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

Lithium battery high-grain-boundary-conductivity perovskite solid electrolyte and preparation method thereof

A solid-state electrolyte and lithium battery technology, applied in the manufacture of electrolyte batteries, electrolytes, non-aqueous electrolyte batteries, etc., can solve the problems of poor composition accuracy, low grain boundary conductivity, complex synthesis process, etc. The effect of low temperature and simple process

Inactive Publication Date: 2019-12-27
CHENDU NEW KELI CHEM SCI CO LTD
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Existing perovskite Li 3x La 2 / 3-x TiO 3 Due to defects such as low grain boundary conductivity, poor compositional accuracy, and complex synthesis process, the present invention proposes a high grain boundary conductance perovskite solid electrolyte for lithium batteries and a preparation method thereof

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
  • Lithium battery high-grain-boundary-conductivity perovskite solid electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing a perovskite solid electrolyte with high grain boundary conductance for a lithium battery, comprising the following steps:

[0030] S1, according to stoichiometric ratio Li 3x La 2 / 3-x TiO 3 Weigh LiNO 3 , La(NO 3 ) 3 , ethyl titanate (x=0.1), with LiNO 3 , La(NO 3 ) 3 , Ethyl titanate as raw material, added to the solvent, then add an appropriate amount of LiF, zirconate and lithium silicate, add auxiliary agents, to obtain a mixture; the solvent is deionized water; the zirconate is CaZrO 3 ; The auxiliary agent is LiNO 3 ; The La(NO 3 ) 3 , LiF, zirconate, lithium silicate, the mass ratio of auxiliary agent is 50:6:7:5:4;

[0031] S2. Put the mixed substance obtained in step S1 in an airtight container, stir and dissolve it under high temperature and high pressure conditions, conduct a preliminary reaction in a non-solid state, and then dry it at a temperature of 80°C, grind it, and press it into tablets to obtain Precursor sheet of ...

Embodiment 2

[0034] A method for preparing a perovskite solid electrolyte with high grain boundary conductance for a lithium battery, comprising the following steps:

[0035] S1, according to stoichiometric ratio Li 3x La 2 / 3-x TiO 3 Weigh LiNO 3 , La(NO 3 ) 3 , ethyl titanate (x=0.1), with LiNO 3 , La(NO 3 ) 3 , ethyl titanate as raw materials, added to the solvent, and then add an appropriate amount of LiF, zirconate and lithium silicate, add auxiliary agents to obtain a mixture; the solvent is absolute ethanol; the zirconate is Na 2 ZrO 3 ; The auxiliary agent is Li 2 CO 3 ; The La(NO 3 ) 3 , LiF, zirconate, silicate, the mass ratio of auxiliary agent is 60:7:6:6:4;

[0036] S2. Put the mixed substance obtained in step S1 in an airtight container, stir and dissolve it under high temperature and high pressure conditions, conduct a preliminary reaction in a non-solid state, and then dry it at a temperature of 90°C, grind it, and press it into tablets to obtain The thickness ...

Embodiment 3

[0039] A method for preparing a perovskite solid electrolyte with high grain boundary conductance for a lithium battery, comprising the following steps:

[0040] S1, according to stoichiometric ratio Li 3x La 2 / 3-x TiO 3 Weigh LiNO 3 , La(NO 3 ) 3 , ethyl titanate (x=0.12), with LiNO 3 , La(NO 3 ) 3 , ethyl titanate as raw materials, added to the solvent, and then add an appropriate amount of LiF, zirconate and lithium silicate, add auxiliary agents to obtain a mixture; the solvent is deionized water; the zirconate is Li 2 ZrO 3 ; The auxiliary agent is LiOH; The La(NO 3 ) 3 , LiF, zirconate, silicate, the mass ratio of auxiliary agent is 70:7:6:5:5;

[0041] S2. Put the mixed substance obtained in step S1 in an airtight container, stir and dissolve it under high temperature and high pressure conditions, carry out a preliminary reaction in a non-solid state, and then dry it at a temperature of 100°C, grind it, and press it into tablets to obtain The thickness of th...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of lithium battery preparation and relates to a lithium battery high-grain-boundary-conductivity perovskite solid electrolyte and a preparation method thereof. According to the lithium battery high-grain-boundary-conductivity perovskite solid electrolyte and the preparation method thereof, F<-> and Zr<4+> are introduced in a preparation process; the F<-> is used for replacing part of O<2->, so that distances between titanium atoms and oxygen atoms in a perovskite structure Li3xLa2 / 3-xTiO3 are shortened, and Ti-O bonds are enhanced, and therefore Li-O bonds are reduced, and the ionic conductivity of a whole system is improved; the Zr<4+> is adopted to replace part of Ti<4+>, so that the perovskite structure is more stable; after calcinations is performed, slow cooling is carried out firstly, and then shock cooling is carried out, so that part of amorphous lithium silicate is generated in the grain boundary of the perovskite type electrolyte,and therefore, grain boundary barriers can be lowered, and grain boundary conductivity is improved. With the lithium battery high-grain-boundary-conductivity perovskite solid electrolyte and the preparation method thereof of the invention adopted, problems such as the low grain boundary conductivity, poor component accuracy and complex synthesis process of a perovskite type Li3xLa2 / 3-xTiO3 are solved.

Description

technical field [0001] The invention belongs to the technical field of preparation of lithium batteries, and in particular relates to a perovskite solid electrolyte with high grain boundary conductance for lithium batteries and a preparation method thereof. Background technique [0002] In recent years, lithium-ion batteries have broad application prospects in the fields of energy storage batteries and vehicle power batteries due to their high energy, strong discharge capacity, no memory effect, and high energy storage efficiency. At present, lithium-ion batteries generally use liquid electrolytes, but liquid electrolyte lithium batteries contain flammable liquid organic substances, which pose safety hazards such as fire and explosion. Compared with liquid electrolytes, solid electrolytes are non-volatile and generally non-flammable. Therefore, using solid electrolytes instead of liquid electrolytes in lithium batteries can fundamentally solve the safety problem of lithium b...

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): H01M10/0562H01M10/058H01M10/0525
CPCH01M10/0525H01M10/0562H01M10/058H01M2300/0071Y02E60/10Y02P70/50
Inventor 陈庆李国松曾军堂
Owner CHENDU NEW KELI CHEM SCI 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