Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polymer composite solid electrolyte, preparation method thereof and lithium ion battery

A solid electrolyte and polymer technology, applied in solid electrolytes, electrolytes, non-aqueous electrolytes, etc., can solve the problems of complex preparation methods of composite solid electrolytes, inability to fully utilize inorganic electrolytes, etc., to inhibit the growth of lithium dendrites and achieve high mechanical Strength, the effect of improving safety performance

Pending Publication Date: 2021-03-16
YINLONG ENERGY CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a polymer composite solid electrolyte, its preparation method and lithium ion battery, to solve the problems in the prior art that the composite solid electrolyte preparation method is complex and cannot fully play the role of the inorganic electrolyte

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
  • Polymer composite solid electrolyte, preparation method thereof and lithium ion battery
  • Polymer composite solid electrolyte, preparation method thereof and lithium ion battery
  • Polymer composite solid electrolyte, preparation method thereof and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] In another typical embodiment of the present application, a method for preparing any one of the above-mentioned polymer composite solid electrolytes is provided, the preparation method comprising: step S1, preparing a dispersion liquid in which polymers and lithium salts are dispersed; Step S2, disposing the dispersion liquid on the surface of the inorganic solid electrolyte layer, and removing the solvent in the dispersion liquid to obtain a polymer composite solid electrolyte.

[0035] The above preparation method does not require complex mixing process and molding means, is simple to operate and easy to implement, and is beneficial to industrial popularization and application.

[0036] In one embodiment, in order to improve the uniformity of dispersion of the polymer and the lithium salt, the above-mentioned step S1 preferably includes: step S11, dispersing the polymer in a solvent to form a polymer solution; step S12, dissolving the lithium salt in the polymer A dis...

Embodiment 1

[0048] Mix 1g of polyurethane (TPU1190 from Yantai Wanhua) with 5.67g of N,N-dimethylformamide (DMF), heat to 60°C, and stir at 800rpm for 60min to fully dissolve to obtain a polyurethane solution. Subsequently, the above polyurethane solution was transferred to a glove box, maintained at 60°C, and 0.6 g of bistrifluoromethanesulfonimide lithium salt was added, and stirred at a speed of 800 rpm for 60 min to achieve full dissolution to obtain a dispersion. The dispersion liquid was uniformly drop-coated on one side of the prepared LLZTO sheet with a thickness of about 200 μm, and vacuum-dried (60°C, -0.1MPa) to obtain a polymer composite solid electrolyte sheet LLZTO-PU.

Embodiment 2

[0050] 1 g of polyurethane was mixed with 5.67 g of N,N-dimethylformamide (DMF), heated to 60° C., and stirred at a speed of 800 rpm for 60 min to fully dissolve to obtain a polyurethane solution. Subsequently, the above polyurethane solution was transferred to a glove box, maintained at 60°C, and 1 g of bistrifluoromethanesulfonimide lithium salt was added, and stirred at a speed of 1000 rpm for 80 min to achieve full dissolution to obtain a dispersion. The dispersion liquid was uniformly drop-coated on one side of the prepared LLZTO sheet with a thickness of about 200 μm, and vacuum-dried (60°C, -0.1MPa) to obtain a polymer composite solid electrolyte sheet LLZTO-PU.

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a polymer composite solid electrolyte, a preparation method thereof and a lithium ion battery. The polymer composite solid electrolyte comprises: a sheet-like inorganic solid electrolyte layer, and polymer layer; a lithium salt is dispersed in the polymer layer, and the polymer layer is attached to the surface of one side of the inorganic solid electrolyte layer. The polymerlayer is arranged on the inorganic solid electrolyte layer, so that the polymer layer and the inorganic solid electrolyte layer do not need complex mixing process and forming means. The two-layer composite structure is still mainly composed of an inorganic solid electrolyte layer, so that the inherent characteristics of high ionic conductivity and high mechanical strength of the solid electrolytecan be ensured; and the polymer layer is arranged on the surface of one side of the inorganic solid electrolyte layer, so that the wettability of the solid electrolyte is improved, the interface resistance of the solid electrolyte and the lithium metal negative electrode is weakened, and the effect of the inorganic solid electrolyte layer is fully exerted. In addition, the polymer electrolyte isin good contact with the lithium negative electrode, and the high mechanical strength of the inorganic solid electrolyte can effectively inhibit the growth of local lithium dendrites.

Description

technical field [0001] The invention relates to the technical field of solid lithium batteries, in particular to a polymer composite solid electrolyte, a preparation method thereof and a lithium ion battery. Background technique [0002] Solid-state lithium batteries (Solid-state lithium batteries SSLBs) have higher energy density, longer cycle life and better safety than traditional ion batteries. Garnet Li 7 La 3 Zr 2 o 12 (LLZTO) is a solid-state electrolyte and lithium metal anode is considered to be an ideal choice for next-generation high-energy, high-power-density batteries. On the one hand, among various inorganic solid-state electrolytes, garnet LLZTO has a high lithium-ion conductivity (nearly 10 –3 S cm –1 ), wide electrochemical stability voltage window (~6V), and excellent stability to lithium metal anodes make it a promising electrolyte for lithium metal batteries. On the other hand, lithium metal has a higher theoretical capacity (3860mA h g –1 ), the ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/0525
CPCH01M10/0525H01M10/056H01M2300/0065H01M2300/0094Y02E60/10
Inventor 赵雪玲孙克宁孙旺方丽蔡惠群
Owner YINLONG ENERGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com