Aluminum foil used for lithium ion battery, microporous aluminum foil and preparation method thereof

A lithium-ion battery and aluminum foil technology, which is applied in the manufacture of electrodes, battery electrodes, chemical electrodes, etc., can solve the problems of reducing the contact resistance of aluminum oxide foil and reducing the mechanical strength of aluminum foil, so as to improve the activity of lithium ions, elongation, and resistance. The effect of rate increase

Inactive 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

Method used

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  • Aluminum foil used for lithium ion battery, microporous aluminum foil and preparation method thereof
  • Aluminum foil used for lithium ion battery, microporous aluminum foil and preparation method thereof
  • Aluminum foil used for lithium ion battery, microporous aluminum foil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An aluminum foil for a lithium ion battery, comprising: comprising: 0.16wt% 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: 0.16wt% 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 2000-6000 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: 0.18wt% 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 lithium batteries, comprising: 0.18wt% 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, a...

Embodiment 3

[0058] An aluminum foil for a lithium ion battery, comprising: comprising: 0.17wt% 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 lithium batteries, comprising: 0.17wt% 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 is distributed with 500-1000 through holes and blind holes with a diameter of 6-12 μm per square centimeter, and 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 100-10...

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Abstract

The invention discloses an aluminum foil used for a lithium ion battery, a microporous aluminum foil and a preparation method thereof. The aluminum foil comprises 0.16-0.18wt% of Mg, less than or equal to 0.08wt% of Si, less than or equal to 0.2wt% of Fe, less than or equal to 0.03wt% of Ga, less than or equal to 0.04wt% of Cu, less than or equal to 0.04wt% of Zn, less than or equal to 0.05wt% ofV, less than or equal to 0.03wt% of Ti, and 99.7wt% of aluminum; the microporous aluminum foil is prepared by adopting a chemical corrosion method; 300-6,000 through holes and/or blind holes with thediameters of 6-12[mu]m are distributed in each square centimeter of the microporous aluminum foil; compared with limited component composition and the existing series aluminum alloy, the aluminum foildisclosed in the invention has higher yield strength; in the subsequent chemical corrosion process, the formed micropore hole diameters are smaller and more uniform; and the through holes and the blind holes and the material body are in circular arc transition, so that stress concentration can be lowered, mechanical property can be reinforced, and electrical performance is not weakened. The aluminum foil can be used for 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
CPCH01M4/049H01M4/661H01M4/80Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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