Porous aluminum foil for lithium ion battery current collector and preparation method and application thereof

A lithium-ion battery, ion battery technology, applied in battery electrodes, secondary batteries, electrode carriers/current collectors, etc., can solve the problems of high cost, slow speed, troublesome operation, etc., and achieve low cost, high efficiency, and short time. Effect

Active Publication Date: 2020-12-08
NANJING UNIV OF 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 porous aluminum foil for lithium ion battery current collector and its preparation method and application, using microwave technology to modify the metal aluminum foil to produce a honeycomb porous structure with uniform pore distribution, the surface of the aluminum foil after microwave is more Hydrophilic, which is beneficial to the coating of positive electrode materials, can be effectively applied to lithium-ion batteries. This method has the characteristics of short time, high efficiency, energy saving, low cost and simple operation process, and solves the problems of slow speed, Disadvantages such as troublesome operation and high cost

Method used

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  • Porous aluminum foil for lithium ion battery current collector and preparation method and application thereof
  • Porous aluminum foil for lithium ion battery current collector and preparation method and application thereof
  • Porous aluminum foil for lithium ion battery current collector and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Dissolve 0.1g of ferric nitrate in 10mL of deionized water and ultrasonically dissolve. Put aluminum foil with a mass of about 8mg into a 30*60mm porcelain boat. 1.5mL of 0.01g / mL ferric nitrate solution was dropped into the porcelain boat to immerse the aluminum foil. The submerged aluminum foil was subjected to microwave reaction for 30 s. The obtained product was observed in the SEM scanning image of the aluminum foil under the condition of 0.01g / mL ferric nitrate solution under the microwave for 30s, and the surface of the aluminum foil only partially had a porous structure, and the quality hardly changed.

Embodiment 2

[0042]Dissolve 0.5g of ferric nitrate in 10mL of deionized water and ultrasonically dissolve. Put aluminum foil with a mass of about 8mg into a 30*60mm porcelain boat. 1.5mL of 0.05g / mL ferric nitrate solution was dropped into the porcelain boat to immerse the aluminum foil. The submerged aluminum foil was subjected to microwave reaction for 30 s. The obtained product is observed in the SEM electron microscope scanning image under the condition of 0.05g / mL ferric nitrate solution, and there is a porous structure with uneven particle size on the surface of the aluminum foil microwaved for 30s, which is more porous than the surface of the aluminum foil obtained under the condition of 0.01g / mL ferric nitrate solution. Much porous structure, mass change is negligible.

Embodiment 3

[0044] Dissolve 1.0 g of ferric nitrate in 10 mL of deionized water, and ultrasonically dissolve. Put aluminum foil with a mass of about 8mg into a 30*60mm porcelain boat. 1.5mL of 0.1g / mL ferric nitrate solution was dropped into the porcelain boat to immerse the aluminum foil. The submerged aluminum foil was subjected to microwave reaction for 30 s. The obtained product was observed in the SEM electron microscope scanning image, and a honeycomb porous structure was evenly distributed on the surface of the aluminum foil under the condition of 0.1g / mL ferric nitrate solution under the microwave for 30s.

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Abstract

The invention discloses a porous aluminum foil for a lithium ion battery current collector and a preparation method and application of the porous aluminum foil, belongs to the technical field of preparation of the lithium ion battery current collector, and discloses a preparation method for quickly etching the porous aluminum foil on the lithium ion battery current collector by utilizing a microwave technology. The method comprises the following steps: dissolving metal salt in deionized water, paving a thin layer of commercial aluminum foil for microwave reaction, and accelerating the etchingspeed; and by increasing the microwave frequency, obtaining the porous aluminum foil with the honeycomb porous structure uniformly distributed. The preparation method has the advantages of short consumed time, low energy consumption, controllable reaction, simple operation and the like, and can be applied to lithium ion batteries and energy storage. The surface of the aluminum foil after microwavetreatment is more hydrophilic, coating of a cathode material is facilitated, and the aluminum foil can be effectively applied to lithium ion batteries.

Description

technical field [0001] The invention relates to a preparation method of a porous aluminum foil used in a lithium-ion battery collector, and belongs to the technical field of preparation of a lithium-ion battery collector. Background technique [0002] The rapid consumption of fossil fuels and the destruction of the environment promote clean, safe and sustainable energy, so the focus of research has shifted to clean energy, including energy harvesting and conversion, storage, management and efficient use. Among all energy storage systems, lithium-ion batteries (LIBs) are favored due to their low reduction potential (3.04 V vs SHE) and high mass capacity (3850 mA h g -1 ), becoming an irreplaceable power source for portable electronic products and automobiles. For most commercial lithium-ion batteries, the current collector of the negative electrode is generally 12 μm thick Cu foil, and the current collector of the positive electrode is generally 20 μm thick Al foil. Battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/80H01M4/66H01M4/139H01M10/0525C23F1/14
CPCH01M4/661H01M4/80H01M4/139H01M10/0525C23F1/14Y02E60/10
Inventor 朱纪欣丁莹张桥王雪友
Owner NANJING UNIV OF TECH
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