 , to obtain the first solution;

[0040] (2) The temperature of the first mixed solution was raised to 40° C., and reacted for 6 hours under a vacuum of 0.1 bar to obtain the second mixed solution;

[0041] (3) The temperature of the second mixed solution was raised to 60° C., and the volatile components were distilled for 2 hours under a vacuum of 0.5 bar to obtain the first mixture;

[0042] (4) Xylene, lithium perchlorate and lithium borate are added in the first mixture, the mass fraction of mixing is: first mixture: xylene: lithium perchlorate: lithium borate=1:0.8:0.1:0.1, mix...

Embodiment 2

[0045] (1) At room temperature, mix dichlorodimethylsilane, dichlorodiphenylsilane, toluene, polypropylene glycol (molecular weight 600), tributyl borate and water, and the mixed mass parts are: dichlorodimethylsilane Base silane: dichlorodiphenylsilane: toluene: polypropylene glycol: tributyl borate: water=1:0.15:4:2.5:0.5:0.5, obtain the first solution;

[0046] (2) The temperature of the first mixed solution was raised to 60° C., and reacted for 2 hours under a vacuum of 0.4 bar to obtain the second mixed solution;

[0047] (3) The temperature of the second mixed solution was raised to 100° C., and the volatile components were distilled for 0.5 hours under a vacuum of 0.9 bar to obtain the first mixture;

[0048] (4) Add toluene and lithium perchlorate in the first mixture, the mass parts of mixing are: the first mixture: toluene: lithium perchlorate=1:1.8:0.26, mix 4 hours at 90 ℃, obtain the second mixture;

[0049] (5) The temperature of the second mixture was raised t...

Embodiment 3

[0051] (1) Under ice-water bath, dichlorodimethylsilane, tetrahydrofuran, polytetrahydrofuran (molecular weight 800), trimethyl borate and water are mixed, and the mass parts of mixing are: dichlorodimethylsilane: tetrahydrofuran: poly THF: trimethyl borate: water=1:0.6:2:0.28:0.06, to obtain the first solution;

[0052] (2) The temperature of the first mixed solution was raised to 50° C., and reacted for 3 hours under a vacuum of 0.2 bar to obtain the second mixed solution;

[0053] (3) The temperature of the second mixed solution was raised to 70° C., and the volatile components were distilled for 2 hours under a vacuum of 0.5 bar to obtain the first mixture;

[0054] (4) Add ethyl acetate and lithium perchlorate to the first mixture, the mass parts of mixing are: first mixture: ethyl acetate: lithium perchlorate=1:1.1:0.3, mix at 70°C for 6 hours , to obtain the second mixture;

[0055] (5) The temperature of the second mixture was raised to 70° C., and the volatile compo...

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Abstract

The invention relates to a polymer electrolyte for a polymer battery and a preparation method of the polymer electrolyte, and belongs to the technical field of an electrolyte. The polymer electrode prepared by the method comprises four constituents of polyether, polysiloxane, a boron crosslinking (the former is a chemical constituent) and a conductive salt, and a part of polysiloxane chain segments are connected by Si-O-B bonds. The Si-O-B bonds of a polymer form crosslinking points of a system, the mechanical strength of the polymer can be improved, and the thermoplasticity of the polymer also can be maintained. According to the preparation method of the polymer electrode for the polymer battery, a polycondensation principle is mainly employed, the situation that the dependence on a feeding ratio is smaller than that of a traditional polycondensation method is determined by a special molecule structure, such as polyester; and by dynamic crosslinking, the polymer shows a solid state, the crystallinity of the polymer is reduced, thermal processing under a high temperature also can be performed, thus, by the preparation method, the molecular weight of the polymer is increased at a low cost, and the polymer has better dynamic performance.

Description

technical field [0001] The invention relates to a polymer electrolyte for a polymer battery and a preparation method thereof, which is mainly oriented to applications in the technical fields of lithium batteries, fuel cells, supercapacitors and other batteries and electronic equipment, and belongs to the technical field of electrolytes. technical background [0002] From the perspective of the development prospect of batteries, there is a development trend of lightweight batteries without reducing the safety factor. Lithium batteries have the advantages of high voltage, high specific capacity, wide operating temperature range and long storage time, which are in line with the development trend of batteries. The fly in the ointment is that during the charging process of the lithium battery, due to the uneven electrode surface, the surface potential distribution is uneven, which leads to the uneven deposition of metal lithium and the formation of lithium dendrites. The formati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M8/10H01M8/1037H01M8/1072H01G11/56
CPCY02E60/10Y02E60/50
Inventor 徐军周天宇郭宝华
Owner TSINGHUA UNIV
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