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

Preparation method of spherical lithium nickel cobalt manganese oxide precursor mixture

A technology of nickel cobalt lithium manganate and mixture, applied in the field of battery materials, can solve the problems of poor rate performance and cycle performance, difficult to control composition and morphology, low tap density, etc., achieve good economic benefits and improve the quality of electrode sheets , the effect of preventing oxidation

Inactive Publication Date: 2016-03-02
DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the first Coulombic efficiency is low, the rate performance and cycle performance are poor, the composition and morphology are difficult to control, and the tap density is low, etc.

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 spherical lithium nickel cobalt manganese oxide precursor mixture
  • Preparation method of spherical lithium nickel cobalt manganese oxide precursor mixture
  • Preparation method of spherical lithium nickel cobalt manganese oxide precursor mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of secondary spherical nickel cobalt lithium manganate precursor mixture, comprising the following steps:

[0031] (1) Raw material pretreatment: Weigh NiSO according to the molar ratio of nickel, cobalt and manganese elements of 5:2:3 4 ·6H 2 O. CoSO 4 ·7H 2 O and MnSO 4 ·H 2 0, then add ascorbic acid, its addition is 0.05% of the total mass of nickel salt, cobalt salt and manganese salt, at normal temperature, add deionized water and mix to obtain mixed solution 3L, wherein the solid content of the slurry is 60%;

[0032] (2) Wet synthesis: add the nickel salt, cobalt salt and manganese salt pretreated in step (1) into the reactor, and add an appropriate amount of 0.5mol / L ammonia and 1mol / LNaOH solution to carry out wet synthesis to obtain For the initial slurry, the reaction temperature in the reactor is 50°C, the pH of the solution is 11, and the stirring speed is 700rpm;

[0033] (3) Post-reaction aging: keep stirring for 5 hours, stop s...

Embodiment 2

[0036] (1) Raw material pretreatment: Weigh NiSO according to the molar ratio of nickel, cobalt and manganese elements of 5:2:3 4 ·6H 2 O. CoSO 4 ·7H 2 O and MnSO 4 ·H 2 0, then add ascorbic acid, its addition is 0.03% of the total mass of nickel salt, manganese salt and cobalt salt, at normal temperature, add deionized water and mix to obtain mixed solution 3L, wherein the solid content of the slurry is 50%;

[0037] (2) Wet synthesis: add the nickel salt, cobalt salt and manganese salt pretreated in step (1) into the reactor, and add an appropriate amount of 1.0mol / L ammonia water and 2mol / L NaOH solution to carry out wet synthesis The initial slurry was obtained. At this time, the reaction temperature in the reactor was 60° C., the pH of the solution was 11.5, and the stirring speed was 800 rpm;

[0038](3) Aging after the reaction: keep stirring for 6 hours, stop stirring, ventilate, stand and age for 18 hours, and then filter and wash to obtain the nano-spherical nic...

Embodiment 3

[0041] (1) Raw material pretreatment: Weigh NiSO according to the molar ratio of nickel, cobalt and manganese elements of 5:2:3 4 ·6H 2 O. CoSO 4 ·7H 2 O and MnSO 4 ·H 2 0, then add glucose, its addition is 0.04% of the total mass of nickel salt, manganese salt and cobalt salt, add deionized water at room temperature and mix uniformly to obtain 3L of mixed solution, wherein the solid content of the slurry is 40%;

[0042] (2) Wet synthesis: add the nickel salt, cobalt salt and manganese salt pretreated in step (1) into the reactor, and add an appropriate amount of 1.5mol / L ammonia water and 3mol / LNaOH solution to carry out wet synthesis to obtain For the initial slurry, the reaction temperature in the reactor is 70°C, the pH of the solution is 12, and the stirring speed is 900rpm;

[0043] (3) Aging after reaction: keep stirring for 7 hours, stop stirring, ventilate, stand and age for 17 hours, and then filter and wash to obtain the nano-spherical nickel-cobalt-manganese ...

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 belongs to the technical field of lithium battery material and discloses a preparation method of a spherical lithium nickel cobalt manganese oxide precursor mixture. The preparation method comprises raw material pretreatment, wet synthesis, aging after reaction, and spray pyrolysis secondary granulation. The prepared product is the micron-scale secondary spherical lithium nickel cobalt manganese oxide precursor mixture comprising a plurality of nano spherical particles. The precursor mixture has the medium particle diameter of 9-13[mu]m, the iron conductivity of 20-100 [mu]S / cm and the tap density not less than 2.00g / cm<3>. The preparation method has the advantages of small investment, reliable technology, low running cost and the like and therefore has excellent economic benefit and market popularization value.

Description

technical field [0001] The invention belongs to the technical field of battery materials, and relates to a preparation method of a nickel-cobalt lithium manganate precursor mixture, in particular to a preparation method of a secondary spherical nickel-cobalt lithium manganese oxide precursor mixture. Background technique [0002] Lithium-ion power battery is currently recognized as the most potential vehicle battery at home and abroad. It is mainly composed of positive electrode materials, negative electrode materials, separators, electrolytes, etc. Among them, positive electrode materials are an important part of lithium-ion batteries and also determine the quality of lithium-ion batteries. Therefore, in terms of resources, environmental protection and safety performance, finding the ideal electrode active material for lithium-ion batteries is still the primary problem to be solved by international energy materials workers. [0003] At present, the positive electrode materi...

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): H01M4/50H01M4/52H01M4/62H01M4/36H01M10/0525
CPCH01M4/362H01M4/50H01M4/52H01M4/62H01M10/0525Y02E60/10
Inventor 李华成李普良陈南雄王春飞胡明超卢道焕唐跃波黄瑞鸿李林辉
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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