Method for improving electrochemical performance of lithium battery positive electrode coating material

A coating material and cathode material technology, applied in the field of lithium ion battery cathode material preparation, can solve problems such as affecting battery specific capacity, affecting lithium ion transmission, losing protection effect, etc., to improve cycle life, improve charge and discharge efficiency, reduce The effect of energy consumption

Inactive Publication Date: 2019-08-27
启东启澳新材料科技发展有限公司
View PDF14 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned common coating materials have the following problems: most of them are insulators with poor conductivity, which affect the transmission of lithium ions, thereby affecting the specific

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
  • Method for improving electrochemical performance of lithium battery positive electrode coating material
  • Method for improving electrochemical performance of lithium battery positive electrode coating material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1:

[0029] A method for preparing a conductive-enhanced lanthanum titanate-coated lithium nickel manganate positive electrode material, comprising the following steps:

[0030] (1) take by weighing lanthanum hydroxide and titanium tetrachloride in a molar ratio of 1:1;

[0031] (2) dissolving lanthanum hydroxide and tetrabutyl titanate in triethylene glycol, and heating to 60° C. to fully dissolve them to obtain mixed solution A;

[0032] (3) under the condition that the temperature of the mixed solution A is 60°C and the rotational speed of the agitator is 200 r / min, mechanical stirring is performed for 30 minutes to obtain the mixed suspension B;

[0033] (4) Under the condition of mechanical stirring at 60°C and 300r / min, add ammonia water to the mixed suspension B, and the amount of ammonia water is 5 times the weight of lanthanum hydroxide.

[0034] (5) Continue stirring the mixed suspension in step (4) at 160° C. and 300 r / min for 4 hours to obtain a la...

Example Embodiment

[0037] Example 2:

[0038] A preparation method of a conductive zinc oxide-coated lithium nickel manganate positive electrode material, comprising the following steps:

[0039] (1) take by weighing sodium hydroxide and zinc acetate by the mol ratio of 1:1;

[0040] (2) dissolving zinc acetate in methanol, heating to 60° C. to fully dissolve to obtain solution A; dissolving sodium hydroxide in methanol and stirring to obtain solution B;

[0041] (3) under the condition that the temperature of the mixed solution A is 60°C and the rotating speed of the agitator is 200r / min, the solution B is slowly added to the solution A, and mechanically stirred for 30 minutes to obtain the zinc oxide sol;

[0042] (4) at room temperature, under the mechanical stirring condition of 200r / min, according to the concentration of zinc oxide sol, take by weighing the powder of lithium nickel manganese oxide according to the molar ratio of zinc oxide: lithium nickel manganate is 0.5:9.5, The powder ...

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
Average sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for improving electrochemical performance of a lithium battery positive electrode coating material; the method for preparing the lithium battery positive electrode coating material comprises the following steps of weighing a certain amount of metal salt and/or alkali formed by metal ions and hydroxyl ions, and mixing the metal salt and/or alkali into a certain amount of low-carbon alcohol, and carrying out heating and dissolving to obtain a solution A; under the condition of mechanical stirring, adding a precipitant into the solution A, so that mixed latex is obtained; enabling the mixed sol obtained in the step (2) to be continuously stirred to obtain oxide sol; weighing a certain amount of positive electrode material powder, adding into the oxide sol obtained in the step (3), mixing under the mechanical stirring condition and standing, and washing the lower-layer precipitate, and drying to obtain the oxide coating-coated positive electrode material powder; and mixing the positive electrode material powder with a strong reducing agent, putting into a furnace, and carrying out heating and cooling to obtain a final product.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium-ion battery cathode materials, in particular to a method for improving the electrochemical performance of lithium-ion battery cathode coating materials. Background technique [0002] Lithium-ion batteries have outstanding advantages such as high voltage, high capacity, small size, light weight, environmental protection and long life, and have been widely used in various portable electronic products and electric vehicles. For the large-scale application of power lithium-ion batteries, the main challenge is how to further increase the energy density of batteries. In recent years, increasing the voltage of lithium-ion battery cathode materials is a new idea to improve the energy density of lithium-ion batteries in recent years. In the existing electrolyte system, the positive electrode material has the following problems to be solved urgently under high voltage conditions: 1. The posi...

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): H01M4/36H01M4/48H01M4/62H01M10/0525
CPCH01M4/366H01M4/48H01M4/483H01M4/624H01M10/0525H01M2004/028Y02E60/10
Inventor 张菊平
Owner 启东启澳新材料科技发展有限公司
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