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Lithium cell anode active substance, anode dressing and its preparing method

A positive active material and lithium battery technology, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve the problems of complex process, unstable product performance, high cost, etc., and achieve high platform capacity, enhanced conductivity, and uniform grinding high effect

Inactive Publication Date: 2007-11-14
SHENZHEN B&K TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a lithium battery positive electrode active material, a positive electrode dressing and a preparation method thereof. By using ternary materials, lithium cobaltate and a specific preparation process, the complex process existing in the production of the existing lithium battery positive electrode materials is solved. , high cost, unstable product performance and other defects

Method used

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  • Lithium cell anode active substance, anode dressing and its preparing method
  • Lithium cell anode active substance, anode dressing and its preparing method
  • Lithium cell anode active substance, anode dressing and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] With the component ratio of ternary material: lithium cobalt oxide with a specific gravity of 5:5, ball mill according to the following steps:

[0041] 1) Add the ternary material, lithium cobaltate and graphite conductive agent into the ball milling tank, and perform ball milling at a speed of 1000-1500r / min, and the milling time is 4 hours. The diameters of the zirconium balls used for ball milling are 3mm, 6.5mm, 10mm, 15mm, and 20mm, respectively, and are placed in the ball mill jar according to the number ratio of 2:3:3:4:4.

[0042] 2) After the first step is completed, let it stand still for 30 minutes, add carbon black conductive agent into the ball mill jar, and then ball mill it at a speed of 1000r / min for 2 hours. Let stand for 1 hour.

[0043] Chemical mixing process:

[0044] 1) Add the colloids continuously and slowly to the mixed materials, and complete the feeding within half an hour, then thicken the mixture for 2 hours. After thickening, the speed of...

Embodiment 2

[0048] With the ternary material: Lithium Cobalt Oxide proportion ratio of 6:4, follow the steps below for ball milling:

[0049] 1): Add the ternary material, lithium cobaltate and graphite conductive agent into the ball milling tank, and conduct ball milling at a speed of 1000-1500r / min, and the milling time is 4 hours. The diameters of the zirconium balls used for ball milling are 3mm, 6.5mm, 10mm, 15mm, and 20mm, respectively, and are placed in the ball mill jar according to the number ratio of 2:3:3:4:4.

[0050] 2): After the first step is completed, let it stand still for 30 minutes, add carbon black conductive agent into the ball mill jar, and then ball mill it at a speed of 1000r / min for 2 hours. Let stand for 1 hour.

[0051] Chemical mixing process:

[0052] 1): Add the mixed materials slowly and continuously to the colloid, and complete the feeding within half an hour, and then stir for 2 hours. After the thick stirring, the speed of the mixer is 3600r / min.

[005...

Embodiment 3

[0056] With the ternary material: lithium cobaltate proportion ratio of 7:3, follow the steps below for ball milling:

[0057] 1) Add the ternary material, lithium cobaltate and graphite conductive agent into the ball milling tank, and perform ball milling at a speed of 1000-1500r / min, and the milling time is 4 hours. The diameters of the zirconium balls used for ball milling are 3mm, 6.5mm, 10mm, 15mm, and 20mm, respectively, and are placed in the ball mill jar according to the number ratio of 2:3:3:4:4.

[0058] 2) After the first step is completed, let it stand still for 30 minutes, add carbon black conductive agent into the ball mill jar, and then ball mill it at a speed of 1000r / min for 2 hours. Let stand for 1 hour.

[0059] Chemical mixing process:

[0060] 1) Add the colloids continuously and slowly to the mixed materials, and complete the feeding within half an hour, then thicken the mixture for 2 hours. After thickening, the speed of the mixer is 3600r / min.

[006...

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Abstract

The invention is a lithium battery anode active matter, and anode dressing and the preparing method thereof. And the anode active matter comprises trinary material LiNixCoyMn1-x-yO2 and lithium cobaltate; the anode dressing comprises anode active matter, graphite conductive agent, charcoal black conductive agent, and adhesive; and the preparing method comprises: 1. ball-milling: a. ball-milling the trinary material, lithium cobaltate and graphite conductive agent in proportion; b. after a, adding the charcoal black conductive agent into ball-mill tank in proportion; and blending: a. taking the adhesive in proportion and blending with organic solvent, and when blending until no bubbles, stilling and serving; b. adding mixed material and other additives to colloid and blending thickly; and c. filtering for coating.

Description

technical field [0001] The invention relates to a method for making a positive electrode of a lithium battery, and mainly refers to a positive electrode active material of a lithium battery, a positive electrode dressing and a preparation method thereof. Background technique [0002] Lithium battery is a high-performance secondary battery, which has the advantages of high working voltage, high volume and energy density, long service life, low self-discharge rate, etc. It is widely used in various digital products, power tools and other fields. In recent years, the application range of lithium batteries has become more and more extensive, and the end-use products have different requirements for them. Therefore, the positive electrode materials used in lithium batteries have also changed from simple lithium cobalt oxide to physical or chemical methods of various positive electrode materials. Doping, including lithium manganese oxide and lithium cobalt oxide doping, nickel-cont...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/48H01M4/62H01M4/04H01M4/505H01M4/525
CPCY02E60/10
Inventor 阳海鹰江岩曹建华蓝俊方
Owner SHENZHEN B&K TECH
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