Battery cathode material, preparation method thereof and lithium ion battery

A battery cathode and substrate technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor cycle performance, low price, damage to the surface structure of materials, etc., and achieve the effect of good high temperature cycle performance

Inactive Publication Date: 2015-12-16
NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD
View PDF3 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nickel cobalt lithium manganese oxide (NCM) ternary material has high reversible capacity (theoretical capacity reaches 274mAh/g), excellent safety performance and low price, and has received extensive attention from researchers, but this material is widely used in Poor cycle performance at high temperature limits its application in the direction of electric vehicles
[0003] Recent studies have shown that during the tableting process of NCM ternary materials in the preparation of batteries, the secondary particle balls of NCM materials are easily broken due to the rolling of the pole pieces, destroying the surface structure of the materials, and the NCM ternary materials are in the cycle process. Due to the dissolution of its metal ions, the surface structure of the material will be further damaged; thus, the lithium-ion battery prepared by the NCM material will be attenuated during the high-temperature cycle.
At present, the method to improve the fragmentation of materials due to rolling is to mix large

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
  • Battery cathode material, preparation method thereof and lithium ion battery
  • Battery cathode material, preparation method thereof and lithium ion battery
  • Battery cathode material, preparation method thereof and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0052] The present invention provides a method for preparing a battery positive electrode material according to the above technical solution, comprising:

[0053] The nickel-cobalt-manganese oxide and lithium salt having a single crystal structure are first calcined and then kept warm to obtain an intermediate product, and the temperature of the first calcination is 500° C. to 800° C.; the nickel-cobalt-manganese oxide is of formula Compounds shown in II:

[0054] Ni x Co y Mn (1-x-y) M a O 2 formula II;

[0055] The intermediate product is subjected to a second calcination and then kept warm to obtain a substrate with a single crystal structure, and the temperature of the second calcination is 801°C to 1100°C;

[0056] The base material is the compound shown in formula I:

[0057] LiNi x Co y Mn (1-x-y) M a O 2 formula I;

[0058] In Formula I and Formula II, 0

[0059] M is one or more of Mg, Ti, Zr, Sr and Al;

[0060] The ...

Example Embodiment

[0100] Example 1

[0101] Dissolve cobalt sulfate, nickel sulfate and manganese sulfate in water according to the molar ratio of Ni, Co and Mn to 1:1:1 to prepare a 1 mol / L mixed solution, and mix 0.1 mol / L titanium nitrate aqueous solution with the above The mixed solution is added to the reaction kettle through respective pipelines in parallel to carry out co-precipitation reaction, and the pH value of the co-precipitation reaction is controlled to be 11.2, and the obtained co-precipitation reaction product is stirred, washed and dried to obtain Ni with a D50 particle size of 3 μm. 1 / 3 Co 1 / 3 Mn 1 / 3 Ti 0.01 (OH) 2 Hydroxides of nickel cobalt manganese;

[0102] The hydroxide of nickel, cobalt and manganese was sintered at 600 ° C for 6 h to obtain Ni 1 / 3 Co 1 / 3 Mn 1 / 3 Ti 0.01 O 2 oxides of nickel cobalt manganese;

[0103] Mixing the oxides of nickel cobalt manganese and lithium carbonate by ball milling, the consumption of the oxides of nickel cobalt manganese and...

Example Embodiment

[0108] Example 2

[0109]Dissolve cobalt sulfate, nickel sulfate and manganese sulfate in water according to the molar ratio of Ni, Co and Mn to 5:2:3 to prepare a 2mol / L mixed solution, mix 0.1mol / L zirconium nitrate aqueous solution with the above The mixed solution is added to the reactor through the respective pipelines in parallel to carry out co-precipitation reaction, the pH value of the co-precipitation reaction is controlled to be 11, and the obtained co-precipitation reaction product is stirred, washed and dried to obtain Ni with a D50 particle size of 2.5 μm. 0.5 Co 0.2 Mn 0.3 Zr 0.01 (OH) 2 Hydroxides of nickel cobalt manganese;

[0110] The hydroxide of nickel, cobalt and manganese was sintered at 600 ° C for 6 h to obtain Ni 0.5 Co 0.2 Mn 0.3 Zr 0.01 O 2 oxides of nickel cobalt manganese;

[0111] The oxides of nickel cobalt manganese and lithium carbonate are mixed by ball milling, and the amount of the oxides of nickel cobalt manganese and lithium car...

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
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention provides a battery cathode material. The battery cathode material comprises a single-crystal structurized substrate and a coating layer, wherein the coating layer coats the surface of the substrate and is aluminum oxide or zirconium oxide. The battery cathode material provided by the invention comprises the single-crystal structurized substrate; by the single-crystal structurized substrate, particle breakage caused by positive sheet grinding during the battery fabrication process can be prevented; and meanwhile, with the joint effects of a doping element in the battery cathode material and the coating layer, the structural stability of the cathode material can be improved, the corrosion of an electrolyte to the material is relieved, and a lithium ion battery prepared from the cathode material has favorable high-temperature cycle performance. The invention also provides a preparation method of the battery cathode material and the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery cathode material, a preparation method thereof and a lithium ion battery. Background technique [0002] Nickel cobalt lithium manganese oxide (NCM) ternary material has high reversible capacity (theoretical capacity reaches 274mAh / g), excellent safety performance and low price, and has received extensive attention from researchers, but this material is widely used in Poor cycle performance at high temperature limits its application in the direction of electric vehicles. [0003] Recent studies have shown that during the tableting process of NCM ternary materials in the preparation of batteries, the secondary particle balls of NCM materials are easily broken due to the rolling of the pole pieces, destroying the surface structure of the materials, and the NCM ternary materials are in the cycle process. Due to the dissolution of its metal ions, the surface structure of ...

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): H01M4/505H01M4/525H01M4/485H01M4/62H01M10/0525
CPCH01M4/483H01M4/485H01M4/502H01M4/505H01M4/523H01M4/525H01M4/62H01M10/0525Y02E60/10
Inventor 毛秦钟佘圣贤黄连友陈炼袁徐俊
Owner NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD
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