Coated multi-element positive electrode material for lithium ion battery, preparation method and application thereof

A positive electrode material and coating technology, which is applied in the field of lithium ion battery electrode materials, can solve the problems of poor high temperature cycle stability and poor material cycle stability.

Active Publication Date: 2020-08-21
SHENZHEN CITY BATTERY NANOMETER TECH
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention improves the electrochemical performance of the material by coating it with a specific metal-doped composite oxide, and can also

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 multi-element positive electrode material for lithium ion battery, preparation method and application thereof
  • Coated multi-element positive electrode material for lithium ion battery, preparation method and application thereof
  • Coated multi-element positive electrode material for lithium ion battery, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] (1) Synthesis of high-nickel precursor Ni by co-precipitation technology 0.8 co 0.1 mn 0.1 (OH) 2 , after washing, drying or heat treatment, the Ni 0.8 co 0.1 mn 0.1 (OH) 2 Precursor products.

[0087] (2) The precursor Ni 0.8 co 0.1 mn 0.1 (OH) 2 Product and lithium source are fully mixed, and wherein, lithium: the mol ratio of transition metal (Ni+Co+Mn) is 1.05. Raise the fully mixed precursor material to 800°C at 1.5°C / min in an oxygen atmosphere and keep it warm for 15 hours to obtain the untreated matrix high-nickel cathode material LiNi 0.8 co 0.1 mn 0.1 o 2 .

[0088] (3) Mix strontium oxide and indium oxide uniformly in a certain proportion (the molar ratio of indium to strontium is 9:1), sinter at 900°C for 20 hours, cool to room temperature, and use a high-energy ball mill to grind it into 200nm-500nm The powder is coated.

[0089] (4) The obtained untreated substrate high-nickel cathode material LiNi 0.8 co 0.1 mn 0.1 o 2 Add it into dei...

Embodiment 2

[0099] (1) Synthesis of high-nickel precursor Ni by co-precipitation technology 0.815 co 0.15 al 0.035 (OH) 2 , after washing, drying or heat treatment, the Ni 0.815co 0.15 al 0.035 (OH) 2 Precursor products.

[0100] (2) The precursor Ni 0.815 co 0.15 al 0.035 (OH) 2 Product and lithium source are fully mixed, and wherein, lithium: the mol ratio of transition metal (Ni+Co+Mn) is 1.05. Raise the fully mixed precursor material to 800°C at 1.5°C / min in an oxygen atmosphere and keep it warm for 15 hours to obtain the untreated matrix high-nickel cathode material LiNi 0.815 co 0.15 al 0.035 o 2 .

[0101] (3) Mix strontium oxide and indium oxide uniformly in a certain proportion (the molar ratio of indium to strontium is 9:1), sinter at 900°C for 20 hours, cool to room temperature, and use a high-energy ball mill to grind it into 200nm-500nm The powder is coated.

[0102] (4) The obtained untreated substrate high-nickel cathode material LiNi 0.815 co 0.15 al 0....

Embodiment 3

[0106] (1) Synthesis of high-nickel precursor Ni by co-precipitation technology 0.6 co 0.2 mn 0.2 (OH) 2 , after washing, drying or heat treatment, the Ni 0.6 co 0.2 mn 0.2 (OH) 2 Precursor products.

[0107] (2) Mix strontium oxide and indium oxide in a certain proportion (the molar ratio of indium to strontium is 9:1), sinter at 900°C for 20 hours, cool to room temperature, and use a high-energy ball mill to grind it into 200nm-500nm The powder is coated.

[0108] (3) The precursor Ni 0.6 co 0.2 mn 0.2 (OH) 2 The product, lithium source and the above-mentioned coating are fully mixed, and the coating amount (precursor Ni 0.6 co 0.2 mn 0.2 (OH) 2 The mass is 100%, the usage amount of coating) is 0.5%, wherein, the molar ratio of lithium:transition metal (Ni+Co+Mn) is 1.05. The fully mixed precursor material was raised to 850°C at 1.5°C / min in an oxygen atmosphere, and kept for 15 hours to obtain the coated and modified ternary cathode material, that is, the co...

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
Thicknessaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a coated multi-element positive electrode material for a lithium ion battery, a preparation method and application thereof. The coated multi-element positive electrode materialcomprises a multi-element positive electrode material and a coating layer coating the surface of the multi-element positive electrode material, wherein the chemical composition of the coating layer is element-doped In2O3 and/or element-doped CeO2, the element-doped In2O3 is Sr and/or Te element-doped In2O3, and the element-doped CeO2 is Te and/or Ge element-doped CeO2. The method comprises the step of coating a multi-element positive electrode material with a coating material, or introducing the coating material into preparation raw material components for synthesizing the multi-element positive electrode material to prepare the coated multi-element positive electrode material. The method provided by the invention can improve the first charge-discharge efficiency and cycle performance ofthe material, especially the high-temperature cycle performance.

Description

technical field [0001] The invention relates to the field of lithium ion battery electrode materials, and relates to a coated multi-element positive electrode material, its preparation method and application, and in particular to a coated ternary positive electrode material for lithium ion batteries, its preparation method and application. Background technique [0002] With the development of lithium-ion batteries, multi-component cathode materials have become the focus of current cathode materials because of their good performance. Among them, high-nickel-based layered oxide cathode materials have attracted extensive attention due to their advantages such as high specific capacity, low price, and good environmental friendliness, but their cycle stability, thermal stability, and high-temperature storage performance are poor. It is sensitive to air moisture, resulting in high processing requirements and greatly limiting its application. Most of these shortcomings are the ess...

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): H01M4/36H01M4/485H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/485H01M4/505H01M4/525H01M4/62H01M4/624H01M4/628H01M10/0525Y02E60/10
Inventor 陈超严武渭杨顺毅吴小珍黄友元
Owner SHENZHEN CITY BATTERY NANOMETER TECH
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