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Carbon oxide ball doped solid polymer electrolyte membrane and preparation method and application thereof

A solid polymer and electrolyte membrane technology, applied in the field of lithium-ion batteries, can solve problems such as explosion, safety hazards that cannot be eradicated, and fire, and achieve the effects of simplifying the process, enhancing electrochemical stability, and improving ion conductivity

Active Publication Date: 2020-03-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this type of battery contains volatile and flammable liquid organic substances, there are safety hazards such as fire and explosion.
Gel electrolytes have similar ionic conductivity to liquid electrolytes, and have high interfacial compatibility with positive and negative electrodes. Compared with liquid electrolytes, they are safer, but they cannot eliminate potential safety hazards.

Method used

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  • Carbon oxide ball doped solid polymer electrolyte membrane and preparation method and application thereof
  • Carbon oxide ball doped solid polymer electrolyte membrane and preparation method and application thereof
  • Carbon oxide ball doped solid polymer electrolyte membrane and preparation method and application thereof

Examples

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Embodiment 1

[0045] This embodiment provides a method for preparing a solid polymer electrolyte membrane, which includes the following steps:

[0046] Step 1, adding carbon dioxide spheres to the organic solvent N,N-dimethylformamide (DMF) for ultrasonication, stirring magnetically to a uniform solution, and then adding the polymer matrix polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP ) stirred until uniformly obtained mixed solution;

[0047] Wherein, the mass ratio of the carbon dioxide spheres, the organic solvent DMF and the polymer matrix PVDF-HFP is 0.05:10:1;

[0048] Step 2: Pour the mixed solution into a smooth PTFE surface dish with a diameter of 10 cm, form a film by pouring, control the film thickness by pouring the mixed solution, control the pouring amount of the solution at about 8 to 10 g, and then After normal drying at 60°C for 6 hours, put it into a vacuum drying oven at 60°C for 24 hours to obtain a solid polymer electrolyte membrane with a thickness of about 50...

Embodiment 2

[0058] This embodiment provides the application expansion of solid polymer electrolyte membrane, in Li-O 2 The application in the battery, it comprises the following steps:

[0059] Step 1, adding carbon dioxide spheres to the organic solvent N,N-dimethylformamide (DMF) for ultrasonication, stirring magnetically to a uniform solution, and then adding the polymer matrix polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP ) stirred until uniformly obtained mixed solution;

[0060] Wherein, the mass ratio of the carbon dioxide spheres, the organic solvent DMF and the polymer matrix PVDF-HFP is 0.05:15:1;

[0061] Step 2: Pour the mixed solution into a smooth PTFE surface dish with a diameter of 10 cm, form a film by pouring, control the film thickness by pouring the mixed solution, control the pouring amount of the solution at about 8 to 10 g, and then After normal drying at 60°C for 6 hours, put it into a vacuum drying oven at 60°C for 24 hours to obtain a solid polymer elec...

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Abstract

The invention provides a carbon oxide ball doped solid polymer electrolyte membrane and a preparation method and application thereof. The preparation method comprises the following steps: adding carbon oxide spheres into an organic solvent, ultrasonically stirring to obtain a uniform solution, adding a polymer matrix, and uniformly stirring to obtain a mixed solution; and carrying out film formingtreatment on the mixed solution, and drying to obtain the solid polymer electrolyte membrane. The carbon oxide sphere doped solid polymer electrolyte prepared by the method has the advantages of better mechanical property, higher specific capacity, lower polarization voltage, stronger cycling stability and the like, and provides a new possibility for the development of solid polymers.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a solid polymer electrolyte membrane doped with carbon oxide spheres, a preparation method and application thereof. Background technique [0002] Lithium-ion batteries have the advantages of high power density, high energy density and no memory effect. They have been widely used in consumer electronics, medical electronics and other fields, and are gradually being used in emerging fields such as electric vehicles and energy storage. At present, lithium-ion batteries generally use LiPF 6 carbonate solution as an organic liquid electrolyte. Because such batteries contain volatile and flammable liquid organic substances, there are safety hazards such as fire and explosion. Gel electrolytes have similar ionic conductivity to liquid electrolytes, and have high interfacial compatibility with positive and negative electrodes. Compared with liquid electrolytes, gel electrol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525H01M10/058
CPCH01M10/0525H01M10/0565H01M10/058H01M2300/0082Y02E60/10Y02P70/50
Inventor 孙晖胡建勇施文可
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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