Solid electrolyte with double conducting ion networks and preparation method of solid electrolyte

A solid electrolyte and ionic network technology, applied in the field of solid electrolyte and its preparation, can solve the problems of low electrical conductivity and poor mechanical properties, and achieve the effects of simple preparation process, good flexibility and improved mechanical properties

Active Publication Date: 2017-06-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of poor mechanical properties and low electrical conductivity of the existing polyphosphonitrile solid electrolyte, and to provide a double ion-conducting network with better mechanical properties, excellent film-forming properties and higher ionic conductivity. Solid electrolyte and preparation method thereof

Method used

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  • Solid electrolyte with double conducting ion networks and preparation method of solid electrolyte
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  • Solid electrolyte with double conducting ion networks and preparation method of solid electrolyte

Examples

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Effect test

Embodiment 1

[0023] (1) Lithium perchlorate and PAN (mass ratio 0.1: 1) are put into conical flask and add appropriate amount of solvent, be made into the spinning solution of high polymer mass fraction 10%; Then mass fraction is 5% ( The nanorods made of the inorganic solid electrolyte whose total mass is the mass of PAN and the filler) are added to the above solution, and fully stirred to make the mixture uniform.

[0024] (2) Electrospinning is carried out under the conditions of an injection speed of 1ml / h, a spinning voltage of 20kv, and the use of a roller to receive (roller speed 1000r / min);

[0025] (3) After spinning, put the electrospun film into an oven, and dry it at 60°C for 3-48 hours to completely volatilize the solvent. The resulting film was used for later use.

[0026] (4) Dissolve a certain amount of linear polyphosphazene (PDCP) in a quantitative THF solution, add Diethylene Glycol Monomethyl Ether (Diethylene Glycol Monomethyl Ether) to it after the PDCP is fully diss...

Embodiment 2

[0034] (1) Lithium perchlorate and PAN (mass ratio 0.1:1) are put into conical flask and add appropriate amount of solvent, be made into the spinning solution of high polymer mass fraction 10%; Then mass fraction is 15% ( The nanorods made of the inorganic solid electrolyte whose total mass is the mass of PAN and the filler) are added to the above solution, and fully stirred to make the mixture uniform.

[0035] (2) Electrospinning is carried out under the conditions of an injection speed of 1ml / h, a spinning voltage of 20kv, and the use of a roller to receive (roller speed 1000r / min);

[0036] (3) After spinning, put the electrospun film into an oven, and dry it at 60°C for 3-48 hours to completely volatilize the solvent. The resulting film was used for later use.

[0037] (4) Dissolve a certain amount of linear polyphosphazene (PDCP) in a quantitative THF solution, add Diethylene Glycol Monomethyl Ether (Diethylene Glycol Monomethyl Ether) to it after the PDCP is fully diss...

Embodiment 3

[0045] (1) Lithium perchlorate and PAN (mass ratio 0.1:1) are put into conical flask and add appropriate amount of solvent, be made into the spinning solution of high polymer mass fraction 10%; Then mass fraction is 25% ( The nanorods made of the inorganic solid electrolyte whose total mass is the mass of PAN and the filler) are added to the above solution, and fully stirred to make the mixture uniform.

[0046] (2) Electrospinning is carried out under the conditions of an injection speed of 1ml / h, a spinning voltage of 20kv, and the use of a roller to receive (roller speed 1000r / min);

[0047] (3) After spinning, put the electrospun film into an oven, and dry it at 60°C for 3-48 hours to completely volatilize the solvent. The resulting film was used for later use.

[0048] (4) Dissolve a certain amount of linear polyphosphazene (PDCP) in a quantitative THF solution, add Diethylene Glycol Monomethyl Ether (Diethylene Glycol Monomethyl Ether) to it after the PDCP is fully diss...

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Abstract

The invention relates to solid electrolyte with double conducting ion networks and a preparation method of the solid electrolyte, and solves the technical problem that existing polyphosphazene solid electrolyte is poor in mechanical property and low in conductivity. The solid electrolyte consists of a porous film and a polyphosphazene electrolyte material, wherein the porous film consists of a polymer, inorganic solid electrolyte and lithium salt; the porous film is a framework of the polyphosphazene electrolyte; and the polyphosphazene electrolyte is a carrier of lithium ions. The invention simultaneously provides a preparation method of the solid electrolyte. The solid electrolyte can be widely used in the field of preparation of the electrolyte.

Description

technical field [0001] The invention relates to the field of solid-state electrolytes for lithium-ion batteries, in particular to a solid-state electrolyte with a double ion-conducting network and a preparation method thereof. Background technique [0002] With the application of lithium-ion batteries in the field of energy storage, the safety of batteries has become the focus of attention. At present, most lithium-ion batteries use organic liquid electrolytes. The leakage and flammability of organic liquid electrolytes threaten the safety of batteries. Safety. In order to solve this problem, solid-state electrolytes came into being. The current solid-state electrolytes can be divided into polymer gel electrolytes, polymer all-solid-state electrolytes, and inorganic solid-state electrolytes. [0003] Polymer solid electrolytes have gradually become the focus of attention because they do not have the disadvantages of flammability and leakage of organic liquid electrolytes, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056
CPCH01M10/056H01M2300/0065Y02E60/10
Inventor 杨小平李昊于运花兰金叻蔡睛
Owner BEIJING UNIV OF CHEM TECH
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