Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of positive electrode material of high rate lithium ion battery and preparation method thereof

A technology of positive electrode materials and composite materials, which is applied to the positive electrode materials of high-rate and high-capacity secondary batteries, the positive electrode materials of lithium cobalt oxide coated with metal-organic graphene composite materials and its preparation fields, which can solve the problems that cannot meet the power type and long-term requirements. Long-life batteries, obstacles to the development of energy storage technologies such as lithium-ion batteries, clean energy utilization, low rate difference, etc., to achieve the effect of improving the performance of lithium-ion batteries, excellent high-rate charge and discharge performance, and good battery dynamics performance

Active Publication Date: 2020-01-10
SHENZHEN CARKU TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the poor low rate of current lithium-ion batteries, the current rate level of lithium-ion battery technology in the international market generally only reaches 3C (20 minutes of discharge), which cannot meet the needs of power-type and long-life batteries, and seriously hinders the development of lithium-ion batteries. Development of energy storage technology and utilization of clean energy

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 kind of positive electrode material of high rate lithium ion battery and preparation method thereof
  • A kind of positive electrode material of high rate lithium ion battery and preparation method thereof
  • A kind of positive electrode material of high rate lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 0.2g aluminum nitrate Al(NO 3 ) 3 9H 2 O, 0.05g of terephthalic acid, 0.5g of lithium cobaltate and 0.025g of graphene were placed in a ball mill jar, 0.2mL of ethanol was added, and ball milled for 12 hours to obtain product 1, which was placed in a tube furnace at 600°C Calcined for 6 hours, the product 2 was obtained, and the product 2 was placed in a ball mill jar for ball milling for 6 hours, and the obtained powder was the metal-organic graphene composite-coated lithium cobaltate cathode material. figure 1 is the scanning electron microscope image of the material, figure 2 is the powder diffraction pattern of the material;

[0028] The metal-organic graphene / lithium cobaltate composite cathode material obtained in Example 1 is used as the working electrode of lithium ion battery, and the metal-organic graphene composite is coated with lithium cobaltate cathode material and Super-P, binding agent (PVDF) Mix evenly in N,N-dimethylpyrrolidone (NMP) solution, the...

Embodiment 2

[0031] 0.2g aluminum nitrate Al(NO 3 ) 3 9H 2 O, 0.05g of terephthalic acid, 0.5g of lithium cobaltate and 0.025g of graphene were placed in a ball mill jar, 0.2mL of ethanol was added, and ball milled for 12 hours to obtain product 1, which was placed in a tube furnace at 600°C Calcined for 6 hours, the product 2 was obtained, and the product 2 was placed in a ball mill jar for ball milling for 5 hours, and the obtained powder was the metal-organic graphene composite-coated lithium cobaltate cathode material. The metal-organic graphene / lithium cobaltate composite cathode material obtained in Example 1 is used as the working electrode of lithium ion battery, and the metal-organic graphene composite is coated with lithium cobaltate cathode material and Super-P, binding agent (PVDF) Mix evenly in N,N-dimethylpyrrolidone (NMP) solution, the mass ratio is 85:10:5, then coat and press on the aluminum foil, bake at 85°C for 10h under normal pressure, and then bake at 120°C under v...

Embodiment 3

[0033] 0.2g aluminum nitrate Al(NO 3 ) 3 9H 2 O, 0.05g of terephthalic acid, 0.375g of lithium cobaltate and 0.025g of graphene are placed in a ball mill jar, add 0.2mL of ethanol, and ball mill for 12 hours to obtain product 1, which is placed in a tube furnace at 600°C Calcined for 8 hours, the product 2 was obtained, and the product 2 was placed in a ball mill jar for ball milling for 6 hours, and the obtained powder was the metal-organic graphene composite-coated lithium cobalt oxide positive electrode material. figure 1 is the scanning electron microscope image of the material, figure 2 is the powder diffraction pattern of the material;

[0034] The metal-organic graphene / lithium cobaltate composite cathode material obtained in Example 3 is used as the working electrode of lithium ion battery, and the metal-organic graphene composite is coated with lithium cobaltate cathode material and Super-P, binding agent (PVDF) Mix evenly in N,N-dimethylpyrrolidone (NMP) solutio...

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

Belonging to the electrode material field and the electrochemical energy storage field, the invention discloses a high rate performance lithium ion battery cathode material and a preparation method thereof, in particular to a cathode material with lithium cobaltate coated by a metal organic graphene composite material and a preparation method thereof, as well as a cathode material serving as a high rate and high capacity secondary battery. The cathode material is formed by coating lithium cobaltate coated with a metal organic graphene composite material, and is prepared by ball-milling of metal nitrate, an organic carboxylic acid ligand, lithium cobaltate and grapheme, calcination and secondary ball-milling. The reversible capacity of the cathode material under 3-4.5V is above 185mAh / g (0.5C), and the reversible capacity under 15C is above 140mAh / g.

Description

technical field [0001] The present invention relates to a lithium ion battery positive electrode material with high rate performance and a preparation method thereof, in particular to a metal organic graphene composite material-coated lithium cobaltate positive electrode material and a preparation method thereof, and as a high rate high capacity secondary battery The cathode material belongs to the field of electrode materials and the field of electrochemical energy storage. Background technique [0002] Since SONY adopted lithium cobalt oxide, which can intercalate lithium, as the positive electrode material in 1990, it has become the focus of research and development of power supply materials around the world. Lithium-ion batteries have high operating voltage, large specific energy, small self-discharge, long cycle life, and light weight. , no memory effect, less environmental pollution and so on. Lithium-ion batteries have been widely used in the power supply of various ...

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): H01M4/525H01M4/62H01M4/1391H01M4/139
CPCY02E60/10
Inventor 雷云
Owner SHENZHEN CARKU TECH