Supercharge Your Innovation With Domain-Expert AI Agents!

Manufacturing method of lithium ion battery positive electrode material

A technology for lithium ion batteries and cathode materials, which is applied in the field of material synthesis, can solve the problems of uneven phase, wide particle size distribution, and poor phase structure stability of lithium manganese oxide products, and achieves easy industrial scale production, low price, The effect of reducing the high temperature capacity decay rate

Inactive Publication Date: 2004-12-22
KUNMING UNIV OF SCI & TECH
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is in order to overcome the deficiency of above-mentioned existing solid-phase synthesis method technology, on the basis of traditional high-temperature solid-phase synthesis method, has proposed mechanical activation---two-step solid-phase synthesis method, to solve solid-phase synthesis method The prepared lithium manganese oxide product has disadvantages such as inhomogeneous phase, poor phase structure stability, large grain size, and wide particle size distribution range; at the same time, it uses cheap and easy-to-obtain resources as raw materials to reduce production costs under the premise of ensuring material performance ; Choose a technical route with simple process flow and easy industrial production

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
  • Manufacturing method of lithium ion battery positive electrode material
  • Manufacturing method of lithium ion battery positive electrode material
  • Manufacturing method of lithium ion battery positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] LiOH and Mn(NO 3 ) 2 Weigh the ingredients according to the molar ratio of Li / Mn of 0.95:2, dry them in vacuum at 120°C for 8 hours after mixing, put them into an agate ball mill jar after cooling, and ball mill them on a planetary mushroom machine at a speed of 450r / min , perform mechanical activation treatment for 15 hours, then pretreatment at constant temperature at 450°C for 6 hours, ball mill activation for 30 minutes after cooling, and then synthesize at constant temperature at 700°C for 36 hours, and obtain spinel LiMn after natural cooling in the furnace 2 o 4 Cathode material. For the obtained spinel LiMn 2 o 4 X-ray diffraction analysis, scanning electron microscopy, and laser particle size analysis were carried out on the positive electrode material. The test results are shown in figure 2 , 3 , 4.

[0028] The electrochemical performance test of the material was assembled into a double-electrode simulated battery. Positive electrode according to LiM...

Embodiment 2

[0030] LiNO 3 and MnCO 3 Weigh the ingredients according to the molar ratio of Li / Mn of 1:2, dry in vacuum at 150°C for 6 hours after preparation, put it into an agate ball mill jar after cooling, and ball mill at a speed of 500r / min on a planetary mushroom machine , perform mechanical activation treatment for 18 hours, then pretreat at 450°C for 10 hours at a constant temperature, after cooling, ball milling for 1.5 hours, and then synthesize at a constant temperature at 800°C for 30 hours, and then naturally cool in the furnace to obtain spinel LiMn 2 o 4 Cathode material. For spinel LiMn 2 o 4 X-ray diffraction analysis, scanning electron microscopy, and laser particle size analysis were carried out on the positive electrode material. The test results are shown in Image 6 , 7 ,8.

[0031] The electrochemical performance test and assembly conditions are the same as in Example 1. The test results show that the first discharge specific capacity is 121.59mAh / g, and the...

Embodiment 3

[0033] Will Li 2 CO 3 and electrolytic MnO 2 Weigh the ingredients according to the molar ratio of Li / Mn of 1.03:2, add ethanol to the prepared mixture and ethanol according to the mass ratio of 100:15 to make a slurry, put it into the agate ball mill jar and put it on the planetary mushroom machine Ball mill at a rate of 600r / min, and perform mechanical activation treatment for 25 hours. After ball milling, put it into a vacuum drying oven to dry at 180°C to remove ethanol, and ball mill the dried material for 30 minutes to form a powder. Then pretreatment at constant temperature at 450°C for 12 hours, after cooling, ball milling and activation for 2 hours, then synthesis at constant temperature at 800°C for 24 hours, and spinel LiMn was obtained after natural cooling in the furnace. 2 o 4 Cathode material. For spinel LiMn 2 o 4 X-ray diffraction analysis, scanning electron microscopy, and laser particle size analysis were carried out on the positive electrode material....

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
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for manufacturing a lithium ion battery positive electrode material. The lithium salt and manganese salt are confected according to a mol rate; the confected materials are mechanically activated and mixed on a high speed ball grinder, then preprocess is carried at a low temperature, finally, they are baked at a high temperature; the spinel positive material can be acquired. The activation and the mixing guarantee the evenness of materials, reduces the synthesizing temperature, the crystal particle is small and even, the two-step synthesizing method can make the spinel amended and completed at low temperature, reduces the attenuation rate of capacity at high temperature. The process is simple, has no contamination, easy to be industrialized.

Description

1. Technical field: [0001] The invention relates to a method for manufacturing a positive electrode material of a lithium ion battery, belonging to the field of material synthesis. 2. Background technology: [0002] Lithium-ion batteries have developed rapidly since their commercialization in 1991. They are not only widely used in portable devices such as mobile phones, cameras, and notebook computers, but also listed as candidate power sources for electric vehicles, aerospace, military equipment, and energy storage devices. Lithium-ion battery cathode materials not only participate in electrochemical reactions as electrode materials, but also serve as a "reservoir" of lithium ions. Therefore, the research progress of cathode materials for lithium-ion batteries directly restricts the development of lithium-ion batteries. [0003] At present, the research hotspots of cathode materials for lithium-ion batteries mainly focus on three lithium-rich transition metal oxides lithiu...

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): C01D15/02C01G1/02C01G45/00H01M4/04H01M4/48H01M4/58
CPCY02E60/122H01M10/0525H01M4/505Y02E60/10
Inventor 戴永年杨斌姚耀春陈为亮刘大春杨部正刘永成旦义明吴昆华
Owner KUNMING UNIV OF SCI & 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