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

Method for preparing lithium iron phosphate precursor comprehensively from laterite type nickel ores

A technology of lithium iron phosphate and laterite nickel ore, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., to achieve simple process flow, low cost, and good product quality

Inactive Publication Date: 2009-11-11
CENT SOUTH UNIV
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no reports on the comprehensive utilization of laterite nickel ore to prepare lithium iron phosphate precursors for lithium-ion battery cathode materials

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 preparing lithium iron phosphate precursor comprehensively from laterite type nickel ores
  • Method for preparing lithium iron phosphate precursor comprehensively from laterite type nickel ores
  • Method for preparing lithium iron phosphate precursor comprehensively from laterite type nickel ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 500 grams of laterite nickel ore are leached with hydrochloric acid, so that the concentration of Fe in the leach solution is 0.5mol / L, adding sodium peroxide solution (1mol / L) in the solution, then adding phosphoric acid (1mol / L) equimolar with Fe, Use polyacrylic acid (0.01mol / L) to control the morphology, adjust pH=2.5±0.1 with sodium hydroxide solution (0.5mol / L), react in a stirred reactor at 40°C for 5min, wash and filter the resulting precipitate, and Dry at 100°C to obtain the precursor of lithium iron phosphate, the anode material of lithium ion battery, the mixture of iron phosphate and doped phosphate. The following table is the molar ratio of each element in the precursor of this embodiment.

[0030]

Embodiment 2

[0032] 500 grams of laterite nickel ore are leached with sulfuric acid, so that the concentration of Fe in the leach solution is 0.01mol / L, sodium hypochlorite solution (3mol / L) is added in the solution, and then triammonium phosphate solution (0.1mol / L) is added with Fe equimolar ), use citric acid (0.5mol / L) to control the morphology, adjust pH=2.5±0.1 with lithium hydroxide solution (2mol / L), react in a stirred reactor at 60°C for 24h, wash and filter the resulting precipitate, Dry at 50°C to obtain the precursor of lithium iron phosphate, the anode material of the lithium ion battery, the mixture of iron phosphate and doped phosphate.

Embodiment 3

[0034] 500 grams of laterite nickel ore are leached with hydrochloric acid and sulfuric acid mixed, so that the concentration of Fe in the leach solution is 2mol / L, potassium chlorate solution (0.01mol / L) is added in the solution, and then the ammonium dihydrogen phosphate solution ( 9mol / L), control the morphology with tetraethylethylene glycol (0.01mol / L), adjust the pH=3.0±0.1 with ammonia water (0.01mol / L), react in a stirred reactor at 20°C for 10h, and prepare the obtained The precipitate is washed, filtered, and dried at 200°C to obtain a mixture of iron phosphate and doped phosphate, which is the precursor of lithium iron phosphate, the positive electrode material of lithium ion batteries.

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 preparing a lithium iron phosphate precursor comprehensively from laterite type nickel ores, which comprises: using an acid to fully leach out the laterite type nickel ores, and driving the Fe concentration in lixivium to between 0.01 and 6 mol / L; adding 0.01 to 9 mol / L oxidant and precipitator into the lixivium, using 0.01 to 6 mol / L of complexant or surfactant to control the appearance, and using 0.01 to 6 mol / L of aqueous alkali to control the pH value of the system to between 0.1 and 3; and performing reaction on the system in a stirring reactor at the temperature of between 20 and 90 DEG C for 5 minutes to 24 hours, washing and filtering the obtained deposit, drying the obtained product at the temperature of between 50 and 200 DEG C, and obtaining the precursor of a lithium iron phosphate anode material of a lithium ion battery. The invention has the characteristics of wide source of raw materials, simple technological process, good product quality, stability, low cost and the like, is particularly suitable for providing high-quality iron sources for large-scale production of the lithium iron phosphate anode materials of the lithium ion batteries, and simultaneously comprehensively utilizes laterite type nickel ore resources.

Description

technical field [0001] The invention relates to a preparation method of a lithium iron phosphate precursor for a positive electrode material of a lithium ion battery, in particular to a method for comprehensively utilizing laterite nickel ore to prepare a lithium iron phosphate precursor for a positive electrode material of a lithium ion battery. technical background [0002] Lithium iron phosphate with an olivine structure has become one of the most promising cathode materials for lithium-ion batteries due to its high theoretical specific capacity (170mAh / g), good cycle performance, good thermal stability, low price, and environmental friendliness. . However, as the main raw material for the production of lithium iron phosphate-iron salt, the large-scale industrial production of lithium iron phosphate is seriously restricted due to shortcomings such as unstable product quality, low density, and low purity. [0003] At present, most of the iron sources for preparing lithium...

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): C01B25/45H01M4/58
CPCY02E60/12Y02E60/10
Inventor 李新海李灵均王志兴伍凌方杰郭华军胡启阳张云河彭文杰李金辉
Owner CENT SOUTH UNIV
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