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Aluminum foil and micro-pore aluminum foil for lithium-ion battery and preparation method of micro-pore aluminum foil

A lithium-ion battery and aluminum foil technology, which is applied in electrode manufacturing, battery electrodes, electrochemical treatment of electrodes, etc., can solve the problems of reducing the contact resistance of alumina foil, reducing the mechanical strength of aluminum foil, etc., so as to improve lithium ion activity and elongation. , the effect of increasing resistivity

Active Publication Date: 2018-06-15
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, and the mechanical strength of the aluminum foil is reduced during the corrosion removal process

Method used

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  • Aluminum foil and micro-pore aluminum foil for lithium-ion battery and preparation method of micro-pore aluminum foil
  • Aluminum foil and micro-pore aluminum foil for lithium-ion battery and preparation method of micro-pore aluminum foil
  • Aluminum foil and micro-pore aluminum foil for lithium-ion battery and preparation method of micro-pore aluminum foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An aluminum foil for a lithium ion battery, comprising: comprising: 0.08wt% of Mg, 0.08wt% of Si, 0.2wt% of Fe, 0.03wt% of Ga, 0.04wt% of Cu, 0.04wt% of Zn, 0.05wt% % V, 0.03wt% Ti, 99.7wt% aluminum, and the rest are impurities; its resistivity is 3μΩ•m. The aluminum foil is prepared into a microporous aluminum foil through the method for preparing a microporous aluminum foil for a lithium battery.

[0028] A microporous aluminum foil for a lithium battery, comprising: 0.08wt% of Mg, 0.08wt% of Si, 0.2wt% of Fe, 0.03wt% of Ga, 0.04wt% of Cu, 0.04wt% of Zn, 0.05wt% V, 0.03wt% of Ti, 99.7wt% of aluminum, and the rest are impurities.

[0029] The microporous aluminum foil is distributed with 4000-6000 through holes and blind holes with a diameter of 6-12 μm per square centimeter, and the proportion of through holes is 55%; the upper and lower surfaces of the microporous aluminum foil are distributed with multiple nicks , the notch is 1-3 μm deep, 1-5 μm wide, and 100-100...

Embodiment 2

[0047] An aluminum foil for a lithium ion battery, comprising: comprising: 0.1wt% of Mg, 0.05wt% of Si, 0.1wt% of Fe, 0.02wt% of Ga, 0.03wt% of Cu, 0.03wt% of Zn, 0.04wt% % V, 0.01wt% Ti, and 99.7wt% aluminum, and the rest are impurities; its resistivity is 2.5μΩ•m. The aluminum foil is prepared into a microporous aluminum foil through the method for preparing a microporous aluminum foil for a lithium battery.

[0048] A microporous aluminum foil for a lithium battery, comprising: 0.1wt% of Mg, 0.05wt% of Si, 0.1wt% of Fe, 0.02wt% of Ga, 0.03wt% of Cu, 0.03wt% of Zn, 0.04wt% V, 0.01wt% of Ti, 99.7wt% of aluminum, and the rest are impurities.

[0049] The microporous aluminum foil is distributed with 300-2000 through holes and blind holes with a diameter of 6-12 μm per square centimeter, of which the proportion of through holes is 60%; the upper and lower surfaces of the microporous aluminum foil are distributed with multiple nicks , the notch is 1-3 μm deep, 1-5 μm wide, and...

Embodiment 3

[0058] An aluminum foil for a lithium ion battery, comprising: 0.09wt% of Mg, 0.07wt% of Si, 0.05wt% of Fe, 0.01wt% of Ga, 0.03wt% of Cu, 0.02wt% of Zn, 0.02wt% % V, 0.02wt% Ti, 99.7wt% aluminum, and the rest are impurities; its resistivity is 2μΩ•m. The aluminum foil is prepared into a microporous aluminum foil through the method for preparing a microporous aluminum foil for a lithium battery.

[0059] A microporous aluminum foil for a lithium battery, comprising: 0.09wt% of Mg, 0.07wt% of Si, 0.05wt% of Fe, 0.01wt% of Ga, 0.03wt% of Cu, 0.02wt% of Zn, 0.02wt% V, 0.02wt% of Ti, 99.7wt% of aluminum, and the rest are impurities.

[0060] The microporous aluminum foil has 500-3000 through holes and blind holes with a diameter of 6-12 μm per square centimeter, of which the proportion of through holes is 70%; the upper and lower surfaces of the microporous aluminum foil are distributed with multiple nicks , the notch is 1-3 μm deep, 1-5 μm wide, and 100-1000 μm long, the through...

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Abstract

The invention discloses aluminum foil and micro-pore aluminum foil for a lithium-ion battery and a preparation method of the micro-pore aluminum foil. The aluminum foil comprises the following components in percentages by weight: 0.08-0.1wt% of Mg, not more than 0.08wt% of Si, not more than 0.2wt% of Fe, not more than 0.03wt% of Ga, not more than 0.04wt% of Cu, not more than 0.04wt% of Zn, not more than 0.05wt% of V, not more than 0.03wt% of Ti and 99.7wt% of aluminum. The micro-pore aluminum foil is prepared by adopting a chemical corrosion method; and 300-6,000 through holes and / or blind holes of which the diameters are 6-12 microns are distributed in each square centimeter of micro-pore aluminum foil. Compared with existing series of aluminum alloys, limited components have higher yieldstrength and the apertures of formed micro-pores are smaller and more uniform in the subsequent chemical corrosion process; the through holes, the blind holes and a material body are in arc transition, so that stress concentration is reduced, the mechanical property is strengthened and the electric property is not reduced; and the aluminum foil can be applied to the lithium battery.

Description

technical field [0001] The invention belongs to the technical field of lithium battery material manufacturing, and in particular relates to an aluminum foil for a lithium ion battery, a microporous aluminum foil and a preparation method of the microporous aluminum foil. 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-...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/66H01M4/80
CPCH01M4/0438H01M4/661H01M4/80Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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