Method for preparing lithium manganate anode material

A positive electrode material, lithium manganese oxide technology, applied in battery electrodes, electrical components, circuits, etc., can solve problems such as uneven particle size of products, uneven heating of raw materials, and limited phase purity, so as to shorten the production cycle and improve products. The quality and product particles are uniform and consistent

Inactive Publication Date: 2012-07-04
IRICO
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently used to prepare LiMn 2 o 4 The method is mainly the traditional solid-phase method, which is simple and quick, but uneven mixing, uneven heating of raw materials, uneven product particle size, limited phase purity, and huge power consumption, high cost and high energy consumption, product performance poor

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 manganate anode material
  • Method for preparing lithium manganate anode material
  • Method for preparing lithium manganate anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Add lithium carbonate, manganese dioxide, and magnesium carbonate into deionized water according to the molar ratio of Li:Mn:Mg=0.6:1.1:0.015, stir and mix evenly.

[0019] 2) The obtained mixed solution is sprayed and pyrolyzed by a spray dryer to obtain a lithium manganate precursor powder in which the materials are evenly mixed.

[0020] 3) The obtained precursor powder is placed in a microwave sintering furnace, heated at 3kW for 7h, and then kept at 900W for 6h to obtain lithium manganate with good crystallinity and uniform phase.

[0021] 4) The lithium manganate sample obtained above was washed with pure water, filtered three times, dried at 140° C., and then passed through a 200-mesh sieve to obtain a lithium manganate cathode material with good quality.

[0022] The present invention passes through the XRD figure of the sample of above-mentioned embodiment 1 as figure 1 As shown, the phase is very pure, the crystallinity is also very good, and its morpholog...

Embodiment 2

[0024] 1) Add lithium carbonate, manganese dioxide, and magnesium carbonate into deionized water according to the molar ratio of Li:Mn:Mg=0.5:1:0.01, stir, and mix evenly.

[0025] 2) The obtained mixed solution is sprayed and pyrolyzed by a spray dryer to obtain a lithium manganate precursor powder in which the materials are evenly mixed.

[0026] 3) The obtained precursor powder is placed in a microwave sintering furnace, heated at 2kW for 8h, and then maintained at 800W for 8h, and lithium manganate with good crystallinity and uniform phase is obtained.

[0027] 4) The obtained lithium manganate sample was washed with pure water, filtered three times, dried at 130° C., and then passed through a 200-mesh sieve to obtain a lithium manganate cathode material with good quality.

Embodiment 3

[0029] 1) Add lithium carbonate, manganese dioxide, and magnesium carbonate into deionized water according to the molar ratio of Li:Mn:Mg=0.65:1.2:0.02, stir and mix evenly.

[0030] 2) The obtained mixed solution is sprayed and pyrolyzed by a spray dryer to obtain a lithium manganate precursor powder in which the materials are evenly mixed.

[0031] 3) The obtained precursor powder is placed in a microwave sintering furnace, heated at 4kW for 6h, and then kept at 1000W for 5h, to obtain lithium manganate with good crystallinity and uniform phase.

[0032] 4) The lithium manganate sample obtained above was washed with pure water, filtered three times, dried at 150° C., and then passed through a 200-mesh sieve to obtain a lithium manganate cathode material with good quality.

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 relates to a method for preparing lithium battery anode material, in particular to a method for preparing lithium manganate anode material. The method is characterized by comprising the following steps of: (1) adding soluble lithium salt, manganic compound and doping agent into deionized water for stirring according to a mol ratio of (0.5-0.65):(1-1.2):(0.01-0.02); (2) spraying pyrolyzing the obtained mixed liquid according to a spraying dryer; (3) placing the mixed liquid into a microwave sintering furnace, heating for 6-8 hours under 2-4kW, and keeping for 5-8 hours under 800-1000W so as to obtain lithium manganate; and (4) washing by pure water and filtering for at least three times, drying under 130-150 DEG C, and screening by a 200-mesh sieve so as to obtain the lithium manganate anode material. According to the method, the material is directly heated through microwave sintering, so that the material is evenly heated, and the particles are uniform; the crystallinity is better; the product quality is improved; and the method is good for preparing lithium manganate with stable performance.

Description

technical field [0001] The invention relates to the preparation of lithium battery cathode materials, in particular to a preparation method of lithium manganate cathode materials. Background technique [0002] In lithium-ion batteries, the cathode material is the most important component and the key to determining the performance of lithium-ion batteries. Spinel LiMn 2 o 4 It is one of the lithium-ion electrode materials that have been widely concerned in recent years. It is different from the current commercial cathode material LiCoO 2 Compared with the advantages of rich resources, low price, non-toxic and non-polluting, the main structure of spinel lithium manganese oxide is composed of regular cubic close-packed oxygen ions, and lithium ions and manganese ions occupy tetrahedrons and octahedrons respectively. In the gap, its simplest formula is LiMn 2 o 4 , with a space group of Fd3m (No.227), lithium ions are distributed in the three-dimensional channels around the...

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): H01M4/505
CPCY02E60/122Y02E60/10
Inventor 王少卿
Owner IRICO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap