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

Lithium-ion battery cathode material, preparation method thereof, and lithium-ion battery

A lithium-ion battery and positive electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of no overheating protection, accidents, fires, etc., to achieve convenient operation, eliminate safety hazards, and improve energy Effects of Density and Safety of Use

Active Publication Date: 2020-04-17
SOUNDON NEW ENERGY TECH CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing lithium-ion batteries do not have overheating protection function. Under extreme conditions such as overcharge, overdischarge and short circuit, a large amount of heat will be released, which can easily cause fire and cause accidents.

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-ion battery cathode material, preparation method thereof, and lithium-ion battery
  • Lithium-ion battery cathode material, preparation method thereof, and lithium-ion battery
  • Lithium-ion battery cathode material, preparation method thereof, and lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0057] According to the second aspect of the present invention, the present invention provides a method for preparing the above-mentioned lithium ion battery cathode material, which includes the following steps:

[0058] The heat-sensitive functional layer is coated on the surface of the positive electrode material particles by a sputtering method to obtain a lithium ion battery positive electrode material.

[0059] The method for preparing the positive electrode material of lithium ion battery provided by the present invention coats the thermosensitive functional layer on the surface of the positive electrode active material particles by sputtering, so that the thermistor functional layer coats the positive electrode active material particles uniformly without affecting the positive electrode The morphology of the active material particles.

[0060] In a preferred embodiment of the present invention, the preparation method of a lithium ion battery cathode material specifically inclu...

Embodiment 1

[0068] This embodiment provides a lithium ion battery cathode material, which includes a core formed by nickel cobalt lithium aluminate particles with a particle size of 100 μm and a thermistor functional layer with a thickness of 30 nm covering the surface of the core. The thermistor functions The layer is made of graphene and polypropylene with a particle diameter of 20 nm, wherein the volume ratio of graphene in the thermistor functional layer is 20%.

Embodiment 2

[0070] This embodiment provides a lithium ion battery cathode material, including a core formed by lithium nickel cobalt manganate particles with a particle size of 5 μm and a thermistor functional layer with a thickness of 5 nm covering the surface of the core. The thermistor functions The layer is made of carbon nanotubes with a particle diameter of 5 nm and polyethylene, wherein the volume ratio of the carbon nanotubes in the thermistor functional layer is 80%.

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
temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a cathode material for a lithium ion battery and a preparation method of the cathode material as well as the lithium ion battery and relates to the technical field of electrodematerials. The cathode material comprises cathode active material particles and thermistor functional layers coating the surfaces of the cathode active material particles. According to the invention,the technical problems that an existing lithium ion battery has no overheat protecting function and can release a large amount of heat under extreme conditions of overcharge, over discharge, short circuit and the like, so that fires are easily caused and lead to accidents are solved. After the lithium ion battery is raised to a certain temperature, resistance values of the thermistor functional layers jump and the lithium ion battery stops work, so that safety accidents such as the fires caused by the lithium ion battery under the extreme conditions of overcharge, over discharge, short circuitand the like are effectively avoided and the technical effect of eliminating potential safety hazards of the lithium ion battery is realized.

Description

Technical field [0001] The invention relates to the technical field of electrode materials, in particular to a lithium ion battery cathode material and a preparation method thereof and a lithium ion battery. Background technique [0002] Since 1980 Goodenough et al. proposed lithium cobalt oxide (LiCoO 2 ) As the cathode material of lithium secondary batteries, after unveiling the embryonic form of the development of lithium-ion batteries, lithium-ion batteries have subsequently developed rapidly. Since Japan's Sony Corporation put lithium-ion batteries into the market in 1990, lithium-ion batteries have been widely used in portable electronic equipment, electric vehicles, and energy storage. [0003] Lithium-ion battery cathode materials provide lithium needed for reciprocating intercalation / deintercalation between the anode and cathode materials and the formation of a solid electrolyte interface on the surface of the anode material, which plays a key role in lithium batteries. H...

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 Patents(China)
IPC IPC(8): H01M4/62H01M10/0525
CPCH01M4/62H01M4/625H01M4/626H01M10/0525Y02E60/10
Inventor 范欢欢娄忠良温转萍
Owner SOUNDON NEW ENERGY TECH 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