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

Preparing method for composite phosphate series lithium ion battery anode material

A lithium-ion battery and composite phosphate technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of poor performance of the positive electrode material of mono- or multi-component composite phosphate lithium-ion batteries, and uneven mixing of precipitants and salt solutions. , different thickness of precipitated particles, etc., to achieve the effect of good cycle performance, good consistency and good batch performance

Inactive Publication Date: 2015-12-30
WUXI JIABANG ELECTRIC POWER PIPE FACTORY
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the method described in this application, uneven mixing of the precipitating agent and the salt solution and uneven thickness of the precipitated particles are likely to occur, which is not conducive to obtaining a precursor with a stable composition ratio, uniform particle size distribution, and good consistency, and ultimately leads to the synthesis of mono- or Poor performance of cathode materials for multi-component composite phosphate lithium-ion batteries

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]Prepare a mixed solution of ferrous sulfate, cobalt sulfate and manganese sulfate, the total concentration is 2.0 mol / liter, the molar ratio of the three is 5:4:1, add 2 moles of sulfuric acid and 80 grams of urea per liter of solution, add a precipitant The molar ratio of oxalic acid to total metal ions is 1.1:1. Stir to dissolve the solids to make the system into a solution. Heat the solution through the heating mantle to control the reaction time. With the decomposition of urea, the hydrogen ions in the solution are consumed, and the pH value of the solution gradually increases. , the solubility of the precipitate gradually decreased and precipitated. The temperature in the reactor is 120°C, the reaction is stirred for 14 hours, filtered and washed until the sulfate radical in the washing water cannot be detected with barium chloride, and dried to obtain Mn 0.1 co 0.4 Fe 0.5 C 2 o 4 2H 2 O Ternary precursor. The precursor was added stoichiometric ratio of ammoni...

Embodiment 2

[0026] Prepare manganese sulfate, ferrous sulfate, nickel sulfate, cobalt sulfate mixed aqueous solution, wherein the total concentration of manganese sulfate, ferrous sulfate, nickel sulfate, cobalt sulfate is 0.1 mol / liter, and the mol ratio of the four is 1:1:1: 1. Add 0.1 mole of hydrochloric acid and 40 grams of urea per liter of solution, add the precipitant oxalic acid to the total metal ion molar ratio of 0.8:1, stir and dissolve the solid to make the system into a solution, heat the solution through the heating mantle, control the reaction time, and With the decomposition of urea, the hydrogen ions in the solution are consumed, the pH value of the solution increases gradually, and the solubility of the precipitate gradually decreases and precipitates. The temperature inside the reactor was controlled to be 150°C. The reaction was stirred for 10 hours, filtered and washed until the sulfate radical in the washing water could not be detected with barium chloride, and dri...

Embodiment 3

[0028] Prepare manganese sulfate, ferrous sulfate, nickel sulfate, cobalt sulfate mixed aqueous solution, wherein the total concentration of manganese sulfate, ferrous sulfate, nickel sulfate, cobalt sulfate is 3 mol / liter, and the mol ratio of four is 1:1:1: 1. Add 5 moles of hydrochloric acid and 300 grams of urea per liter of solution, add the precipitant oxalic acid to the total metal ion molar ratio of 1.5:1, stir and dissolve the solid to make the system into a solution, heat the solution through the heating mantle, control the reaction time, and With the decomposition of urea, the hydrogen ions in the solution are consumed, the pH value of the solution increases gradually, and the solubility of the precipitate gradually decreases and precipitates. The temperature in the reactor was controlled to be 100°C. The reaction was stirred for 30 hours, filtered and washed until the sulfate group in the washing water could not be detected with barium chloride, and dried to obtain...

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
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparing method for a composite phosphate series lithium ion battery anode material. Soluble ferrous salt and soluble transition metallic nickel salt or cobalt salt or manganese salt are prepared into a solution, and acid and urea are added to prepare a mixed solution; a precipitating agent is added into the mixed solution for reaction to prepare a composite oxalate precursor; the precursor, a lithium source and a phosphorus source are uniformly mixed in a ball milled mode, and the composite phosphate series lithium ion battery anode material is prepared under inertia or weak reducing atmosphere. According to the method, the urea water solution is used and will be hydrolyzed slowly under the acid and urea enzyme catalysis or heating conditions, and as the urea hydrolysis speed is low and a hydrolysis product is simple and easy to volatilize, the urea water solution can be used for uniform precipitation of elements and ions. The first-time charge-discharge specific capacity of 0.1C multiplying power of the obtained product at the room temperature can reach about 160 mAh / g, and cycle performance and charge-discharge performance are good.

Description

technical field [0001] The invention relates to a preparation method of a composite phosphate series lithium ion battery cathode material which is doped with metal ions by a co-precipitation method, and belongs to the technical field of material preparation. Background technique [0002] In recent years, the research and development of lithium-ion batteries have made gratifying achievements, especially the improvement of the performance of the negative electrode and the development of the electrolyte system have achieved great results, but the research on the cathode materials of lithium-ion batteries appears to be relatively lagging behind, which has become a constraint for lithium-ion batteries. The bottleneck of battery market and application expansion. Lithium cobalt oxide, lithium nickel oxide, lithium nickel cobalt composite oxide, lithium manganese oxide, lithium vanadate and other positive electrode materials have always been a hot spot in the field of positive elect...

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): H01M4/58H01M10/0525
CPCH01M4/5825H01M10/0525Y02E60/10
Inventor 徐德生
Owner WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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