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

A ternary cathode material with low gas production and high capacity

A cathode material and substrate technology, which is applied in the field of electrochemistry, can solve the problems of intensified side reactions between cathode active materials and electrolytes, reduced reversible gram capacity of active materials, and deteriorated gas production performance at high temperature, so as to improve thermal stability and production. Gas phenomenon, good crystal structure stability, the effect of suppressing side reactions

Active Publication Date: 2021-11-23
CONTEMPORARY AMPEREX TECH CO
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of nickel content, the direct side reaction between the positive electrode active material and the electrolyte is also significantly intensified, and the high-temperature gas production performance is significantly deteriorated, which is one of the bottlenecks in mass production and commercialization.
[0003] At present, at the material level, the main means to solve the performance of high-temperature gas production will lead to different degrees of damage to the performance of the battery: for example, the reversible gram capacity of the active material is reduced, and the cycle performance is deteriorated.

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
  • A ternary cathode material with low gas production and high capacity
  • A ternary cathode material with low gas production and high capacity
  • A ternary cathode material with low gas production and high capacity

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The third aspect of the present invention provides the preparation method of the cathode material provided by the first aspect of the present invention, comprising:

[0039] Provide the substrate;

[0040] A cladding layer is formed on the surface of the substrate.

[0041] The preparation method of the positive electrode material provided by the present invention may include: providing a substrate. The method for providing the base material should be known to those skilled in the art, for example, it may include: mixing and sintering the raw materials of the base material to provide the base material. Those skilled in the art can select appropriate raw materials and proportions of the substrate according to the elemental composition of the substrate. For example, the raw materials of the substrate may include ternary material precursors of nickel, cobalt, manganese and / or aluminum, sources of lithium, sources of M, sources of Me, sources of A, etc., and the ratio of ...

Embodiment 1

[0056] (1) The specific preparation process of the positive electrode material is:

[0057] a. Preparation of substrate precursor:

[0058] Nickel sulfate, manganese sulfate, and cobalt sulfate are formulated into a solution with a concentration of 1mol / L according to the molar ratio of Ni:Co:Mn of 8:1:1, and lithium nickel with a larger particle size is prepared by using hydroxide co-precipitation technology. Precursor Ni of transition metal oxide A 0.8 co 0.1 mn 0.1 (OH) 2 . In the process of preparing the precursor, the reaction time is 75h-125h, the pH value during co-precipitation is 7.5-8.5, and the ammonia concentration is 1mol / L.

[0059] b. Preparation method of cathode material:

[0060] The ternary material precursor Ni 0.8 co 0.1 mn 0.1 (OH) 2 and LiOH·H 2 O is placed in a mixing equipment for mixing, and then placed in an atmosphere furnace for sintering at 800 ° C. After cooling, it is mechanically ground to become the base material of the ternary mate...

Embodiment 2

[0074] The preparation method of the positive electrode material is basically the same as in Example 1, except that the coating additive is zirconia, and the content of the coating element is 4.6mg / cm 3 .

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of electrochemistry, in particular to a ternary cathode material with low gas production and high capacity. The invention provides a positive electrode material, including a base material, the molecular formula of the base material is Li x Ni y co z m k Me p o r A m , where, 0.95≤x≤1.05, 0.50≤y≤0.95, 0≤z≤0.2, 0≤k≤0.4, 0≤p≤0.05, 1≤r≤2, 0≤m≤2, m+r≤2 ; The base material is provided with a coating layer, the coating layer includes coating elements; the nickel stripping absorbance per unit mass of the positive electrode material w≤0.7. The positive electrode material of the present invention has good crystal structure stability and surface inertness, and the nickel stripping absorbance of the positive electrode material is low, so that the side reaction between the positive electrode material and the electrolyte can be effectively suppressed, thereby optimizing cycle performance, improving thermal stability and Gas phenomenon.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a ternary cathode material with low gas production and high capacity. Background technique [0002] With the escalation of energy crisis and environmental problems, the development of new green energy is imminent. Lithium-ion batteries have the advantages of high specific energy, wide application temperature range, low self-discharge rate, long cycle life, good safety performance, and no pollution, and have been used in various fields. Lithium-ion batteries have been gradually tried all over the world as the energy system of automobiles to replace traditional internal combustion locomotives. However, the commonly used lithium iron phosphate (LiFePO 4 ), low nickel ternary (LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ), etc., due to the limitations of the nature of the material itself, it cannot fully meet the energy density requirements of the power battery for the positive electrode materia...

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): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/525H01M4/628H01M4/505H01M10/0525H01M2004/028H01M4/62Y02E60/10H01M4/131C01G53/50C01G53/006C01P2004/50C01P2004/51C01P2004/61C01P2004/62C01P2006/12C01P2006/40C01P2006/80H01M2004/021
Inventor 杜锐王嗣慧刘勇超罗炽赵德宇柳娜
Owner CONTEMPORARY AMPEREX TECH CO
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