Check patentability & draft patents in minutes with Patsnap Eureka AI!

Electrochemical device, preparation method thereof and electronic device

An electrochemical and compound technology, applied in the field of electronics, to achieve the effect of improving cycle performance

Active Publication Date: 2021-04-20
NINGDE AMPEREX TECH
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although various methods currently exist to improve the cycle performance of electrochemical devices, not all aspects are completely satisfactory, and further improvements in this area are expected

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
  • Electrochemical device, preparation method thereof and electronic device
  • Electrochemical device, preparation method thereof and electronic device
  • Electrochemical device, preparation method thereof and electronic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Preparation of the negative electrode sheet: the current collector adopts copper foil with a thickness of 8 μm; the negative active material adopts SiO (20wt%, mass percentage, the same below) and graphite (80wt%), the conductive agent adopts conductive carbon black, and the binder adopts polycarbonate. Acrylic acid and sodium carboxymethyl cellulose; mix the negative electrode active material, conductive carbon black, polyacrylic acid and sodium carboxymethyl cellulose in a weight ratio of 92:2:5:1, disperse them in deionized water to form a slurry, and stir evenly Afterwards, be coated on copper foil, dry, form negative electrode active material layer, the coating weight of negative electrode active material layer is 5.9mg / cm 2 , after drying and cold pressing (the compacted density is 1.5g / cm 3 ), to obtain the negative electrode sheet. The negative electrode sheet is rolled and composited with lithium metal for pre-lithiation.

[0054] Preparation of the positive ...

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
Login to View More

Abstract

The embodiment of the invention provides an electrochemical device, a preparation method thereof and an electronic device. The electrochemical device includes: a positive electrode sheet including a positive electrode active material layer, a negative pole piece comprising a negative active material layer, and an isolating membrane arranged between the positive pole piece and the negative pole piece. The mass ratio of the fluorine element to the nitrogen element in the surface layer of the positive electrode active material layer is a, the mass ratio of the fluorine element to the nitrogen element in the surface layer of the negative electrode active material layer is b, a is greater than or equal to 3 and less than or equal to 50, and b is greater than or equal to 30 and less than or equal to 300. By controlling the mass ratio of the fluorine element to the nitrogen element on the surface layers of the positive electrode active material layer and the negative electrode active material layer, a stable negative electrode solid electrolyte phase interface film (SEI) is formed on the surface of the negative electrode, and a stable positive electrode solid electrolyte phase interface film (CEI) is formed on the surface of the positive electrode, so that the cycle performance of the electrochemical device is improved.

Description

technical field [0001] The present application relates to the field of electronic technology, in particular to an electrochemical device, a preparation method thereof, and an electronic device. Background technique [0002] In recent years, with the rapid development of electronic products and electric vehicles, the requirements for the cycle performance of electrochemical devices (eg, lithium-ion batteries) are also increasing. Although various methods currently exist to improve the cycle performance of electrochemical devices, not all aspects are completely satisfactory, and further improvements in this regard are expected. SUMMARY OF THE INVENTION [0003] An embodiment of the present application provides an electrochemical device, comprising: a positive electrode sheet, the positive electrode sheet includes a positive active material layer; a negative electrode sheet, the negative electrode sheet includes a negative active material layer; a separator, the separator is ...

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): H01M10/0525H01M4/13H01M10/0567H01M10/058
CPCH01M10/0525H01M10/0567H01M2300/0025H01M4/134H01M4/131H01M4/386H01M4/525H01M4/505H01M2004/021
Inventor 蒋晨曦张亚菲余红明陶兴华
Owner NINGDE AMPEREX TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com