A self-supporting three-dimensional nano-graded porous high-entropy alloy electrolyzed water material and its preparation method

A three-dimensional nano, high-entropy alloy technology, applied in the direction of electrolysis components, electrolysis process, electrodes, etc., can solve the problems affecting the number, stability and conductivity of catalyst active sites, and achieve simple and controllable processing temperature, low price, The effect of reducing production costs

Active Publication Date: 2021-07-16
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most transition metal catalysts are currently in powder state and need to be coated on a conductive substrate with a binder, which will seriously affect the number of active sites, stability and conductivity of the catalyst.

Method used

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  • A self-supporting three-dimensional nano-graded porous high-entropy alloy electrolyzed water material and its preparation method
  • A self-supporting three-dimensional nano-graded porous high-entropy alloy electrolyzed water material and its preparation method
  • A self-supporting three-dimensional nano-graded porous high-entropy alloy electrolyzed water material and its preparation method

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preparation example Construction

[0027] A method for preparing a flexible nanoporous metal oxide negative electrode for a lithium ion battery, comprising the following steps:

[0028] (1) Preparation of alloy powder: the alloy powder is composed of the following components by atomic percentage: Mn: 60% to 70%; Ni: 5% to 20%; Cu: 5% to 10%; transition metal A: 5% ~10%; transition metal B: 5%~15%, put alcohol as a dispersant and alloy powder together in a high-energy ball mill for mechanical alloying, and vacuum dry after ball milling to obtain evenly dispersed alloy powder;

[0029] (2) Preparation of casting solution: Add the alloy powder prepared in step (1) together with the solvent into a three-necked flask for mechanical stirring; after mechanical stirring for 10-30 minutes, add porogen and thickener and continue stirring for 12-24 hours, Obtain a casting solution in which alloy powder, porogen and thickener are uniformly dispersed in a solvent;

[0030] (3) Scraping film: Pour the casting solution obtai...

Embodiment 1

[0034] A self-supporting three-dimensional nano-graded hole high-entropy alloy electrolyzed water material and a preparation method thereof, comprising the following steps:

[0035] (1) Preparation of alloy powder: Mix the powders of each component with atomic ratio: Mn: 68%; Ni: 8%; Cu: 8%; Fe: 8%; Co: 8% Add 25g of alloy powder raw material into the ball mill, control the mass ratio of ball to material to 5:1, the ball milling time is 24h, the ball milling speed is 200r / min, and 15ml of alcohol is used as a dispersant to prepare uniformly dispersed alloy powder;

[0036] (2) Preparation of film casting solution: 20 g of alloy powder prepared in step (1) and 25 g of solvent are added together in a three-necked flask for mechanical stirring; after mechanical stirring for 10 min, 3 g of porogen and 0.5 g of thickener are added to continue stirring for 24 hours , obtain alloy powder, porogen and thickener in the casting film liquid that disperses uniformly in solvent, wherein po...

Embodiment 2

[0046] A self-supporting three-dimensional nano-graded hole high-entropy alloy electrolyzed water material and a preparation method thereof, comprising the following steps:

[0047] (1) Preparation of alloy powder: Mix the powders of each component with the atomic ratio: Mn: 60%; Ni: 10%; Cu: 10%; Ti: 10%; Add 25g of alloy powder raw material into the ball mill, control the mass ratio of ball to material to 10:1, the ball milling time is 12h, the ball milling speed is 150r / min, and 10ml of alcohol is used as a dispersant to prepare evenly dispersed alloy powder;

[0048] (2) Preparation of casting solution: 15 g of alloy powder prepared in step (1) and 20 g of solvent are added together in a three-necked flask for mechanical stirring; after mechanical stirring for 10 min, 2.5 g of porogen and 0.5 g of thickener are added to continue stirring for 12 Hour, obtain alloy powder, porogen and thickener to disperse uniformly in the casting solution in solvent, wherein porogen is poly...

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Abstract

A method for preparing a self-supporting three-dimensional nano-graded porous high-entropy alloy electrolyzed water material, comprising the following steps: (1) Preparation of alloy powder: the alloy powder is composed of the following components by atomic percentage: Mn: 60% ~70%; Ni: 5% ~ 20%; Cu: 5% ~ 10%; transition metal A except Mn, Ni, Cu: 5% ~ 10%; transition metal B except Mn, Ni, Cu: 5% to 15%; (2) configuring the casting solution; (3) scraping the film; (4) sintering; (5) dealloying treatment to obtain a self-supporting three-dimensional nano-graded hole high-entropy alloy. According to the preparation method of a self-supporting three-dimensional nano-graded porous high-entropy alloy water electrolysis material according to the present invention, the obtained self-supporting three-dimensional nano-graded porous high-entropy alloy electrolytic water material can realize self-supporting without any substrate or binder ; The parameter control of scraping film, sintering and dealloying is easy to regulate the thickness and pore size distribution of the self-supporting three-dimensional nano-scaled porous high-entropy alloy film.

Description

technical field [0001] The invention relates to the field of electrolyzed water materials and preparation thereof, in particular to a self-supporting three-dimensional nano-graded pore high-entropy alloy electrolyzed water material and a preparation method thereof. Background technique [0002] With the development and progress of human society, exploring and developing clean and renewable energy is the only way to achieve sustainable development. Among many renewable energy sources, hydrogen has attracted widespread attention due to its low price and easy preparation. In the field of electrolysis of water, especially the field of alkaline water electrolysis, as an important way to obtain hydrogen, people have conducted in-depth research on it and made great progress. In water electrolysis, the oxygen evolution reaction is a four-electron reaction process, and its slow reaction kinetics has become a major obstacle limiting the high-efficiency water electrolysis. At present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C22/00C22C1/05C22C1/10C25B1/04
CPCC22C1/05C22C22/00C25B1/04C25B11/04Y02E60/36
Inventor 张志佳孙仕昊王佳敏付文兴
Owner TIANJIN POLYTECHNIC UNIV
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