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Simple and green method for preparing high-purity porous aluminum foil and application of method in sodium battery

A high-purity, aluminum foil technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of large environmental pollution and high production area requirements, and achieve the effect of simple and easy process, improved utilization rate, and accelerated volatilization

Pending Publication Date: 2022-07-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently reported porous aluminum is usually obtained by anodic electrolysis in an acidic solution, which causes great environmental pollution and requires high production areas

Method used

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  • Simple and green method for preparing high-purity porous aluminum foil and application of method in sodium battery
  • Simple and green method for preparing high-purity porous aluminum foil and application of method in sodium battery
  • Simple and green method for preparing high-purity porous aluminum foil and application of method in sodium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A simple and green method for preparing high-purity porous aluminum foil:

[0042] Configuration plating solution: 0.5M zinc sulfate + 0.1M ammonium sulfate + 0.01M cetyltrimethylammonium bromide

[0043] Place commercial aluminum foil in the plating solution at 0.5 mA cm -2 Electroplating for 5 hours at the current density of 100 °C, then put into a tube furnace, heated at 200 °C for 5 hours under a vacuum pressure of -0.1 MPa, and then heated to 500 °C for 10 hours. After cooling, high-purity porous aluminum foil can be obtained.

[0044] figure 1 It is the XRD pattern of the zinc-aluminum alloy in Example 1. The characteristic peaks of zinc and aluminum are observed, indicating that the metal zinc is successfully plated on the aluminum foil.

[0045] figure 2 This is the XRD pattern of the porous aluminum in Example 1. The characteristic peaks of aluminum are observed, and there are no other impurity peaks, indicating that the prepared porous aluminum has high pu...

Embodiment 2

[0048] A simple and green method for preparing high-purity porous aluminum foil:

[0049] Configuration plating solution: 0.5M zinc sulfate + 0.12M ammonium sulfate + 0.01M cetyltrimethylammonium bromide

[0050] Place commercial aluminum foil in the plating solution at 0.4 mA cm -2 Electroplating for 6 hours at a current density of 100%, then placed in a tube furnace, heated at 180 °C for 5 hours under a vacuum pressure of -0.12 MPa, and then heated to 500 °C for 10 hours. After cooling, high-purity porous aluminum foil can be obtained.

Embodiment 3

[0052] A simple and green method for preparing high-purity porous aluminum foil:

[0053] Configuration plating solution: 1.0M zinc sulfate + 0.15M ammonium sulfate + 0.014M cetyltrimethylammonium bromide

[0054] Place commercial aluminum foil in the plating solution at 0.2 mA cm -2Electroplating for 4 hours at the current density of 100%, then put into a tube furnace, heated at 200 °C for 5 hours under a vacuum pressure of -0.1MPa, and then heated to 480 °C for 9.5 hours at a vacuum pressure of -0.2MPa, after cooling, you can Obtain high-purity porous aluminum foil.

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Abstract

The invention belongs to the technical field of batteries, and particularly relates to a simple and environment-friendly method for preparing a high-purity porous aluminum foil and application of the high-purity porous aluminum foil in a sodium battery. The method comprises the following steps: electroplating a layer of metal zinc on the surface of an aluminum foil, and then carrying out heat treatment in a high-pressure environment to obtain the aluminum-zinc alloy. The porous aluminum foil can be prepared by combining electroplating and vacuum distillation technologies and controlling the pressure and temperature in the heat treatment process, the process is simple, easy to implement and environmentally friendly, in addition, evaporated metal zinc can be recycled, and the utilization rate of the material is further increased; the adopted two-step heat treatment method can effectively increase the porosity, during temperature reduction heat treatment, metal zinc on the surface layer is gradually diffused inwards to form a concentration gradient with the high surface layer zinc concentration and the low internal zinc concentration, during high-temperature heat treatment, the metal zinc on the surface layer is slowly evaporated to form a pore channel structure, and along with the proceeding of the volatilization process, the pore channel structure is formed. And the internal metal zinc can be volatilized along the porous structure, so that the generation of the uniform porous structure is further promoted.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a simple and green method for preparing high-purity porous aluminum foil and its application in sodium batteries. Background technique [0002] Na-ion batteries have attracted extensive attention due to their high safety, low cost, and the availability of aluminum foil for anode current collectors. With the rapid development of energy storage fields such as new energy vehicles, there is a huge demand for energy storage devices with high power density and high energy density. For the entire battery device, the current collector accounts for a large proportion. The energy density of the battery can be significantly improved by modifying the current collector. For sodium batteries, aluminum foil can be used for both positive and negative current collectors. In addition, designing a porous current collector can significantly improve the roughness of the current colle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/80H01M10/054
CPCH01M10/054H01M4/661H01M4/80
Inventor 冯金奎安永灵
Owner SHANDONG UNIV
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