Method for regulating and controlling crystal face orientation of metal material, metal material obtained through method and application of metal material

A technology of metal material and crystal plane orientation, applied in structural parts, electrolytic components, circuits, etc., can solve the problems of growth rate difference, unfavorable metal uniform deposition and peeling, etc., and achieve the effect of eliminating zinc dendrites and improving electrode activity

Active Publication Date: 2022-05-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different crystal plane orientations have different reactivity, which means that the metal is affected by the crystal plane during the deposition and stripping process, and its growth rate will be significantly different, which is not conducive to the uniform deposition and stripping of the metal.

Method used

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  • Method for regulating and controlling crystal face orientation of metal material, metal material obtained through method and application of metal material
  • Method for regulating and controlling crystal face orientation of metal material, metal material obtained through method and application of metal material
  • Method for regulating and controlling crystal face orientation of metal material, metal material obtained through method and application of metal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. The commercial copper foil substrate of 30 microns (thickness) is rolled 5 times under a pressure of 200 MPa using a roller press. The speed of the roller is 0.5m / s, and then the stress-introduced copper foil is annealed at 150°C, 300°C and 450°C for 4h, the heating rate is 5°C / min, and 5% H 2 and 95% Ar atmosphere. Driven by the residual thermal stress, the commercialized copper foil was successfully transformed into a copper foil with only a single (100) crystal plane orientation. This experimental phenomenon has been successfully proved by XRD test, and it is the first time that this kind of metal substrate that undergoes a single crystal plane orientation transition at a low temperature (relative to the melting point of copper, 1073°C) has been discovered. figure 1 It is the XRD spectrum of the copper foil annealed at different temperatures in this embodiment. It can be seen that with the increase of the annealing temperature, the copper foil gradually transform...

Embodiment 2

[0057] 1. A commercial zinc foil substrate with a thickness of 30 microns is first rolled 5 times under a pressure of 200 MPa using a pair of rollers. The speed of the roller is 0.5m / s, and then the surface oxide layer is removed by simple chemical polishing using dilute sulfuric acid, and the annealing atmosphere is Ar / H 2 In a mixed atmosphere, the heating rate was 10°C / min, and the annealing was performed at 415°C for 12 hours to obtain a 0002 zinc foil with a single preferred crystal plane orientation. Figure 8 In this example, the XRD patterns of the commercialized zinc foil and the fully preferred single crystal plane orientation zinc foil indicate that the single crystal plane orientation Zn foil was successfully obtained at 415°C.

[0058] 2. The Zn||Zn symmetric battery assembled with fully preferred single-crystal plane orientation zinc foil and commercial zinc foil was tested for cycle life, and the electrolyte used was 2mol ZnSO 4 , glass fiber as a separator, as...

Embodiment 3

[0060] 1. The commercial Ni foil with a thickness of 30 microns was first rolled 5 times with a roller press, and the pressure and speed were 500MPa and 0.4m / s, respectively. After annealing, use dilute sulfuric acid to remove the oxide layer on the metal surface. Then anneal at 1000°C for 4h, the annealing atmosphere is Ar / H 2 Mixed atmosphere, the heating rate is 10°C / min. The corresponding crystal orientation changes were investigated. Figure 10 is the XRD pattern of the corresponding Ni foil, indicating that after annealing at 1000 ° C, the exposed crystal plane will change significantly, and it is found that the Ni foil after stress annealing has a high degree of preference (90%) in the (200) crystal plane orientation.

[0061] 2. The untreated commercial nickel foil and the Ni(200) preferred crystal plane orientation nickel foil prepared by stress annealing at 1000°C were subjected to LSV test in 3mol KCl aqueous solution. The test was to use Pt as the counter electro...

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Abstract

The invention relates to a method for regulating and controlling the crystal face orientation of a metal material, the metal material obtained through the method and application, and the method comprises the following two steps that the crystal face orientation of the metal material is regulated and controlled through introduction of residual stress and low-temperature annealing, preferred even single crystal face orientation is obtained, and the crystal face orientation of the metal material is regulated and controlled. The method is used for regulating and controlling the electrochemical electron-ion exchange process of a metal material to obtain a high-activity and high-uniformity metal interface, and is successfully applied to the fields of battery metal negative electrode materials, metal negative electrode current collector materials and electro-catalysis.

Description

Technical field: [0001] The invention belongs to the technical field of methods for regulating and controlling the crystal plane orientation of metal materials, and in particular relates to a method for regulating and controlling the crystal plane orientation of metal materials, the obtained materials, and the application in the field of electrochemistry. Background technique: [0002] Metal materials are widely used in the field of energy materials. Due to their high theoretical specific capacity and working voltage, secondary metal batteries have also been widely developed in recent years. The (alloyed anode) ion process faces problems such as dendrite growth, structural expansion, and low reactivity, so its development has been severely restricted. Metal materials are used as electrode materials for catalytic reactions such as HER and carbon dioxide reduction, because the low catalytic activity leads to high overpotential, which makes the catalytic efficiency low and hind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C21D1/74C21D8/00C22F1/02C22F1/04C22F1/08C22F1/10C22F1/14C22F1/16C25B11/075H01M4/134H01M4/38
CPCC21D8/00C21D1/26C21D1/74C22F1/165C22F1/10C22F1/04C22F1/08C22F1/14C22F1/02C25B11/075H01M4/38H01M4/134
Inventor 王海燕谢春霖杨泽芳唐有根张旗姬慧敏
Owner CENT SOUTH UNIV
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