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

Preparation method of high-temperature capacity spinel lithium manganese oxide

A technology of spinel lithium manganese oxide and capacity, applied in chemical instruments and methods, manganese compounds, structural parts, etc., can solve the problems of reducing specific capacity, etc., and achieve the effect of improving high temperature performance, obvious stabilization effect and high reactivity

Active Publication Date: 2021-11-16
江西智锂科技股份有限公司
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the doping amount of doping elements is low, the high-temperature cycle performance is limited, and the higher doping amount will reduce its specific capacity.

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 high-temperature capacity spinel lithium manganese oxide
  • Preparation method of high-temperature capacity spinel lithium manganese oxide
  • Preparation method of high-temperature capacity spinel lithium manganese oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of preparation method of high-temperature capacity spinel lithium manganate of the present invention, prepares high-temperature spinel lithium manganate, according to chemical formula Li 1+x mn 2-y MyO 4 Lithium-manganese ratio.

[0045] Use the following method steps:

[0046] 1) Synthesis of trimanganese tetraoxide precursor,

[0047] Using the air oxidation liquid phase precipitation process, the manganese source solution, the impurity element M and the precipitant are placed in the reaction device for a mixed reaction, and the reaction temperature is controlled at 50-70 ° C to prepare the trimanganese tetraoxide precursor; Control the manganese source solution to be 0.53mol / L-1.0 mol / L; the manganese source solution is prepared by mixing complexing agent, dispersant, surfactant and manganese salt;

[0048] Controlling the complexing agent to be a mixture of EDTA-2Na with a concentration of 0.001-0.05mol / L and urea with a concentration of 0.001-0.1mol / L; ...

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
particle sizeaaaaaaaaaa
densityaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The present invention is to provide a preparation method of high-temperature-capacity spinel lithium manganese oxide, using soluble manganese salt as raw material, including the following method steps, synthesizing the trimanganese tetraoxide precursor, preparing the initial material for mixed firing, and using solid phase two Secondary sintering process, the spinel lithium manganate synthesized by this method has an initial capacity of more than 120mAh / g at a high temperature of 55°C, and a 100-cycle cycle capacity retention rate of more than 95%. The synthesis method has the advantages of simple synthesis equipment, mild synthesis conditions and suitability for industrial production.

Description

Technical field: [0001] The invention relates to a preparation method of lithium manganate material for lithium batteries, in particular to a preparation method of high-temperature capacity spinel lithium manganate. Background technique: [0002] As a new type of green secondary battery, lithium-ion battery is widely used in wireless communication, transportation, aerospace and other aspects. Lithium-ion battery cathode material is one of the key materials in lithium-ion batteries, and its performance will directly affect the performance of the entire lithium-ion battery. [0003] Spinel lithium manganese oxide has the advantages of high voltage, good safety, abundant resources, and less pollution, and is one of the most promising cathode materials. However, the capacity of spinel lithium manganese oxide decays rapidly at high temperature, which seriously limits its practical application in new energy vehicle power batteries and other fields. In the prior art, the high-tem...

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 Patents(China)
IPC IPC(8): H01M4/505
CPCC01G45/1242C01P2002/32C01P2004/03C01P2004/51C01P2006/11C01P2006/12H01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 郝伟刘龙辉
Owner 江西智锂科技股份有限公司
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