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

Electrochemical device and electronic device

An electrochemical and electrolyte technology, applied in the field of energy storage, can solve the irreversible reduction reaction of lithium ions, reduce the charge-discharge cycle efficiency of lithium-ion batteries, affect the high-temperature cycle and expansion performance and safety of lithium-ion batteries, etc.

Active Publication Date: 2020-12-29
NINGDE AMPEREX TECH
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the use of lithium-ion batteries, when the charging control circuit fails, the lithium-ion battery is prone to overcharge, causing an irreversible reduction reaction of lithium ions in the negative electrode, reducing the charge-discharge cycle efficiency of the lithium-ion battery
When the charging voltage reaches the decomposition voltage of the electrolyte, the electrolyte will decompose at the positive electrode of the lithium-ion battery and generate gas, which will increase the pressure and temperature inside the lithium-ion battery and reduce the stability, thus seriously affecting the high-temperature cycle of the lithium-ion battery. and swelling performance and safety, and even lead to the complete failure of 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
  • Electrochemical device and electronic device
  • Electrochemical device and electronic device
  • Electrochemical device and electronic device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0119] Preparation of negative electrode

[0120] The negative electrode in the electrochemical device of the present application can be prepared using any known method. For example, a binder, a solvent, a thickener, a conductive material, a filler, etc. are added to the negative electrode active material to form a slurry, and the slurry is coated on the negative electrode current collector, and after drying, press to form electrodes. The negative electrode active material can also be roll-formed to form a sheet-like electrode, or formed into a granular electrode by compression-molding.

[0121] II. Electrolyte

[0122] The electrolytic solution used in the electrochemical device of the present application includes an electrolyte and a solvent for dissolving the electrolyte. In some embodiments, the electrolyte solution used in the electrochemical device of the present application further includes additives.

[0123] Another main feature of the electrochemical device o...

Embodiment

[0282] The performance evaluation of the examples and comparative examples of the lithium-ion battery according to the present application will be described below.

[0283] 1. Preparation of lithium ion battery

[0284] 1. Preparation of negative electrode

[0285] Mix artificial graphite, styrene-butadiene rubber and sodium carboxymethyl cellulose with deionized water in a mass ratio of 96%:2%:2%, and stir evenly to obtain negative electrode slurry. This negative electrode slurry was coated on a 12 μm current collector. Drying, cold pressing, cutting into pieces and welding tabs to obtain the negative electrode.

[0286] 2. Preparation of positive electrode

[0287] Lithium cobalt oxide (LiCoO 2 ), conductive material (Super-P) and polyvinylidene fluoride (PVDF) are mixed with N-methylpyrrolidone (NMP) according to the mass ratio of 95%:2%:3%, and stirred evenly to obtain positive electrode slurry. The positive electrode slurry was coated on a 12 μm aluminum foil, dried,...

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
Surface roughnessaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to an electrochemical device and an electronic device, and specifically provides an electrochemical device, which comprises a positive electrode, a negative electrode and an electrolytic solution, wherein the negative electrode comprises a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, the negative electrode current collector contains tin, and the electrolytic solution comprises a compound containing a sulfur-oxygen double bond. The electrochemical device provided by the invention has improved high-temperature cycle performance and anti-overcharge performance.

Description

technical field [0001] The present application relates to the field of energy storage, in particular to an electrochemical device and an electronic device, especially a lithium ion battery. Background technique [0002] With the development of technology and the increase in the demand for mobile devices, people's demand for electrochemical devices (such as lithium-ion batteries) under different usage conditions has increased significantly, thus putting forward higher requirements for the performance of lithium-ion batteries, Including high capacity, long cycle life, high temperature resistance, high rate discharge performance and anti-overcharge performance, etc. [0003] During the use of lithium-ion batteries, when the charging control circuit fails, the lithium-ion battery is prone to overcharge, causing an irreversible reduction reaction of lithium ions in the negative electrode, reducing the charge-discharge cycle efficiency of the lithium-ion battery. When the chargin...

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): H01M4/13H01M4/139H01M4/66H01M10/0525H01M10/0567H01M10/42
CPCH01M4/13H01M10/0525H01M10/0567H01M4/139H01M4/661H01M4/662H01M10/4235Y02E60/10
Inventor 王可飞
Owner NINGDE AMPEREX 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