Composite electrolyte film, preparation method thereof and application of composite electrolyte film in solid-state lithium battery

A technology of composite electrolyte and gel electrolyte, which is applied in the field of composite electrolyte film and its preparation, can solve the problems of poor chemical properties and mechanical properties, and achieve the effects of ensuring uniform dispersion, increasing interface contact area, and improving structural uniformity

Pending Publication Date: 2022-05-13
HARBIN INST OF TECH
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem of poor electrochemical and mechanical properties of polymer electrolytes in existing

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite electrolyte film, preparation method thereof and application of composite electrolyte film in solid-state lithium battery
  • Composite electrolyte film, preparation method thereof and application of composite electrolyte film in solid-state lithium battery
  • Composite electrolyte film, preparation method thereof and application of composite electrolyte film in solid-state lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Embodiment 1: The preparation method of the composite electrolyte film of this embodiment is carried out according to the following steps:

[0058] 1. Preparation of surface treatment agent-coated lithium ion conductor filler: Mix 45mL of absolute ethanol, 2.5mL of deionized water and 1.25mL of glacial acetic acid evenly, stir for 3h to stabilize the pH value, and then add 5mL of surface treatment agent 3-aminopropane 1 g of lithium ion conductive filler aluminum doped with lithium titanium phosphate (Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , LATP) was dispersed in the mixed solution, and stirred for 10 h at a temperature of 60 °C to obtain a dispersion; the dispersion was centrifuged and washed in turn, and repeated three times; Vacuum drying at ℃ for 12 h to obtain polysiloxane-coated aluminum-doped lithium titanium phosphate particles;

[0059] 2. Preparation of electrospinning solution: 3.69g of polyvinylidene fluoride was dissolved in 13.3g of N,N-dimethylformamide, an...

Example Embodiment

[0102] Embodiment 2: The preparation method of the composite electrolyte film of this embodiment is carried out according to the following steps:

[0103] 1. Preparation of surface treatment agent-coated lithium ion conductor filler: Mix 45mL of absolute ethanol, 2.5mL of deionized water and 1.25mL of glacial acetic acid evenly, stir for 3h to stabilize the pH value; add 5mL of surface treatment agent 3-aminopropyl Triethoxysilane, continue to stir for 5h; 1g of lithium ion conductor type filler aluminum is doped with lithium titanium phosphate (Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , LATP) was dispersed in the above solution, heated and stirred at 60 °C for 10 h to form a dispersion; the obtained dispersion was centrifuged and washed successively, and repeated three times; the upper solvent after the third centrifugation was sucked out, and the remaining solid phase at the bottom was taken out. , after vacuum drying at 60 °C for 12 h, polysiloxane-coated aluminum-doped lithium t...

Example Embodiment

[0110] Embodiment 3: The preparation method of the composite electrolyte film of this embodiment is carried out according to the following steps:

[0111] 1. Preparation of surface treatment agent-coated lithium ion conductor filler: Mix 45mL of absolute ethanol, 2.5mL of deionized water and 1.25mL of glacial acetic acid evenly, stir for 3h to stabilize the pH value; then add 5mL of surface treatment agent 3-aminopropane base triethoxysilane, continue to stir for 5h; 1g of lithium ion conductive filler aluminum is doped with lithium titanium phosphate (Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , LATP) was dispersed in the above solution, heated and stirred at 60°C for 10 hours to form a dispersion; the obtained dispersion was centrifuged and washed in turn, and repeated three times; the upper solvent after the third centrifugation was sucked out, and the remaining solid phase at the bottom was taken out. After vacuum drying at 60 °C for 12 h, polysiloxane-coated aluminum-doped lithiu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a composite electrolyte film, a preparation method thereof and application of the composite electrolyte film in a solid-state lithium battery, and relates to an electrolyte film and a preparation method and application thereof. The invention aims to solve the technical problems of poor electrochemical performance and mechanical performance of the polymer electrolyte in the existing solid-state lithium battery. The composite electrolyte film is composed of a porous polymer fiber diaphragm and a filled gel electrolyte. The preparation method comprises the following steps: coating the lithium ion conductor type filler with the surface treating agent, mixing with the polymer to form an electrostatic spinning solution, and spinning to obtain the porous polymer fiber diaphragm; and blade-coating the porous fiber diaphragm with a gel electrolyte precursor solution formed by mixing a lithium salt, a polymer monomer, a plasticizer and an initiator, and heating and curing to obtain the composite electrolyte film. And assembling the positive electrode, the composite electrolyte film and the metal lithium negative electrode in a battery shell, and heating and curing to obtain the solid-state lithium battery. The capacity retention ratio of the battery after 200 cycles at 0.5 C at room temperature is 86.4-99.9%, and the battery can be used in the field of lithium batteries.

Description

technical field [0001] The invention belongs to the field of solid-state lithium batteries, and in particular relates to a composite electrolyte film and its preparation method and application. Background technique [0002] As the core component of solid-state lithium batteries, solid-state electrolytes are critical to improving the performance of lithium-ion batteries by properly designing the composition and structure of solid-state electrolytes. Polymer electrolytes have attracted extensive attention in the field of flexible electronic devices because of their strong flexibility, good interface adhesion with electrodes, and adaptability to roll-to-roll production processes. However, the low room temperature ionic conductivity, poor mechanical strength and electrochemical stability of polymer electrolytes still limit their practical applications. In addition, the lithium ion migration number of polymer electrolytes is usually low, and the resulting concentration polarizat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M10/0565H01M50/411H01M10/0525
CPCH01M10/0565H01M50/411H01M10/0525H01M2300/0082Y02E60/10
Inventor 熊岳平金英敏宗鑫张雪柏贾政刚
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap