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

Lithium ion battery cathode material, and preparation method thereof

A lithium-ion battery and cathode material technology, which is applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of electrode polarization and cycle instability, and achieves simple and reliable modification methods, low dosage, Strong universal effect

Inactive Publication Date: 2019-06-14
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another hazard of oxygen release is the catalysis of the reaction between the cathode and the organic electrolyte, leading to the formation of a surface resistive layer, which is one of the main causes of electrode polarization and cycle instability.

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
  • Lithium ion battery cathode material, and preparation method thereof
  • Lithium ion battery cathode material, and preparation method thereof
  • Lithium ion battery cathode material, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: preparing a lithium-rich manganese-based material with a spherical shape, the method is a carbonate co-precipitation method;

[0033]Step 2: Dissolve lithium hydroxide and tungsten trioxide powders with a molar ratio of 2:1 in deionized water at the same time, and stir the solution for 10 hours, so that the solution becomes a milky white turbid liquid;

[0034] Step 3: According to the coating amount of lithium tungstate being 2-4wt% of the lithium-rich manganese-based material, disperse the lithium-rich manganese-based material in the turbid liquid obtained in step 2, stir at room temperature for 120 minutes, and place in a water bath at 80°C Evaporate to dryness, the optimal duration of the process of evaporation to dryness is 6h;

[0035] Step 4: Grinding the black powder obtained after evaporating to dryness to make it completely dispersed;

[0036] Step 5: Sinter the black powder obtained in step 4 at a high temperature in an air atmosphere, the sintering ...

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 discloses a lithium ion battery cathode material, and a preparation method thereof. The preparation method comprises following steps: S1, a granular lithium-enriched manganese-based material, and preferable with a spherical morphology, is dispersed and dissolved in a mixed solution containing a lithium salt and a tungsten oxide; S2, a solution obtained in step S1 is dried up; and S3,a mixture obtained after drying in step S2 is grinded and dispersed, and is subjected to sintering so as to obtain the lithium-enriched manganese-based ternary cathode material, wherein the surface of the lithium-enriched manganese-based ternary cathode material is provided with a R-3 space group lithium tungstate coating layer. Operation of the preparation method is simple; only a small amount of a modifying material is capable of improving the circulation conservation rate and electrochemical performance of the lithium-enriched manganese-based material obviously, and obtaining the lithium ion battery cathode material with excellent rate capability.

Description

technical field [0001] The invention relates to a lithium ion battery electrode material, in particular to a lithium ion battery positive electrode material and a manufacturing method thereof. Background technique [0002] Lithium-ion batteries (LIBs) have attracted worldwide attention as a power source for electric vehicles (EVs) and as a source of portable energy storage. The positive electrode with high energy density determines the specific capacity of Li-ion batteries, so from this point of view, lithium-rich manganese-based materials, such as the representative Li 1.2 mn 0.54 Ni 0.13 co 0.13 o 2 (LNCMO), due to its extremely high specific capacity, has emerged as the best candidate for cathode materials for next-generation Li-ion batteries. [0003] However, the low rate performance of this material makes it impossible to obtain a practical discharge capacity comparable to its theoretical value. For this reason, the rate performance of lithium-rich manganese-base...

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): C01G53/00C01G41/00H01M4/36H01M4/48H01M4/505H01M10/0525B82Y30/00
CPCY02E60/10
Inventor 武俊伟刘彦辰崔彦辉卢娟姜琴丁志玉肖祯照
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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