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Lithium ion anode material and a preparation method thereof

A positive electrode material, lithium-ion technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of low battery yield, high cost, and poor product consistency, and achieve high battery yield, low cost, and good promotion prospects Effect

Inactive Publication Date: 2012-06-27
李浩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Commonly used cathode materials for lithium-ion batteries include lithium manganate, lithium iron phosphate, lithium nickel-cobalt manganese oxide, etc. At present, lithium iron phosphate is generally selected as the cathode material for lithium-ion batteries in China, but there are high costs and product failures in the process of use. A series of problems such as poor consistency and low battery yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Positive electrode active material: particle size ≤0.5μm lithium iron phosphate 80%

[0014] Conductive agent: graphite or carbon black 5%

[0015] Binder: PTFE 6%

[0016] Solvent: dimethylamide, its weight is 80% of the total weight of positive electrode active material, conductive agent and binder.

[0017] The preparation method is as follows: (1) put the required positive electrode active material and conductive agent into a ball mill and mix for 1 to 3 hours to make positive electrode powder; (2) put the binder into the mixer and add the required solvent , heating and stirring at a temperature of 40-70°C to dissolve the binder, then adding the above-mentioned positive electrode material and stirring for 1-3 hours to make a positive electrode slurry; (3) Coating the above-mentioned prepared slurry with Machine coated on aluminum foil or aluminum mesh, the thickness of the coating is 75 μm ~ 180 μm, dry at 100 ~ 130 ° C for 10-20 minutes, and then press with a fil...

Embodiment 2

[0019] Positive electrode active material: particle size ≤0.5μm lithium iron phosphate 80~90%

[0020] Conductive agent: graphite or carbon black 5~15%

[0021] Adhesive: PTFE 5~10%

[0022] Solvent: Dimethylamide Its weight is 70~90% of the total weight of the above three substances.

[0023] Its preparation method is with embodiment 1.

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Abstract

The invention relates to a lithium ion anode material and a preparation method thereof. The lithium ion anode material comprises the following materials in part by weight: anode active substance: 80-90% of lithium iron phosphate with grain size not more than 0.5 micron, conductive agent: 5-15% of graphite or carbon black, and adhesive: 5-10% of polyfluortetraethylene. The lithium ion anode material and the preparation method thereof are low in cost, high in battery yield, simple in manufacture craft, and good in popularization prospects.

Description

technical field [0001] The invention relates to a manufacturing technology of a battery material, in particular to a lithium ion cathode material and a preparation method thereof. Background technique [0002] Commonly used cathode materials for lithium-ion batteries include lithium manganate, lithium iron phosphate, lithium nickel-cobalt manganese oxide, etc. At present, lithium iron phosphate is generally selected as the cathode material for lithium-ion batteries in China, but there are high costs and product failures in the process of use. A series of problems such as poor consistency and low battery yield. Contents of the invention [0003] The object of the present invention is to provide a lithium ion positive electrode material with low cost, high battery yield and simple manufacturing process and a preparation method thereof. [0004] The technical solution adopted by the present invention to solve the technical problem is: a lithium ion positive electrode materia...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/58
CPCY02E60/12Y02E60/10
Inventor 李浩李庆福
Owner 李浩
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