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

Method for producing cobaltosic oxide by calcining aluminum and manganese doped small-particle-size cobalt carbonate

A technology of cobalt tetroxide and cobalt carbonate, applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve the problems of corroding equipment, increasing the content of magnetic foreign matter, and unusable products, and achieves uniform distribution of doping elements, uniform morphology, and magnetic foreign matter. low effect

Pending Publication Date: 2020-12-29
GEM CO LTD +1
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first method is easy to operate, but due to the uneven heating in the roller kiln and the different areas in contact with the air, the shape of the product obtained is not uniform; the second method is directly calcined and heated evenly, but due to direct calcination will cause its Moisture corrodes the equipment under high temperature conditions, which greatly increases the content of magnetic foreign matter in the product, making the product unusable

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 producing cobaltosic oxide by calcining aluminum and manganese doped small-particle-size cobalt carbonate
  • Method for producing cobaltosic oxide by calcining aluminum and manganese doped small-particle-size cobalt carbonate
  • Method for producing cobaltosic oxide by calcining aluminum and manganese doped small-particle-size cobalt carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Put small particle size (4 microns) cobalt carbonate doped with aluminum and manganese (aluminum 6000ppm; manganese 1000ppm) into the burning boat; set the temperature of the roller kiln to 2 stages: the first stage feeds at 200°C, and the holding time is 4 hours , 2 hours to 400 ° C, heat preservation for 6 hours, discharge, and then put into the rotary kiln, the temperature of the rotary kiln is set to 710 ° C, adjust the parameters so that the particles stay in the kiln for 4 hours, and finally get Al-Mn doped Cobalt tetroxide product with uniform appearance, such as figure 1 , tap density 2.20, specific surface area 3.45, magnetic foreign matter 50ppb.

Embodiment 2

[0020] Put the cobalt carbonate with small particle size (5 microns) doped with aluminum and manganese (7000ppm aluminum; 2000ppm manganese) into the burning boat; set the temperature of the roller kiln to 2 stages: the first stage feeds at 100°C, and the holding time is 3 hours , heat up to 500°C for 1 hour and hold for 7 hours, discharge the material, and then put it into the rotary kiln. The temperature of the rotary kiln is set to 700°C, and the parameters are adjusted so that the residence time of the particles in the kiln is 5 hours, and finally the aluminum-manganese-doped Cobalt tetroxide product with uniform appearance, tap density 2.06, specific surface area 3.97, magnetic foreign matter 40ppb.

Embodiment 3

[0022] Put cobalt carbonate with small particle size (4 microns) doped with aluminum and manganese (aluminum 8000ppm; manganese 1000ppm) into the burning boat; set the temperature of the roller kiln to 2-stage method: the first stage feeds at 300°C, and the holding time is 5 hours , 3 hours to 300 ° C, heat preservation for 5 hours, discharge, and then put into the rotary kiln, the temperature of the rotary kiln is set to 750 ° C, adjust the parameters so that the particles stay in the kiln for 3 hours, and finally get Al-Mn doped Cobalt tetroxide product with uniform appearance, tap density 2.33, specific surface area 2.41, magnetic foreign matter 45ppb.

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

No PUM Login to View More

Abstract

The invention discloses a method for producing cobaltosic oxide by calcining aluminum and manganese doped small-particle-size cobalt carbonate, which comprises the following steps: decomposing and oxidizing cobalt carbonate into cobaltosic oxide in a roller kiln under the condition of air, and then conveying to a rotary kiln for high-temperature calcination, so that the product is uniform in morphology, uniform in doped element distribution and low in magnetic foreign matter content; therefore, the electrochemical performance of the sintered lithium cobalt oxide meets the requirements.

Description

technical field [0001] The invention relates to the field of production of battery material precursors, in particular to a method for producing cobalt tetroxide by calcining aluminum and manganese doped cobalt carbonate with a small particle size. Background technique [0002] Cobalt tetroxide is the main raw material of lithium cobalt oxide, which is mainly used in the field of 3C electronic products. The main problem with lithium cobalt acid in current use is that the theoretical voltage is above 4.2V, but the current average is only 3.6V, and the highest has not reached 4.0V. The theoretical specific capacity is 260h A / kg, and the actual specific capacity is 130h A / kg. , and the capacity decreased with increasing cycle times. In order to release higher energy in a smaller space, lithium cobaltate is developing towards a high voltage of 4.5-4.6V. Under high voltage, more lithium ions can be extracted from the crystal structure. At present, it can be obtained by doping Th...

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): C01G51/04
CPCC01G51/04C01P2006/11C01P2006/12
Inventor 许开华李晨威刘文泽杨航易全瑞郭苗苗张冬冬
Owner GEM CO LTD
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