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

Lithium ion battery positive-electrode composite material and lithium ion battery

一种锂离子电池、复合材料的技术，应用在锂离子电池正极复合材料及锂离子电池领域，能够解决正极活性物质稳定性的改进问题没有得到很好的解决等问题，达到良好锂离子传导能力、抑制副反应、好倍率性能的效果

Active Publication Date: 2014-04-02
TSINGHUA UNIV +1
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of improving the stability of the positive electrode active material during battery cycling has not been well resolved in the prior art.

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 positive-electrode composite material and lithium ion battery
  • Lithium ion battery positive-electrode composite material and lithium ion battery
  • Lithium ion battery positive-electrode composite material and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] [Preparation method of cathode composite material]

[0044] An embodiment of the present invention provides a method for preparing a positive electrode composite material, which includes the following steps:

[0045] S1, prepare a composite precursor, the composite precursor includes a positive electrode active material precursor and a coating layer precursor coated on the surface of the positive electrode active material precursor;

[0046] S2, reacting the composite precursor with a lithium source compound to lithiate the cladding layer precursor and positive electrode active material precursor in the composite precursor, thereby generating the positive electrode composite material.

[0047] The positive electrode active material precursor is a compound that can react with the lithium source compound to generate the positive electrode active material, specifically, it can be an oxygen-containing compound of a transition metal element. Specifically, the transition met...

Embodiment 1

[0081] Weigh 0.25g Co(OH) 2 , ultrasonically dispersed or stirred in 10mL ethanol to obtain a solid-liquid mixture. Add tetrabutyl titanate to the solid-liquid mixture, and the molar weight of the added tetrabutyl titanate is Co(OH) 2 10% of. After continuing ultrasonic oscillation or stirring, transfer the solid-liquid mixture into a dry and clean hydrothermal kettle, and take it out after heating at 150°C for 3 hours to obtain uniform amorphous TiO 2 layer formed on Co(OH) 2surface. The composite precursor and the stoichiometric ratio of LiOH?H 2 O is mixed, and the ethanol is completely evaporated to dryness, and then the temperature is raised to 800°C at a heating rate of 3°C / min, and roasted at 800°C for 5 hours, and the temperature is naturally lowered to obtain a product coated with Co ion doped Li 2 TiO 3 LiCoO 2 . see Figure 4 , the product was subjected to XRD test, showing that a pure phase of LiCoO was obtained 2 . see Figure 5 , partially enlarged th...

Embodiment 2

[0087] The conditions are exactly the same as in Example 1, the difference is only that the Co(OH) 2 Replaced by CoC 2 o 4 ?xH 2 O.

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 diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a lithium ion battery positive-electrode composite material. The lithium ion battery positive-electrode composite material comprises a positive-electrode active substance and a cladding layer cladding the surface of the positive-electrode active substance, and the material of the cladding material is a lithium-metal composite oxide having a monoclinic system structure and a space group of C2 / c The invention also relates to a lithium ion battery.

Description

technical field [0001] The invention relates to a lithium ion battery cathode composite material and the lithium ion battery. Background technique [0002] Lithium-ion battery is a new type of green chemical power source. Compared with traditional nickel-cadmium batteries and nickel-hydrogen batteries, it has the advantages of high voltage, long life, large capacity and energy density, small volume, and low self-discharge rate. Since it first entered the market in 1990, it has become more and more widely used and has been widely used in various portable electronic devices. With the rise of new energy vehicles, lithium-ion batteries are considered to be one of the ideal energy storage devices for new energy vehicles due to their excellent characteristics. [0003] Currently, the limiting factor of lithium-ion batteries is the accompanying capacity fading during cycling and the resulting poor cycle life. The reason for the capacity fading is that on the one hand, the intrins...

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): H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/485H01M4/525H01M4/131H01M4/1391H01M10/052H01M4/366H01M10/0525Y02E60/122H01M4/624C01G23/005C01G25/00C01G45/1242C01G51/42C01G53/50C01P2002/52C01P2002/72C01P2002/76C01P2004/80C01P2004/84C01P2006/40Y02E60/10
Inventor 李亚栋陆君南彩云李立宏彭卿
Owner TSINGHUA UNIV
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