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

Sulfide composite solid electrolyte prepared by dry method and preparation method thereof

A technology of sulfide electrolyte and solid electrolyte, which is applied in the direction of solid electrolyte, non-aqueous electrolyte, circuit, etc., and can solve the problems affecting the ionic conductivity of sulfide electrolyte sheets, etc.

Active Publication Date: 2021-06-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
View PDF12 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain a sufficiently thin and flexible electrolyte sheet, it is necessary to add a higher content of polymer, and generally need to be dissolved and dispersed with a solvent, which will affect the ionic conductivity of the sulfide electrolyte sheet

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The invention provides a preparation method of a sulfide composite solid electrolyte, comprising: a) freeze-grinding a polymer to obtain a polymer powder; b) mixing the polymer powder with a sulfide electrolyte powder, then performing shear kneading, The sulfide composite solid electrolyte is obtained through static pressure processing of a flat plate, and then densified under pressure.

[0029] The present invention has no special limitation on the sources of all raw materials, which can be commercially available or self-made.

[0030] In the present invention, the polymer is preferably styrene-ethylene-butylene-styrene copolymer, butadiene-styrene copolymer, polyvinylidene fluoride, polysulfone, polyethersulfone, polymethyl sulfone Acrylic-based, polyacrylonitrile-based, cellulose, polytetrafluoroethylene, polystyrene-based, polycarbonate-based, polyvinyl chloride-based, polyamide-based, polyimide-based, polyurethane-based, ethylene-vinyl acetate One or more of copol...

Embodiment 1

[0051] Styrene-ethylene-butylene-styrene copolymer (25 wt% styrene content) was ground into a powder with an average particle size of 55 μm in liquid nitrogen by a freeze grinder, and then 0.5 parts by mass of styrene-ethylene- Butylene-styrene copolymer powder and 99.5 parts by mass of sulfide electrolyte Li with an average particle size of 25 μm 10 sn 0.7 Si 0.3 P 2 S 12 The powder is uniformly mixed by mechanical stirring; the obtained electrolyte mixture is sheared and kneaded at 100°C by an internal mixer, and then the sheared and kneaded electrolyte mixture is processed into a sheet at 110°C by flat plate static pressure (50MPa, 10min) ; the resulting electrolyte sheet was densified by roll pressing to obtain a 146 μm monolayer Li 10 sn 0.7 Si 0.3 P 2 S 12 Composite solid electrolyte sheet.

[0052] At room temperature, for the prepared Li 10 sn 0.7 Si 0.3 P 2 S 12 The composite solid electrolyte sheet was tested by electrochemical impedance spectroscopy, u...

Embodiment 2

[0054] Grind polyimide (the tensile strength of pure polyimide is 110 MPa) in dry ice into a powder with an average particle size of 5 μm by a freeze grinder, then mix 10 parts by mass of polyimide powder with 90 parts by mass The sulfide electrolyte Li with an average particle size of 5 μm 3 P.S. 4 The powder is mixed evenly by hand grinding; the obtained electrolyte mixture is sheared and kneaded at 160°C by a kneader, and then the sheared and kneaded electrolyte mixture is processed into a sheet shape at 260°C by flat plate static pressure (500MPa, 50min); The resulting electrolyte sheet was densified by isostatic pressing to obtain a 10 μm monolayer Li 3 P.S. 4 Composite solid electrolyte sheet.

[0055] At room temperature, for the prepared Li 3 P.S. 4 The composite solid electrolyte sheet was tested by electrochemical impedance spectroscopy, using stainless steel as the electrode, and the obtained results were: lithium ion conductivity 9.7×10 -4 S / cm.

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
Conductivity at room temperatureaaaaaaaaaa
Conductivity at room temperatureaaaaaaaaaa
Login to View More

Abstract

The invention provides sulfide composite solid electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: a) freezing and grinding a polymer to obtain polymer powder; b) mixing the polymer powder with sulfide electrolyte powder, carrying out shearing and kneading, carrying out flat plate static pressure processing molding, and carrying out pressurization densification to obtain the sulfide composite solid electrolyte. Compared with the prior art, the sulfide composite solid electrolyte disclosed by the invention has the advantages that by utilizing the characteristics that the sulfide electrolyte has good plasticity and the polymer is easy to fibrosis under the action of shearing force, an interpenetrating network structure is formed in the sulfide composite solid electrolyte; therefore, the sulfide composite solid electrolyte has relatively good flexibility and relatively high ionic conductivity; moreover, only a small amount of polymer is needed, no solvent needs to be added, the influence of excessive polymer and solvent on the performance of the sulfide electrolyte is eliminated, the preparation method is simple, environment-friendly and efficient, and the defects that the sulfide electrolyte in a traditional solid-state battery is thick and liable to crack are overcome.

Description

technical field [0001] The invention belongs to the technical field of all-solid-state energy storage, and in particular relates to a sulfide composite solid electrolyte prepared by a dry method and a preparation method thereof. Background technique [0002] In order to cope with the depletion of traditional energy and the environmental problems caused by it, clean energy such as wind energy and solar energy has gradually become the main direction of the energy field. When applying these clean energy sources, energy storage devices with low cost, high energy density and high safety performance are required. As an important part of the energy system, energy storage technology matches the capacity of the unit, which can reduce the impact of the random and intermittent working process of the unit on the power grid, support the rapid adjustment of charging and discharging, and ensure the safety and stability of the system. At present, lithium-ion batteries have significant comp...

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): H01M10/0562
CPCH01M10/0562H01M2300/0068Y02E60/10
Inventor 姚霞银徐芳林
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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