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A kind of preparation method and application of porous metal electrode with biomimetic structure

A porous metal and electrode technology, applied in the field of electrochemistry and biomimetic materials, can solve the problems of limited specific surface area and excessive pore size, and achieve the effects of simple preparation method, low environmental pollution and excellent performance.

Active Publication Date: 2021-06-25
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such porous metals have disadvantages such as limited specific surface area and large pore size.

Method used

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  • A kind of preparation method and application of porous metal electrode with biomimetic structure
  • A kind of preparation method and application of porous metal electrode with biomimetic structure
  • A kind of preparation method and application of porous metal electrode with biomimetic structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1 As shown, copper acetate hydrate was dissolved in ammonia solution to prepare a solution containing 2mol / L of copper ions.

[0031] Then put a piece of degreased cotton cloth into the solution, take out the cotton cloth after fully soaking, arrange the cotton in an air atmosphere and heat it to 300 degrees Celsius and keep it for 180 minutes for pre-calcination.

[0032] The precalcined sample was heated to 300 degrees Celsius under a hydrogen atmosphere and kept for 180 minutes for reduction treatment to obtain porous metal copper.

[0033] like figure 2 As shown, the metal copper salt is decomposed to form copper oxide after being calcined in air, and the template is removed, and the copper oxide is reduced in hydrogen to obtain metallic copper.

[0034] like image 3 As shown, the metal copper products prepared by the cotton template method maintain the morphology of the braided structure similar to the cotton raw materials.

Embodiment 2

[0036] Dissolve nickel acetate hydrate in ammonia solution to prepare a solution containing 2.5 mol / L of nickel ions.

[0037] Then put a piece of degreased cotton cloth into the solution, take out the cotton cloth after fully soaking, place the cotton in an air atmosphere and heat it to 800 degrees Celsius and keep it for 60 minutes for pre-calcination.

[0038] The pre-calcined sample was heated to 1000 degrees Celsius under a hydrogen atmosphere and kept for 60 minutes for reduction treatment to obtain porous metal nickel.

Embodiment 3

[0040] Dissolve cobalt acetate hydrate in ammonia solution to prepare a solution containing 5 mol / L of cobalt ions.

[0041] Then put a piece of degreased cotton cloth into the solution, take out the cotton cloth after fully soaking, place the cotton in an air atmosphere and heat it to 600 degrees Celsius and keep it for 60 minutes for pre-calcination.

[0042] The pre-calcined sample was heated to 600 degrees Celsius under a hydrogen atmosphere and kept for 60 minutes for reduction treatment to obtain porous metal cobalt.

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Abstract

The invention discloses a preparation method and application of a porous metal electrode with a bionic structure. The preparation process is as follows: dissolving transition metal salts in ammonia solution to prepare a certain concentration of metal salt ammonia solution; soaking biomass fibers into the above-mentioned In the metal salt ammonia solution, take it out after fully immersing, and then place it in air or oxygen atmosphere for pre-calcination at 300-800°C to obtain a porous oxide structure; place the above-mentioned oxide porous structure in a reducing atmosphere at 300-1000°C for After reduction heat treatment, a porous metal electrode with a biomimetic structure is obtained. The present invention uses the biomass fiber with bionic structure as a template, soaks and absorbs the metal salt raw material, removes the template and reduces it by calcination, and can directly prepare a three-dimensional porous metal or alloy with a structure similar to that of the biomass raw material, and the preparation method is simple and convenient. The process cost is low, and it can be applied to lithium metal current collectors and catalytic electrodes for water electrolysis.

Description

technical field [0001] The invention belongs to the field of electrochemical and bionic materials, relates to a porous metal electrode, in particular to a preparation method and application of a porous metal electrode with a bionic structure. Background technique [0002] With the increasingly serious worldwide problems such as environmental pollution and energy shortage, there is an urgent need to develop new energy and efficient energy storage and utilization technologies. The development of electrochemical energy conversion, electrochemical energy storage and utilization technology provides the possibility to realize efficient conversion, utilization and storage of new energy. Electrochemical energy conversion and energy storage are inseparable from the preparation and structural design of electrode materials. Porous metal electrodes, such as nickel, copper and alloys, are widely used as electrode collectors for lithium batteries, catalytic electrodes for electrolyzing w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/13H01M4/139H01M4/66
CPCH01M4/13H01M4/139H01M4/665Y02E60/10
Inventor 朱春宇饶中浩朱瑞杰盛楠
Owner CHINA UNIV OF MINING & TECH