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

Spherical-like porous nickel-cobalt-manganese precursor and preparation method thereof

A porous nickel and precursor technology, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve problems such as non-renewable resources of fossil energy and environmental problems

Inactive Publication Date: 2021-08-06
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of economy and society, human society has an increasing demand for energy, but traditional fossil energy is a non-renewable resource, and the extensive use of fossil energy has also led to serious environmental problems

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
  • Spherical-like porous nickel-cobalt-manganese precursor and preparation method thereof
  • Spherical-like porous nickel-cobalt-manganese precursor and preparation method thereof
  • Spherical-like porous nickel-cobalt-manganese precursor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The present invention also provides the nickel-cobalt-manganese precursor described in the above technical solution and its preparation method: comprising the following steps:

[0028] (1) Put the mixed solution of nickel-cobalt-manganese, lye, and complexing agent under a protective atmosphere, and flow them into the reactor equipped with the bottom liquid to carry out the co-precipitation reaction for 3 to 24 h; the above-mentioned bottom liquid is hydroxide A mixed solution of sodium solution and ammonia water. And control the concentration of ammonia water in the bottom liquid to be 8-12 g / L;

[0029] (2) After the reaction is over, continue to age at a low stirring speed for 1 to 10 hours. After aging, the obtained nickel-cobalt-manganese precursor solution was repeatedly vacuum-filtered, washed with deionized water for 3 to 5 times, and finally air-dried at 80°C to 120°C for 10 to 30 hours to obtain the Spherical nickel cobalt manganese precursor. Wherein, the ...

Embodiment 1

[0046] According to the molar ratio of 0.8:0.1:0.1, a certain mass of nickel sulfate, cobalt sulfate, and manganese sulfate was weighed and dissolved in deionized water to prepare a metal salt solution A with a total concentration of nickel, cobalt, and manganese ions of 2 mol / L.

[0047] A certain mass of sodium hydroxide was weighed and dissolved in deionized water to prepare a sodium hydroxide precipitant solution B with a concentration of 4 mol / L.

[0048] Add deionized water to a certain volume of concentrated ammonia water to prepare dilute ammonia solution C with a concentration of 2.8 mol / L.

[0049] Add deionized water to a certain volume of concentrated ammonia water, dilute it into 1.5 L ammonia solution, and add it to a 5 L continuous co-precipitation reaction tank (CSTR) as the bottom liquid.

[0050] And stir at a certain speed, and heat the reactor to 55°C in a water bath. After the reaction temperature stabilized, a certain amount of 4 mol / L sodium hydroxide p...

Embodiment 2

[0054] According to the molar ratio of 0.6:0.2:0.2, a certain mass of nickel sulfate, cobalt sulfate, and manganese sulfate was weighed and dissolved in deionized water to prepare a metal salt solution A with a total concentration of nickel, cobalt, and manganese ions of 2 mol / L.

[0055] A certain mass of sodium hydroxide was weighed and dissolved in deionized water to prepare a sodium hydroxide precipitant solution B with a concentration of 4 mol / L.

[0056] Add deionized water to a certain volume of concentrated ammonia water to prepare dilute ammonia solution C with a concentration of 2.8 mol / L.

[0057] Add deionized water to a certain volume of concentrated ammonia water, dilute it into 1.5 L ammonia solution, and add it to a 5 L continuous co-precipitation reaction tank (CSTR) as the bottom liquid.

[0058] And stir at a certain speed, and heat the reactor to 55°C in a water bath. After the reaction temperature stabilized, a certain amount of 4 mol / L sodium hydroxide p...

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
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a spherical-like porous nickel-cobalt-manganese precursor and a preparation method thereof. The precursor is hydroxide of nickel, cobalt and manganese, the molecular formula of the precursor is NixCoyMn1-x-y(OH)2, x is more than 0 and less than 1, and y is more than 0 and less than 1. Primary particles of the sphere-like porous nickel-cobalt-manganese precursor are in a hexagonal sheet shape, the thickness ranges from 10 nm to 100 nm, the side length ranges from 10 nm to 1 [mu]m, the particle size of secondary particles ranges from 3 [mu]m to 20 [mu]m, and the pore diameter ranges from 2 nm to 10 nm. The sphere-like porous nickel-cobalt-manganese precursor obtained by the preparation process is regular in morphology and high in tap density, and particularly, the porous structure is beneficial to promoting diffusion of lithium salt in the high-temperature calcination process and improving the distribution uniformity of elements. A lithium transition metal layered oxide positive electrode material prepared from the spherical-like porous nickel-cobalt-manganese precursor provided by the invention has relatively high electrochemical capacity and relatively excellent cycling stability.

Description

technical field [0001] The invention relates to the field of cathode materials for lithium-ion batteries, in particular to a quasi-spherical porous nickel-cobalt-manganese precursor and a preparation method thereof. Background technique [0002] With the continuous development of economy and society, human society has an increasing demand for energy, but traditional fossil energy is a non-renewable resource, and the extensive use of fossil energy has also led to serious environmental problems. Therefore, for the sustainable development of human society, we urgently need to find clean and renewable resources to provide inexhaustible power for the development of human society. Due to its high specific capacity, good cycle stability, and high safety, lithium-ion batteries are widely used in various electronic devices and electric vehicles, and are also widely used in large-scale energy storage systems and other fields. Therefore, the development of nickel-cobalt-manganese prec...

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 Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525B82Y40/00
CPCC01G53/006H01M4/505H01M4/525H01M10/0525B82Y40/00H01M2004/021H01M2004/028C01P2004/32C01P2004/22C01P2004/24C01P2006/16C01P2004/61Y02E60/10
Inventor 陈召勇刘俊朱华丽周灿凯别晓非胡进
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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