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

Solid-state electrolyte and solid-state battery comprising same

A solid electrolyte, ionic conductivity technology, applied in the direction of electrolyte immobilization/gelation, secondary batteries, circuits, etc., can solve the problems of volume expansion of positive and negative materials, poor interface compatibility, easy interface separation, etc. The effect of increasing crosslinking density, strong mechanical strength and avoiding material damage

Active Publication Date: 2021-12-31
ZHUHAI COSMX BATTERY CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the solid electrolyte can also solve the problems of high interfacial impedance with electrodes, poor interfacial compatibility, and easy separation of the interface caused by the volume expansion and contraction of positive and negative electrode materials during charging and discharging.

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
  • Solid-state electrolyte and solid-state battery comprising same
  • Solid-state electrolyte and solid-state battery comprising same
  • Solid-state electrolyte and solid-state battery comprising same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0068]

[0069] The present invention also provides a method for preparing a solid electrolyte, comprising the following steps:

[0070] S1: Diisocyanate and alcohol compound are polymerized to obtain a polymer;

[0071] S2: The polymer is subjected to lithiation treatment to obtain a lithiation-treated polymer.

[0072] According to the present invention, the method further comprises the steps of:

[0073] S3: adding an ion conductor to obtain the solid electrolyte.

[0074] According to the present invention, the step S1 specifically includes the following steps:

[0075] S1-1: Dissolve the diisocyanate in an organic solvent and stir for a certain period of time under an argon atmosphere;

[0076] S1-2: Add the alcohol compound and the catalyst to the above solution, and stir at a certain temperature (such as 70-90°C) for a certain period of time (such as 12-48h);

[0077] S1-3: Add alcohol solvent to the above solution, stir for a certain period of time (such as 1-5 h...

Embodiment 1

[0105] (a) Preparation of solid electrolyte

[0106] (1) 1.5g of isophorone diisocyanate (IPDI) was dissolved in 100ml of anhydrous DMF, and stirred for a certain period of time under an argon atmosphere;

[0107] (2) Add 1.6g of pentylene glycol and a drop of dibutyltin dilaurate (DBTDL) to the above solution, and stir at 80°C for 24h.

[0108] (3) Add 3ml of methanol to the above solution, stir for 1h, and remove excess isocyanate groups.

[0109] (4) Add 3 g of lithium hydride to the above solution, and stir at 80° C. for more than 24 hours to carry out lithiation reaction.

[0110] (5) Add 0.3g lithium salt and 0.2g LLZTO powder to the above solution to improve the ionic conductivity of the solid electrolyte.

[0111] (6) Introduce the product into a polytetrafluoroethylene mold, place it in a blast oven and dry it at 90°C for 48 hours, then put it in a vacuum oven and dry it at 70°C for 24 hours to remove the residual solvent to obtain a solid electrolyte. The thickness...

Embodiment 2

[0120] Other operations are the same as in Example 1, the difference is that the preparation process of the solid electrolyte is different:

[0121] (1) Dissolve 1.5g of xylene diisocyanate (MPI) in 100ml of anhydrous DMF, and stir for a certain period of time under an argon atmosphere;

[0122] (2) Add 1.6g of pentylene glycol and a drop of dibutyltin dilaurate (DBTDL) to the above solution, and stir at 80°C for 24h.

[0123] (3) Add 3ml of methanol to the above solution, stir for 1h, and remove excess isocyanate groups.

[0124] (4) Add 3 g of lithium hydride to the above solution, and stir at 80° C. for more than 24 hours to carry out lithiation reaction.

[0125] (5) Add 0.3g lithium salt and 0.2g LLZTO powder to the above solution to improve the ionic conductivity of the solid electrolyte.

[0126] (6) The product was introduced into a polytetrafluoroethylene mold, placed in a blast oven to dry at 90°C for 48 hours, and then placed in a vacuum oven to dry at 70°C for 24...

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
Ionic conductivityaaaaaaaaaa
Glass transition temperatureaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a solid-state electrolyte and a solid-state battery comprising the same. The solid-state electrolyte comprises a lithiated polymer, and the lithiated polymer is a polymer obtained by further lithiating a polymer of diisocyanate and an alcohol compound. The solid-state electrolyte has a self-healing function, can reduce performance loss caused by damage to the greatest extent, and fundamentally realizes the characteristics of high safety, high reliability and long service life. In addition, the solid-state electrolyte can also solve the problems that the interface impedance between the solid electrolyte and the electrode is large, the interface compatibility is poor, and the interface is easy to separate due to volume expansion and shrinkage of positive and negative electrode materials in the charging and discharging process.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage batteries, in particular to a solid electrolyte, a preparation method thereof and a solid battery comprising the solid electrolyte. Background technique [0002] Lithium battery is one of the fastest growing batteries at present. However, with the increasing market demand for lithium batteries, the safety of lithium batteries has become increasingly prominent. Many spontaneous combustion accidents in mobile phones and cars are caused by a short circuit inside the battery that generates a lot of heat, causing the internal electrolyte to decompose. The technology of using solid electrolyte instead of organic electrolyte is expected to fundamentally solve the above problems. [0003] Solid electrolytes include inorganic solid electrolytes and organic polymer solid electrolytes. Although the use of solid electrolytes inhibits dendrite growth to a certain extent and solves 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
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0085Y02E60/10
Inventor 董德锐赵伟张赵帅唐伟超李素丽
Owner ZHUHAI COSMX BATTERY 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