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

A kind of ternary cathode material and preparation method thereof

A positive electrode material, graphene technology, applied in the field of ternary positive electrode materials and its preparation, can solve the problems of cycle performance decline, powder resistivity increase, etc., achieve the effect of reducing powder resistivity, obvious effect, and improving cycle performance

Active Publication Date: 2022-03-29
NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the technical defects that the powder resistivity increases and the cycle performance decreases during the preparation and modification process of the ternary positive electrode material, and to provide a ternary positive electrode material and its preparation method

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
  • A kind of ternary cathode material and preparation method thereof
  • A kind of ternary cathode material and preparation method thereof
  • A kind of ternary cathode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The ternary cathode material described in Example 1 and Comparative Example 1 is Li n Ni 1-x-y co x mn y o 2 , wherein 0<x<0.5, 0<y<0.5, 0.9<n<1.5, preferably NMC811.

[0034] The size of the graphene oxide described in Example 1 is 0.2 μm, the number of layers is 3 layers, C:O=1.9, and the concentration of the graphene oxide solution is 2 g / L.

[0035] Example 1

[0036] A preparation method of a ternary cathode material, comprising the steps of:

[0037] (1) Add ternary positive electrode material and deionized water according to the ratio of material to water ratio of 2:1 in the washing process, and add 0.0016% (based on graphene oxide weight, the mass ratio to ternary positive electrode material is 0.0016%) graphite oxide Graphene solution, stirred in water washing equipment at a stirring speed of 80r / min for 30min, so that graphene oxide is uniformly and fully coated on the surface of the ternary positive electrode material;

[0038] (2) After the ternary po...

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
sizeaaaaaaaaaa
electron mobilityaaaaaaaaaa
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a ternary positive electrode material and a preparation method thereof. The preparation method comprises the following steps: (1) Washing: adding water to wash the ternary positive electrode material, adding a graphene oxide solution and stirring to obtain the washed ternary positive electrode material. A ternary positive electrode material coated with graphene oxide; (2) drying: the ternary positive electrode material coated with graphene oxide is filtered and dried to obtain a ternary positive electrode material coated with graphene oxide after drying; ( 3) Sintering: sintering the dried graphene oxide-coated ternary cathode material to obtain a graphene-coated ternary cathode material. The present invention not only reduces the powder resistivity of the ternary positive electrode material, but also reduces the powder resistivity of the ternary positive electrode material by coating the graphene oxide during the water washing process of the ternary positive electrode material and generating a high-conductivity conductive layer on the surface of the ternary positive electrode material through the subsequent high-temperature sintering process. Moreover, the cycle performance of the ternary cathode material is improved.

Description

technical field [0001] The invention relates to the technical field of modification of ternary positive electrode materials, in particular to a ternary positive electrode material and a preparation method thereof. Background technique [0002] Compared with cathode materials such as lithium iron phosphate, high-nickel ternary cathode materials have the advantages of high specific capacity, high working voltage, and high ion and electronic conductivity. With the continuous improvement of energy density requirements of subsidy policies, the demand for ternary cathode materials by battery cell enterprises is increasing day by day. [0003] The improvement of the capacity of the ternary cathode material is due to the increase of Ni content in the material, but the consequences are the increase of pH, the increase of gas production of the charged core, and the decrease of high temperature and normal temperature cycle performance. [0004] In order to improve a series of problems...

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): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCY02E60/10
Inventor 时志翔于建谢恒斌金国山袁徐俊佘圣贤
Owner NINGBO RONBAY LITHIUM BATTERY MATERIAL 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