Lithium battery positive electrode, and preparation method and application thereof

A lithium battery and positive electrode technology, applied in the field of lithium battery positive electrode and its preparation, can solve the problems of reducing the contact resistance of aluminum oxide foil, reducing the mechanical strength of aluminum foil, etc., and achieve the effects of preventing lithium dendrites, easy promotion, and high smoothness

Inactive Publication Date: 2018-03-06
산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contact resistance of the obtained aluminum oxide foil is not significantly reduced, ...

Method used

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  • Lithium battery positive electrode, and preparation method and application thereof
  • Lithium battery positive electrode, and preparation method and application thereof
  • Lithium battery positive electrode, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A positive electrode of a lithium battery, comprising: a positive electrode collector 1, a binder, a positive electrode powder, and conductive carbon black, at least one side of the electrode collector is coated with a composite layer 2 composed of the binder, the positive electrode powder, and conductive carbon black , the positive electrode powder is either a ternary material, or lithium iron phosphate, or lithium cobalt oxide; the through holes 3 and / or blind holes 4 are composed of binder, positive electrode powder and conductive carbon black The composite layer is the same as that of the prior art.

[0028] The positive current collector is a microporous aluminum foil, and each square centimeter of the microporous aluminum foil is distributed with 1000-1500 through holes with a diameter of 10-50 μm and / or 1000-3000 blind holes with a diameter of 10-50 μm. Holes; the through holes and / or blind holes are coated with a mixture of positive electrode powder and binder, ...

Embodiment 2

[0049] A positive electrode of a lithium battery, comprising: a positive electrode collector, a binder, a positive electrode powder, and conductive carbon black, at least one side of the electrode collector is coated with a composite layer of the binder, the positive electrode powder, and conductive carbon black, and the The positive electrode powder is either a ternary material, or lithium iron phosphate, or lithium cobalt oxide; there is a composite layer of binder, positive electrode powder and conductive carbon black in the through holes and / or blind holes.

[0050] The positive current collector is a microporous aluminum foil made of battery aluminum foil, and the battery microporous aluminum foil has 1000-1500 through holes with a diameter of 10-15 μm and 1000-3000 through holes with a diameter of 10-15 μm per square centimeter. For blind holes with uneven sizes of 10-50μm, each through hole and blind hole is irregular in shape, and the junction of each hole and the surfa...

Embodiment 3

[0060] A lithium battery positive electrode, comprising: a positive electrode collector, a binder, a positive electrode powder, and conductive carbon black, at least one side of the electrode collector is coated with a composite layer of the binder, the positive electrode powder, and conductive carbon black, the The positive electrode powder is either a ternary material, or lithium iron phosphate, or lithium cobalt oxide; there is a composite layer of binder, positive electrode powder and conductive carbon black in the through holes and / or blind holes.

[0061]The positive current collector is a microporous aluminum foil, the material of which is a battery microporous aluminum foil, and the battery microporous aluminum foil has 1000-1500 through holes with a diameter of 10-15 μm and 1000-3000 holes per square centimeter. Blind holes with a diameter of 10-50 μm, each through hole and blind hole are irregular in shape, and the junction of each hole and the surface of the aluminum...

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PUM

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Abstract

The invention belongs to a lithium battery positive electrode, and a preparation method and the application thereof, and belongs to the technical field of manufacturing of a lithium battery. Accordingto the lithium battery positive electrode, and the preparation method and application thereof, the defects in the prior art are overcome. The invention aims to provide the lithium battery positive electrode, and the preparation method and application thereof. According to the scheme, the lithium battery positive electrode comprises a positive electrode current collector, an adhesive, a positive electrode powder and conductive carbon black, and is characterized in that at least one surface of the positive electrode current collector is coated with a composite layer formed by the adhesive, thepositive electrode powder and the conductive carbon black; the positive electrode powder is a ternary material or lithium iron phosphate or lithium cobaltate; the positive electrode current collectoris a microporous aluminum foil; 1000 to 1500 through holes with the diameter of 10 to 50 um and/or 1000 to 3000 blind holes with the diameter of 10 to 50 um are distributed in per centimeter of the microporous aluminum foil; the lithium battery positive electrode can be applied to the lithium battery.

Description

technical field [0001] The invention belongs to a positive electrode of a lithium battery, a preparation method and application thereof, and belongs to the technical field of lithium battery manufacturing. Background technique [0002] New materials and clean energy are both key development directions at the national level. Lithium-ion batteries are currently the most widely used energy storage cells in energy storage technology. Improving the energy storage density of cells is the goal pursued by the world. The energy density of cells is The improvement mainly depends on the development and progress of its positive and negative electrode materials, but it is also related to the progress of the positive and negative electrode current collectors, positive and negative electrode binders, electrolytes and separators of lithium-ion batteries. [0003] The current collector used in the positive electrode of lithium-ion batteries is generally composed of aluminum foil and the posi...

Claims

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Application Information

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IPC IPC(8): H01M4/74H01M4/131H01M4/136H01M10/0525C23F1/02
CPCC23F1/02H01M4/131H01M4/136H01M4/742H01M10/0525Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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