Preparation method of lithium zirconate-coated ternary layered cathode material of lithium ion battery

A ternary layered, positive electrode material technology, applied in the direction of battery electrodes, electrical components, secondary batteries, etc., can solve the impact of electrochemical performance, uneven thickness of the coating layer, poor bonding between the coating layer and the main phase, etc. problems, to achieve the effect of easy control of reaction conditions, no need for special protection, and high production efficiency

Inactive Publication Date: 2015-11-11
UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for materials prepared by this "post-coating" method, the bonding force between the coating layer and the main phase is often poor, and the thickness of the coating layer is not uniform, which affects the electrochemical performance, especially the high-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
  • Preparation method of lithium zirconate-coated ternary layered cathode material of lithium ion battery
  • Preparation method of lithium zirconate-coated ternary layered cathode material of lithium ion battery
  • Preparation method of lithium zirconate-coated ternary layered cathode material of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) According to the molar ratio of 1:1:1, NiSO 4 、CoSO 4 , MnSO 4 Dissolve in 50 mL of water so that the total molar concentration of metal Ni ions, metal Co ions and metal Mn ions is 1 mol / L to obtain a mixed solution of metal ions. Then configure 1mol / L H 2 C 2 o 4 Solution 50mL, H under magnetic stirring 2 C 2 o 4 The solution was added to the mixed solution of metal ions, and a large amount of precipitation was produced immediately. After stirring for 2 hours, centrifuged, washed twice with deionized water and absolute ethanol, and dried in an oven at 80°C for 12 hours, the oxalate precursor was obtained. body;

[0029] (2) ZrO 2 Synthesis of coated oxalate precursor: Weigh 500 mg of the above-obtained oxalate precursor and disperse it in 10 mL of absolute ethanol, stir and ultrasonically disperse. According to the molar ratio of Zr:(Ni+Co+Mn)=3:100, Zr(OC 4 h 9 ) 4 Anhydrous ethanol solution, stir to disperse evenly. Then the mixed solution was trans...

Embodiment 2

[0034] (1) According to the molar ratio of 4:3:3, NiSO 4 、CoSO 4 , MnSO 4 Dissolve in 50 mL of water so that the total molar concentration of metal Ni ions, metal Co ions and metal Mn ions is 1 mol / L to obtain a mixed solution of metal ions. Then configure 1mol / L H 2 C 2 o 4 Solution 50mL, H under magnetic stirring 2 C 2 o 4 The solution was added to the mixed solution of metal ions, and a large amount of precipitation was produced immediately. After stirring for 2 hours, centrifuged, washed twice with deionized water and absolute ethanol, and dried in an oven at 80°C for 12 hours, the oxalate precursor was obtained. body;

[0035] (2) ZrO 2 Synthesis of coated oxalate precursor: Weigh 2 g of the oxalate precursor obtained above and disperse it in 25 mL of absolute ethanol, add 50 μL of ammonia water, stir and ultrasonically disperse. According to the molar ratio of Zr:(Ni+Co+Mn)=3:100, Zr(OC 4 h 9 ) 4 Anhydrous ethanol solution, stir to disperse evenly. Then the...

Embodiment 3

[0038] (1) According to the molar ratio of 5:3:2, NiSO 4 、CoSO 4 , MnSO 4 Dissolve in 50 mL of water so that the total molar concentration of metal Ni ions, metal Co ions and metal Mn ions is 1 mol / L to obtain a mixed solution of metal ions. Then configure 1mol / L H 2 C 2 o 4 Solution 50mL, H under magnetic stirring 2 C 2 o 4 The solution was added to the mixed solution of metal ions, and a large amount of precipitation was produced immediately. After stirring for 2 hours, centrifuged, washed twice with deionized water and absolute ethanol, and dried in an 80-degree oven for 12 hours, the oxalate precursor was obtained. body;

[0039] (2) ZrO 2 Synthesis of coated oxalate precursor: Weigh 500 mg of the above-obtained oxalate precursor and disperse it in 10 mL of absolute ethanol, stir and ultrasonically disperse. According to the molar ratio of Zr:(Ni+Co+Mn)=5:100, Zr(OC 4 h 9 ) 4 Anhydrous ethanol solution, stir to disperse evenly. Then the mixture was transferre...

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 relates to a preparation method of a lithium zirconate-coated ternary layered cathode material of a lithium ion battery, and belongs to the technical field of new energy sources. Coating is realized by a hydrothermal method or a room-temperature stirring method; and the method specifically comprises the following three steps: preparation of an oxalate precursor, preparation of a ZrO2-coated oxalate precursor and preparation of a lithium zirconate-coated ternary layered cathode material. According to the method, the bonding strength between a coating layer Li2ZrO3 or Li4ZrO4 and a ternary cathode material of a main phase can be improved; the coating layer is uniform in thickness; and the rate capability and the cycling stability of the lithium ion battery, especially the rate capability are significantly improved. The method provided by the invention is simple in synthetic process, high in production efficiency and suitable for large-scale production, and has the advantages that the materials required by a reactant are available, nontoxic and low in cost; special protection is not needed in the production process; the reaction condition is easy to control; and the obtained product has the advantages of high yield, good result repeatability and the like.

Description

technical field [0001] The invention relates to lithium zirconate lithium ion conductor series materials (mainly Li 2 ZrO 3 and Li 4 ZrO 4 ) The preparation method of the ternary layered cathode material of the coated lithium ion battery belongs to the technical field of new energy. Background technique [0002] The depletion of traditional fossil fuels and the increasingly serious environmental pollution make the development of new energy sources imminent. The comprehensive application of new energy batteries and technical difficulties in powerization are reflected in the application and technical difficulties of electric vehicle power batteries. Lithium-ion batteries are considered to be one of the most promising energy storage systems that can realize power batteries, but the current energy density, power density and safety of lithium-ion batteries cannot meet the development needs of electric vehicles. As the only material that provides lithium ions in lithium-ion b...

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 Applications(China)
IPC IPC(8): H01M4/36H01M4/485
CPCH01M4/366H01M4/485H01M10/0525Y02E60/10
Inventor 刘向峰张继成胡中波
Owner UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap