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Oxide type ceramic composite nanofiber solid electrolyte and electrostatic spinning preparation method thereof

A solid electrolyte and ceramic composite technology, applied in electrospinning, fiber processing, rayon manufacturing, etc., can solve the problem of affecting the ionic conductivity of composite solid electrolytes, affecting the ion-conducting effect of composite solid electrolytes, and the inability to form continuous ion transmission paths, etc. problem, to achieve the effect of easy control and realization of reaction conditions, good electrochemical performance and mechanical flexibility, and good electrochemical performance

Pending Publication Date: 2020-11-10
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the content of ceramic nanoparticle fillers in composite solid electrolytes is only 10-20wt%, because there is a huge difference in surface energy between inorganic ceramics and organic polymers, and ceramic nanoparticles are prone to agglomeration at high concentrations of ceramics , which seriously affects the overall ionic conductivity of the composite solid electrolyte
In addition, even at a low concentration of ceramics, since the ceramic nanoparticles are dispersed with each other, a continuous ion transport path cannot be formed, which also seriously affects the ion-conducting effect of the composite solid electrolyte.

Method used

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  • Oxide type ceramic composite nanofiber solid electrolyte and electrostatic spinning preparation method thereof
  • Oxide type ceramic composite nanofiber solid electrolyte and electrostatic spinning preparation method thereof
  • Oxide type ceramic composite nanofiber solid electrolyte and electrostatic spinning preparation method thereof

Examples

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Effect test

Embodiment 1

[0058] An electrospinning preparation method of an oxide-type ceramic composite nanofiber solid electrolyte, the specific steps of the method are as follows:

[0059] (1) Preparation of oxide-type ceramic nanoparticles: 0.0078mol C 6 h 8 o 7 ·H 2 O, 0.007mol LiOH, 0.003mol La(NO 3 ) 3 ·6H 2 O, 0.00175mol ZrO(NO 3 ) 2 ·xH 2 O, 0.00024mol Al(NO 3 ) 3 9H 2 O was dissolved in 10ml of deionized water to obtain a homogeneous solution under stirring and heating (50°C, the same below). After drying the sol at 250 °C for 3 h, a brown porous gel was obtained. calcining the dried gel in a muffle furnace at 850° C. for 2 hours in air to obtain oxide-type ceramic nanoparticles;

[0060] (2) Preparation of oxide-type ceramic composite nanofibers: Dissolve 0.8g polyvinylidene fluoride in 9.2g N,N-dimethylformamide solvent and stir at 60°C for 24h to obtain 8wt.% uniform polyvinylidene difluoride Vinyl fluoride solution; disperse 0.3g of ceramic nanoparticles in polyvinylidene f...

Embodiment 2

[0064] An electrospinning preparation method of an oxide-type ceramic composite nanofiber solid electrolyte, the specific steps of the method are as follows:

[0065] (1) Preparation of oxide-type ceramic nanoparticles: 0.0078mol C 6 h 8 o 7 ·H 2 O, 0.007mol LiOH, 0.003mol La(NO 3 ) 3 ·6H 2 O, 0.00175mol ZrO(NO 3 ) 2 ·xH 2 O, 0.00025mol NbCl 5 Dissolve in 10 ml of deionized water under stirring and heating to obtain a homogeneous solution. After drying the sol at 250 °C for 3 h, a brown porous gel was obtained. calcining the dried gel in a muffle furnace at 850° C. for 2 hours in air to obtain oxide-type ceramic nanoparticles;

[0066] (2) Preparation of oxide-type ceramic composite nanofibers: Dissolve 0.8g polyvinylidene fluoride in 9.2g N,N-dimethylformamide solvent and stir at 60°C for 24h to obtain 8wt.% uniform polyvinylidene difluoride Vinyl fluoride solution; disperse 0.2g ceramic nanoparticles in polyvinylidene fluoride solution, add 0.04g polyethylene oxi...

Embodiment 3

[0070] An electrospinning preparation method of an oxide-type ceramic composite nanofiber solid electrolyte, the specific steps of the method are as follows:

[0071](1) Preparation of oxide-type ceramic nanoparticles: 0.0078mol C 6 h 8 o 7 ·H 2 O, 0.007mol LiOH, 0.003mol La(NO 3 ) 3 ·6H 2 O, 0.00175mol ZrO(NO 3 ) 2 ·xH 2 O, 0.00025mol NbCl 5 Dissolve in 10 ml of deionized water under stirring and heating to obtain a homogeneous solution. After drying the sol at 250 °C for 3 h, a brown porous gel was obtained. calcining the dried gel in a muffle furnace at 850° C. for 2 hours in air to obtain oxide-type ceramic nanoparticles;

[0072] (2) Preparation of oxide-type ceramic composite nanofibers: Dissolve 0.8g polyvinylidene fluoride in 9.2g N,N-dimethylformamide solvent and stir at 60°C for 24h to obtain 8wt.% uniform polyvinylidene difluoride Vinyl fluoride solution; disperse 0.4g of ceramic nanoparticles in polyvinylidene fluoride solution, add 0.04g of polyethylen...

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Abstract

The invention relates to a preparation method of an energy storage system device material, in particular to an oxide type ceramic composite nanofiber solid electrolyte and an electrostatic spinning preparation method thereof, and belongs to the technical field of energy storage system device material preparation. The preparation method comprises the following steps: firstly, preparing oxide type ceramic nanoparticles; then, dispersing the oxide type ceramic nanoparticles into a polyvinylidene fluoride solution to prepare a spinning precursor solution, and performing electrostatic spinning to obtain oxide type ceramic nanofibers; and finally, pouring the polymer electrolyte of a polymer conductive lithium salt system to obtain the oxide type ceramic composite nanofiber solid electrolyte. The material can be applied to a flexible solid-state lithium battery and has good electrochemical performance and mechanical flexibility.

Description

technical field [0001] The invention relates to a method for preparing an energy storage system device material, in particular to a preparation method using an oxide-type ceramic composite nanofiber solid electrolyte and an electrospinning method thereof, and belongs to the technical field of energy storage system device material preparation. Background technique [0002] The rapid development of wearable electronic products, electric vehicles and smart grids requires energy storage devices with high energy density, high safety, and good mechanical flexibility to match them. After decades of development, lithium-ion batteries have become the mainstream energy storage devices for today's electronic products. However, conventional commercial lithium-ion batteries use graphite as the negative electrode, which is only 372mAh g -1 Theoretical capacity, there is a major defect of low energy density. In addition, the organic liquid electrolyte used in the battery is flammable and...

Claims

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Application Information

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IPC IPC(8): D01F6/48D01F1/10H01M10/0525H01M10/0562D01D5/00D04H1/4382D04H1/728
CPCD01F6/48D01F1/10H01M10/0562H01M10/0525D04H1/4382D04H1/728D01D5/0092D01D5/003Y02E60/10
Inventor 胡毅张萌萌潘鹏
Owner ZHEJIANG SCI-TECH UNIV
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