Preparation method of sphere-like manganese-rich ternary precursor

A precursor, spherical-like technology, applied in chemical instruments and methods, manganese compounds, electrical components, etc., can solve the problems of difficult pH control of the reaction system, affecting product quality consistency, increasing processing costs, etc., to achieve good fluidity, Low production cost and the effect of improving crystallinity

Pending Publication Date: 2020-08-07
DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
View PDF7 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, manganese-rich ternary precursors are usually synthesized by hydroxide co-precipitation method or carbonate co-precipitation method. Low, a large amount of highly volatile ammonia water is used, and the pH control of the rea

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
  • Preparation method of sphere-like manganese-rich ternary precursor
  • Preparation method of sphere-like manganese-rich ternary precursor
  • Preparation method of sphere-like manganese-rich ternary precursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a spherical manganese-rich ternary precursor, comprising the following steps:

[0032] (1) Mix and dissolve nickel sulfate, cobalt sulfate and manganese sulfate with a molar ratio of 30:10:60 with deionized water to obtain a nickel-cobalt-manganese sulfate mixed solution A with a total metal ion concentration of 2.0mol / L;

[0033] A crystal nucleation control agent is also added in the nickel-cobalt-manganese sulfate mixed solution A, the total concentration of the crystal nucleation control agent is controlled at 0.2g / L, and the crystal nucleation control agent is ammonium sulfate;

[0034] (2) Precipitant solution B and complexing agent solution C are prepared with deionized water; the concentration of precipitant solution B is 2.0mol / L, and the precipitant is sodium carbonate; the concentration is 1.0 mol / L prepared with ammonia water and chitosan The complexing agent solution C of mol / L, wherein ammoniacal liquor and chitosan molar ratio are: ...

Embodiment 2

[0039] A method for preparing a spherical manganese-rich ternary precursor, comprising the following steps:

[0040] (1) Mix and dissolve nickel sulfate, cobalt sulfate and manganese sulfate with a molar ratio of 32:11:57 with deionized water to obtain a nickel-cobalt-manganese sulfate mixed solution A with a total metal ion concentration of 2.5mol / L;

[0041]A crystal nucleation control agent is also added in the nickel-cobalt-manganese sulfate mixed solution A, the total concentration of the crystal nucleation control agent is controlled at 1g / L, and the crystal nucleation control agent is polyvinyl alcohol;

[0042] (2) Precipitant solution B and complexing agent solution C are prepared with deionized water; the concentration of precipitant solution B is 1.5mol / L, and the precipitant is sodium carbonate; ammonium bicarbonate and urea are used to prepare a concentration of 2.5 The complexing agent solution of mol / L, wherein ammonium bicarbonate and urea molar ratio are: 2:3;...

Embodiment 3

[0047] A method for preparing a spherical manganese-rich ternary precursor, comprising the following steps:

[0048] (1) Mix and dissolve nickel sulfate, cobalt sulfate and manganese sulfate with a molar ratio of 25:10:65 with deionized water to obtain a nickel-cobalt-manganese sulfate mixed solution A with a total metal ion concentration of 1.5mol / L;

[0049] A crystal nucleation control agent is also added in the nickel-cobalt-manganese sulfate mixed solution A, the total concentration of the crystal nucleation control agent is controlled at 3g / L, and the crystal nucleation control agent is ethylenediaminetetraacetic acid;

[0050] (2) Precipitant solution B and complexing agent solution C were prepared with deionized water; the concentration of precipitant solution B was 2.0mol / L, and the precipitant was sodium carbonate; prepared with ammonia water and hexamethylenetetramine A complexing agent solution C with a concentration of 1.5mol / L, wherein the molar ratio of ammonia ...

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
Tap densityaaaaaaaaaa
Tap densityaaaaaaaaaa
Tap densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a sphere-like manganese-rich ternary precursor. The method comprises the following steps: mixing and dissolving nickel sulfate, cobalt sulfate and manganese sulfate to prepare a nickel-cobalt-manganese sulfate mixed solution, adding the nickel-cobalt-manganese sulfate mixed solution and a precipitant solution into a reaction kettle in a parallel flowmanner, adding a complexing agent in a parallel flow manner, controlling the pH value to be 6.8-10.0, the reaction temperature to be 40-80 DEG C and the stirring speed to be 200-800 r/min, and agingthe obtained turbid liquid in the reaction kettle for 5-20 hours after the solution is dropwise added; and after aging is finished, filtering and washing the turbid liquid, and finally, carrying out vacuum drying at 80 DEG C for 10-20 hours to obtain the sphere-like manganese-rich ternary precursor. The sphere-like manganese-rich ternary precursor prepared by the method is good in sphericity degree, narrow in particle size distribution, uniform in particle size, high in tap density, simple in process method and less in pollution.

Description

technical field [0001] The invention relates to the technical field of cathode materials for lithium ion batteries, in particular to a method for preparing a spherical manganese-rich ternary precursor. Background technique [0002] Lithium-ion batteries have the characteristics of high output voltage, high energy density, long cycle life, and no memory effect, and are widely used in electronic equipment, electric vehicles, energy storage batteries and other fields. In recent years, with the development of green industries such as new energy vehicles, the market demand for cathode materials for power lithium-ion batteries has gradually increased. At present, the anode materials of lithium-ion batteries mainly include lithium cobaltate, lithium manganate, lithium iron phosphate and nickel-cobalt-manganese ternary materials. However, the capacity of these lithium-ion battery cathode materials generally does not exceed 200mAh / g. In addition, cobalt and nickel are rare and preci...

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): C01G45/00C01G51/06C01G53/06H01M4/505H01M4/525H01M10/0525
CPCC01G53/06C01G51/06C01G45/00H01M4/505H01M4/525H01M10/0525C01P2004/32C01P2004/52C01P2004/61C01P2004/82C01P2006/12Y02E60/10
Inventor 李春流农艳莉李剑闫冠杰万维华李普良黄炳行明宪权
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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