Supercharge Your Innovation With Domain-Expert AI Agents!

A method for stabilizing mixed materials in the preparation process of lithium iron phosphate materials

A preparation process, lithium iron phosphate technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of segregation of mixed raw materials, affecting the mixing uniformity of raw materials, high density, etc. The effect of pulp scrap

Active Publication Date: 2020-04-24
ZHEJIANG RICHPOWER TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the iron red (ferric oxide) raw material used in the iron red process route, due to its high density, the slurry after liquid phase mixing and sand mill dispersion is prone to iron red sedimentation, which affects the mixing uniformity of the raw material, resulting in the mixing of raw materials. Segregation occurs in
The segregation in the mixed raw material will lead to the deterioration of the electrochemical performance of the lithium iron phosphate material produced by subsequent processing

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
  • A method for stabilizing mixed materials in the preparation process of lithium iron phosphate materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for stabilizing mixed materials during the preparation of lithium iron phosphate materials, comprising the following steps:

[0023] (1) Weigh lithium hydroxide, ferric oxide and phosphoric acid according to the stoichiometric ratio Li:Fe:P=1:1:1. Take by weighing carbon source by ferric oxide: carbon source=1:0.05 weight ratio, wherein carbon source uses carbon black.

[0024] (2) Add 60 parts of deionized water in the mixing tank, then add 40 parts of lithium hydroxide, ferric oxide, phosphoric acid and carbon source weighed according to the proportion of step (1);

[0025] (3) Stir the materials such as lithium oxide, ferric oxide, phosphoric acid and carbon source in the stirring tank for 1.5h under the speed condition of the linear speed of 8m / s;

[0026] (4) After completing step 3, add guar gum and xanthan gum in the mixing tank (the ratio of guar gum and xanthan gum is 1:1, and the addition amount is that both guar gum and xanthan gum are 0.4% of the ...

Embodiment 2

[0030] A method for stabilizing mixed materials during the preparation of lithium iron phosphate materials, comprising the following steps:

[0031] (1) Weigh lithium hydroxide, ferric oxide and phosphoric acid according to the stoichiometric ratio Li:Fe:P=1:0.98:1. The carbon source is weighed in the weight ratio of ferric oxide: carbon source=1:0.1, wherein the carbon source uses glucose.

[0032] (2) Add 65 parts of deionized water in the mixing tank, then add 35 parts of lithium hydroxide, ferric oxide, phosphoric acid and carbon source weighed according to the proportion of step (1);

[0033] (3) Stir the materials such as lithium oxide, ferric oxide, phosphoric acid and carbon source in the mixing tank for 1 hour at a speed condition of a cutter head type stirring paddle at a linear speed of 9 m / s;

[0034] (4) After completing step 3, add guar gum and xanthan gum in the mixing tank (the ratio of guar gum and xanthan gum is 1:1, and the addition amount is that both guar...

Embodiment 3

[0038] A method for stabilizing mixed materials during the preparation of lithium iron phosphate materials, comprising the following steps:

[0039] (1) Lithium hydroxide, ferric oxide and phosphoric acid were weighed according to the stoichiometric ratio Li:Fe:P=1:0.99:0.99. The carbon source is weighed in the weight ratio of ferric oxide: carbon source=1:0.08, wherein the carbon source uses sucrose.

[0040] (2) Add 70 parts of deionized water in the mixing tank, then add 30 parts of lithium hydroxide, ferric oxide, phosphoric acid and carbon source weighed according to the proportion of step (1);

[0041] (3) Stir the materials such as lithium oxide, ferric oxide, phosphoric acid and carbon source in the stirring tank for 1 hour under the speed condition of the linear velocity of 10m / s with the cutterhead type stirring paddle;

[0042] (4) After completing step 3, add guar gum and xanthan gum (the ratio of guar gum and xanthan gum is 2:1, and the amount of addition is that...

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 stabilization method of mixed material during a preparation process of a lithium iron phosphate material. The method comprises the following steps: 1) weighing lithium hydroxide, ferric oxide and phosphoric acid; weighing a carbon source according to the weight ratio of ferric oxide to carbon source being 1(0.05-0.1); 2) adding 60-70 weight parts of deionized water in anagitator tank, and then adding 30-40 weight parts of lithium hydroxide, ferric oxide, phosphoric acid and the carbon source weighed according to the proportion in the step 1); 3) stirring lithium oxide, ferric oxide, phosphoric acid and the carbon source for 1-2 h; 4) adding guar gum and xanthan gum in the agitator tank; 5) dumping the slurry in a sand milling machine for grinding; and 6) after the step 5), obtaining a stable lithium iron phosphate raw material slurry. The stabilization method has the characteristics of convenient mixing, good usage effect, and good uniformity.

Description

technical field [0001] The invention belongs to the technical field of preparation of cathode materials for lithium ion batteries, and in particular relates to a method for stabilizing mixed materials in the preparation process of lithium iron phosphate materials. Background technique [0002] Since its successful development, lithium-ion batteries have been widely used in 3C digital products, electric bicycles, electric vehicles, communication base stations, and energy storage power stations due to their high energy density, high voltage platform, wide temperature adaptability, and long cycle life. field. For lithium iron phosphate batteries, there are more and more applications in the fields of power batteries such as electric bicycles and electric vehicles, and energy storage batteries such as communication base stations and energy storage power stations. [0003] The preparation of lithium iron phosphate materials can be divided into iron red process route, iron phospha...

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): H01M4/58H01M10/0525
CPCH01M4/5825H01M10/0525Y02E60/10
Inventor 于文志周慧芳郑金龙金巧玲
Owner ZHEJIANG RICHPOWER TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com