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

Method for preparing high-nickel positive electrode material and high-nickel positive electrode material obtainable by the method

A positive electrode material, high nickel technology, applied in the direction of battery electrodes, structural parts, electrical components, etc., can solve the problems of long washing coating time, limited battery capacity of positive electrode materials, low temperature, etc., to achieve excellent capacitance and cycle performance, reduce The effect of residual lithium on the surface and simple process

Active Publication Date: 2021-10-15
CONTEMPORARY AMPEREX TECH CO
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the positive electrode materials suitable for lithium-ion power batteries on the market mainly include lithium iron phosphate, lithium manganese oxide, lithium nickel cobalt manganate and lithium nickel cobalt aluminate, etc., but due to lithium iron phosphate, lithium manganate and conventional nickel cobalt manganese The capacity of lithium-acid batteries is low, which cannot meet the requirements of my country's 2020 power battery capacity of 300wh / kg. Therefore, high-capacity and high-power high-nickel ternary cathode materials have become the most popular power battery cathode materials.
[0003] Ternary cathode materials, especially high-nickel ternary cathode materials, generally have problems with storage and safety performance
Although the effect of this method for removing residual lithium on the surface is good, this process not only requires low temperature, but also requires a long washing and coating time, for example, the time of washing and coating with boric acid is as long as 1 hour
Obviously, this is bad for industrial production and significantly increases production costs
Moreover, the positive electrode material produced by this coating method has a limited battery capacity and cannot meet the use requirements

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
  • Method for preparing high-nickel positive electrode material and high-nickel positive electrode material obtainable by the method
  • Method for preparing high-nickel positive electrode material and high-nickel positive electrode material obtainable by the method
  • Method for preparing high-nickel positive electrode material and high-nickel positive electrode material obtainable by the method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] In the preparation of the matrix according to step a) of the present invention, it is also possible to dope the matrix with other metals. As an example of other doped oxides, Al can be given 2 o 3 , ZrO 2 、TiO 2 , MgO, ZnO in one or more than two. The amount of other doping oxides can also be determined according to the required doping amount of other metals. In an embodiment of the present invention, the addition amount of other doping metal oxides is such that the amount of other doping metals is in the range of 100-2000 ppm relative to the total weight of the matrix.

[0037] In a specific embodiment according to the present invention, step a) is carried out as follows: first, feed the high-nickel ternary precursor, lithium hydroxide, boron-containing compounds and other doping oxides into the mixing device, and then add The mixing medium is mixed, the weight ratio of the total weight of the material to the mixing medium is 1: (0.5-2), and the mixing time is 0.5...

Embodiment

[0054] In order to facilitate understanding of the present invention, the present invention enumerates the following examples. Those skilled in the art should understand that the examples are only used to help understand the present invention, and should not be regarded as a specific limitation of the present invention.

[0055] testing method

[0056] Surface residual lithium test method:

[0057] Acid-base titration method: add 30g sample into 100ml pure water, stir for 30min, let it stand for 5min, filter with suction, take 10ml supernatant, and titrate the lithium carbonate dissolved from the positive electrode material with 0.05mol / L hydrochloric acid standard solution And lithium hydroxide, the pH electrode is used as the indicator electrode, and the end point is determined by means of the jump generated by the potential change, and the amount of residual lithium on the surface of the positive electrode material is calculated.

[0058] Initial gram capacity test method...

Embodiment 1

[0069] Add high nickel ternary precursor, lithium hydroxide, B 2 o 3 And zirconia to the oblique mixer, the molar ratio Li / Me of the ternary precursor and lithium hydroxide is 1.05, B 2 o 3 Add the amount so that the B content is 1000ppm, the weight ratio of the added zirconia is 0.2%, add polytetrafluoroethylene balls, the ratio of the total weight of the material to the weight of the polytetrafluoroethylene balls is 1:1, and the mixing time is 1h, and the initial Sintered materials, wherein: the high-nickel ternary precursor is [Ni 0.8 co 0.1 mn 0.1 ](OH) 2 . Put the prepared materials into the atmosphere roller furnace for sintering, the sintering temperature is 830°C, and the sintering atmosphere is O 2 , O 2 The concentration is 80%, the sintering time is 15h, and the high-nickel ternary positive electrode base material is obtained, and its initial capacity is 201mAh / g. Weigh a certain amount of H 3 BO 3 Add it to deionized water to make 1mol / L H 3 BO 3 solut...

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a high-nickel positive electrode material and a high-nickel positive electrode material obtainable by the method. The method comprises (i) doping a substrate with a boron-containing compound, thereby obtaining a boron-doped substrate; and (ii) coating the boron-doped substrate with an aqueous solution of a boron-containing compound at greater than Washing and coating the boron-doped substrate at a temperature of 10° C., followed by heat treatment, so as to form the high-nickel positive electrode material. The obtained high-nickel cathode material has very low residual lithium on the surface, low pH and excellent stability, and can improve the capacity, cycle, safety and storage performance of lithium-ion batteries.

Description

technical field [0001] The invention relates to a positive electrode material for a lithium ion battery, in particular to a method for preparing a high-nickel positive electrode material and a high-nickel positive electrode material obtainable by the method. The present invention also relates to a lithium-ion battery formed from the high-nickel positive electrode material. Background technique [0002] Lithium-ion batteries are gradually being used in automotive power systems due to their high energy and power density, long cycle life and other advantages. At present, the positive electrode materials suitable for lithium-ion power batteries on the market mainly include lithium iron phosphate, lithium manganese oxide, lithium nickel cobalt manganate and lithium nickel cobalt aluminate, etc., but due to lithium iron phosphate, lithium manganate and conventional nickel cobalt manganese The low capacity of lithium-acid batteries cannot meet the requirements of my country's power...

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): H01M4/525H01M10/0525
CPCH01M4/525H01M10/0525Y02E60/10
Inventor 吴奇何金华
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