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

Application of integrated structure in solid-state lithium ion battery

A lithium-ion battery and solid-state electrolyte technology, which is applied in the manufacture of secondary batteries, non-aqueous electrolyte batteries, and electrolyte batteries, can solve the problems of poor interface performance and low conductivity of all-solid-state lithium-ion batteries, and achieve industrial applications. The preparation process is simple and the effect of good charge and discharge performance

Inactive Publication Date: 2019-04-23
SOUTH CHINA UNIV OF TECH
View PDF8 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of poor interface performance and low conductivity of existing all-solid-state lithium-ion batteries, and provides an application of an integrated structure in solid-state lithium-ion batteries

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
  • Application of integrated structure in solid-state lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Take 2g of lithium iron phosphate electrode material, 0.25g of acetylene black, 0.25g of polyvinylidene fluoride in 12ml of N-methylpyrrolidone 300r / min ball mill for 24h, mix evenly and coat on aluminum foil. Vacuum-dried at 80°C for 12 hours to obtain a positive electrode sheet.

[0028] (2) Take 2g of polyacrylonitrile powder, 0.05g of lithium perchlorate, and 0.1g of aluminum oxide particles and add them to 20ml of dimethylformamide and stir for 20 hours to obtain a uniform mixed solution, and then pour it into a polytetrafluoroethylene mold , vacuum drying at 25 °C for 12 h to obtain a composite solid electrolyte.

[0029] (3) Put the composite solid electrolyte on the positive electrode sheet, and heat press at 30° C. for 6 hours with a hot press to obtain an integrated positive electrode solid electrolyte structure.

[0030] (4) Assemble the all-solid-state lithium-ion battery in the following form: positive electrode case-spring leaf-stainless steel gasket-...

Embodiment 2

[0033] (1) Take 1g of lithium cobalt oxide electrode material, 0.9g of carbon nanotubes, 0.6g of polyvinylidene fluoride in 10ml of N-methylpyrrolidone 300r / min ball mill for 24h, mix them evenly and coat them on aluminum foil. Vacuum-dried at 80°C for 12 hours to obtain a positive electrode sheet.

[0034] (2) Take 2g of polyacrylonitrile powder, 0.06g of lithium perchlorate, and 0.8g of aluminum oxide particles and add them to 20ml of dimethylformamide and stir for 20 hours to obtain a uniform mixed solution, and then pour it into a polytetrafluoroethylene mold , vacuum drying at 40 °C for 42 h to obtain a composite solid electrolyte.

[0035] (3) Put the composite solid electrolyte on top of the positive electrode sheet, and press it with a hot press at 90°C for 15 hours to obtain an integrated structure of the positive electrode solid electrolyte

[0036] (4) Assemble the all-solid-state lithium-ion battery in the following form: positive electrode case-spring leaf-stainl...

Embodiment 3

[0039] (1) Take 1.5g of nickel-cobalt lithium manganate electrode material, 0.7g of graphene, 0.3g of polyvinylidene fluoride in 10ml of N-methylpyrrolidone 300r / min ball mill for 24h, mix evenly and coat on aluminum foil. Vacuum-dried at 80°C for 12 hours to obtain a positive electrode sheet.

[0040] (2) Take 2g of polyacrylonitrile powder, 0.1g of lithium perchlorate, and 0.4g of aluminum oxide particles and add them to 20ml of dimethylformamide and stir for 20 hours to obtain a uniform mixed solution, and then pour it into a polytetrafluoroethylene mold , vacuum drying at 40 °C for 42 h to obtain a composite solid electrolyte.

[0041] (3) Put the composite solid electrolyte on top of the positive electrode sheet, and use a hot press at 90°C for 24 hours to obtain an integrated positive electrode solid electrolyte structure

[0042] (4) Assemble the all-solid-state lithium-ion battery in the following form: positive electrode case-spring leaf-stainless steel gasket-positi...

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

No PUM Login to View More

Abstract

The invention discloses an application of an integrated structure in a solid-state lithium ion battery, and belongs to the technical field of solid-state lithium ion batteries. The preparation methodcomprises the following steps: (1) uniformly coating an aluminum foil with a positive active material, a conductive agent, a binder and a solvent in a ball milling and mixing manner to obtain a positive plate; (2) uniformly stirring and mixing a polymer, inorganic particles, lithium salt and a solvent, and obtaining a composite solid electrolyte through a solution casting method; (3) putting the composite solid electrolyte obtained in the step (2) on the positive plate obtained in the step (1), and carrying out hot pressing by using a hot press to obtain a positive solid electrolyte integratedstructure; and (4) assembling the negative electrode into the all-solid-state lithium ion battery by using a metal lithium sheet. The all-solid-state lithium ion battery prepared by the method disclosed by the invention is small in interface impedance and excellent in cycle performance.

Description

technical field [0001] The invention relates to the technical field of solid-state lithium-ion batteries, in particular to the application of an integrated structure in solid-state lithium-ion batteries. Background technique [0002] Lithium-ion batteries have been widely used in various portable electronic products, electric energy storage equipment and other fields since the commercialization of lithium-ion batteries in 1990 due to their advantages such as high energy density, high output power, and long cycle life. However, traditional lithium-ion batteries mostly use leaky, volatile, and explosive organic electrolytes, which greatly reduces the safety performance of lithium-ion batteries. All-solid-state lithium-ion batteries can fundamentally solve battery safety problems because they do not contain liquid organic solvents. [0003] Inorganic solid electrolytes have high ionic conductivity, but have very poor contact with the positive and negative interfaces. Polymer ...

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): H01M10/058H01M10/0525
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 王海辉韩庆月王素清陈国平胡欣超
Owner SOUTH CHINA UNIV OF TECH
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