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

Coated ternary material and application thereof

A ternary material and coating technology, applied in nanotechnology, electrical components, nanotechnology, etc. for materials and surface science, can solve the problems of DCR growth, thermodynamic instability, battery electrochemical performance degradation, etc., to achieve Good ionic conductivity and electronic conductivity, improved cycle stability and rate performance, and improved lattice compatibility

Pending Publication Date: 2022-08-05
ENVISION DYNAMICS TECH (JIANGSU) CO LTD +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the working voltage of commercial ternary material batteries is about 4.2-4.35V, and the utilization rate of reversible lithium is not enough. In order to further improve the volume energy density of ternary batteries, it is necessary to increase the charging voltage
However, when the charging voltage exceeds 4.4 V, the electrochemical performance of the battery will drop sharply due to the thermodynamic instability of the layered structure in the highly delithiated state, and the degradation of the cathode / electrolyte interface due to surface side reactions, It shows that the gas production increases seriously, and the DCR (DC internal resistance) increases significantly during the cycle
[0003] Coating an alumina coating on the surface of the ternary material can effectively improve the above problems. A layer of dense alumina coating is formed on the surface of the coated ternary material, which can minimize the side reactions at the electrode-electrolyte interface and control the cycle. When the impedance increases; however, the coating itself usually exhibits poor Li + Conductivity, and hinder surface charge transfer, will deteriorate cycle and rate performance

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
  • Coated ternary material and application thereof
  • Coated ternary material and application thereof
  • Coated ternary material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a coated ternary material, and the core composition of the coated ternary material is LiNi 0.58 Co 0.11 Mn 0.31 O 2, the cladding layer is WAO material, and the WAO material is tungsten oxide-doped alumina;

[0043] Based on the mass of the clad ternary material, the mass percentage of the WAO material is 0.54 wt %, the content of the Al element is 1000 ppm, and the content of the W element is 2800 ppm;

[0044] In the WAO material, the mass ratio of Al element and W element is 1:3;

[0045] The preparation raw materials of the coated ternary material include ternary material a sintered product, WAO material and ethanol;

[0046] The preparation method of the coated ternary material comprises the following steps:

[0047] Mix the first sintered ternary material, WAO material and ethanol, stir to completely volatilize the ethanol, and then sinter the obtained mixture at 450 °C for 15 h to obtain the coated ternary material. The SEM image of ...

Embodiment 2

[0050] This embodiment provides a coated ternary material, and the core composition of the coated ternary material includes LiNi 0.6 Co 0.12 Mn 0.28 O 2 , the cladding layer is WAO material, and the WAO material is tungsten oxide-doped alumina;

[0051] Based on the mass of the cladding ternary material, the mass percentage of the WAO material is 0.3 wt %, the content of the Al element is 700 ppm, and the content of the W element is 1400 ppm;

[0052] In the WAO material, the mass ratio of Al element and W element is 1:2;

[0053] The preparation raw materials of the coated ternary material include ternary material a sintered product, WAO material and ethanol;

[0054] The preparation method of the coated ternary material comprises the following steps:

[0055] Mixing the first sintered product of ternary material, WAO material and ethanol, after stirring to completely volatilize the ethanol, the obtained mixture is sintered at 300°C for 18 hours to obtain the coated tern...

Embodiment 3

[0058] This embodiment provides a coated ternary material, and the core composition of the coated ternary material includes LiNi 0.58 Co 0.11 Mn 0.31 O 2 , the cladding layer is WAO material, and the WAO material is tungsten oxide-doped alumina;

[0059] Based on the mass of the coated ternary material, the mass percentage of the WAO material is 0.7 wt %, the content of the Al element is 1000 ppm, and the content of the W element is 4000 ppm;

[0060] In the WAO material, the mass ratio of Al element and W element is 1:4;

[0061] The preparation raw materials of the coated ternary material include ternary material a sintered product, WAO material and ethanol;

[0062] The preparation method of the coated ternary material comprises the following steps:

[0063] Mixing the first sintered ternary material, WAO material and ethanol, stirring to completely volatilize the ethanol, and sintering the obtained mixture at 600°C for 10 hours to obtain the coated ternary material; ...

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 provides a coated ternary material and application thereof, a coating layer of the coated ternary material comprises a WAO material, and the WAO material is tungsten oxide doped aluminum oxide. The WAO-doped aluminum oxide material is adopted as the coating layer of the ternary material, the problem of poor conductivity of the aluminum oxide coating layer is solved, the WAO coating layer has good ionic conductivity and electronic conductivity in combination with the dynamic advantage of W < 6 + >, the lattice compatibility of the coating layer and the ternary material is improved, and the conductivity of the ternary material is improved. And the cycling stability and the rate capability of the ternary material are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a ternary material, in particular to a coated ternary material and its application. Background technique [0002] At present, the working voltage of commercial ternary battery is about 4.2-4.35V, and the utilization rate of reversible lithium is not enough. In order to further improve the volume energy density of ternary battery, it is necessary to increase the charging voltage. However, when the charging voltage exceeds 4.4 V, the electrochemical performance of the battery will drop sharply due to the thermodynamic instability of the layered structure in the high delithiation state, and the degradation of the cathode / electrolyte interface due to surface side reactions, It is manifested as a serious increase in gas production, and a significant increase in DCR (direct current internal resistance) during the cycle. [0003] Coating the alumina coating on the surface of the ternar...

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): H01M4/36H01M4/62H01M10/0525B82Y40/00B82Y30/00H01M4/505H01M4/525
CPCH01M4/366H01M4/624B82Y40/00B82Y30/00H01M10/0525H01M4/505H01M4/525H01M2004/028Y02E60/10
Inventor 杨元婴莫方杰朱呈岭杨文龙孙化雨
Owner ENVISION DYNAMICS TECH (JIANGSU) CO LTD
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