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Nickel or nickel alloy porous material with directional holes, preparation method thereof and application thereof in a hydrogen evolution electrode

A technology of porous materials and nickel alloys, applied in electrodes, metal processing equipment, electrolysis processes, etc., can solve the problems of no directional pore structure, uneven pore size of porous copper, etc., to improve electrolysis efficiency, reduce hydrogen evolution overpotential, raw materials A wide range of effects

Pending Publication Date: 2020-01-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

South Korea’s OH uses copper oxide powder as raw material, camphene as solvent, and freezes the mixed slurry at -25°C. The obtained porous copper has uneven pore size and no directional pore structure.

Method used

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  • Nickel or nickel alloy porous material with directional holes, preparation method thereof and application thereof in a hydrogen evolution electrode
  • Nickel or nickel alloy porous material with directional holes, preparation method thereof and application thereof in a hydrogen evolution electrode
  • Nickel or nickel alloy porous material with directional holes, preparation method thereof and application thereof in a hydrogen evolution electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A Ni-Mo alloy porous material with directional pores in this embodiment, the composition of the porous material is a nickel-molybdenum binary alloy; wherein: the pore diameter of the porous material is ~ 7 μm; the porosity of the porous material is 85%.

[0043] The Ni-Mo alloy porous material with directional pores described above in this embodiment is prepared by the following method, which specifically includes the following steps:

[0044] Add 52.3g NiO powder, 5.3gMoO to the ball mill jar 3 Powder, 81g of deionized water and 1.5g of gelatin as a binder, 0.081g of xanthan gum as a thickener, after ball milling and mixing for 12 hours, a uniform water-based slurry is obtained; the slurry is injected into a square plastic with copper at the bottom Put the mold on the copper substrate connected to the freezing device at the lower end, set the temperature at the lower end of the cold field to -50°C, and the temperature at the upper end to -5°C. After the green body is ...

Embodiment 2

[0047] A porous nickel with oriented pores in this embodiment, the composition of the porous material is pure nickel; wherein: the pore diameter of the porous material is ~25 μm; the porosity of the porous material is 70%.

[0048] The porous nickel with oriented pores described above in this embodiment is prepared by the following method, which specifically includes the following steps:

[0049] Add 95g nickel powder, 60g deionized water and 1.8g gelatin in the mixing tank as binder, 0.012g methylcellulose as thickener, after ball milling and mixing for 12h, obtain uniform water-based nickel slurry; The material is poured into a mold with a copper bottom, and placed on a copper substrate connected to a freezing device at the bottom. Set the temperature at the lower end of the cold field to -20°C, and the temperature at the upper end to -20°C. After the green body is completely frozen, move it to a freeze dryer to remove ice crystals. After drying, transfer the green body to a...

Embodiment 3

[0051] A porous nickel-copper alloy with oriented pores in this embodiment, the composition of the porous material is nickel and copper; wherein: the pore diameter of the porous material is ~15 μm; the porosity of the porous material is 60%.

[0052] The above-mentioned porous nickel-copper alloy with directional holes in this embodiment is prepared by the following method, which specifically includes the following steps:

[0053] Add 100g of nickel-copper alloy powder (copper content 32%), 50g of deionized water and 2.5g of gelatin into the ball mill jar as a binder, and 0.010g of methyl cellulose as a thickener. After ball milling and mixing for 12 hours, a uniform water Nickel-copper alloy slurry; inject the slurry into a square plastic mold with copper at the bottom, put it on the copper substrate connected to the freezing device at the bottom, set the temperature at the lower end of the cold field to -30°C, and the temperature at the upper end to 5°C. After the green body ...

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Abstract

The invention discloses a nickel or nickel alloy porous material with directional holes, a preparation method thereof and application thereof in a hydrogen evolution electrode. The method comprises the steps that water-based nickel or mixed slurry containing nickel and alloy element powder is injected into a mold, the water-based slurry is directionally solidified and formed through a freezing temperature field, an obtained cold blank is frozen and dried to remove ice crystals, then a binder is removed in a hydrogen atmosphere, and the nickel or nickel alloy porous material is prepared throughhigh-temperature sintering. Preparation of nickel-based alloys with different components can be achieved by controlling the powder components in the slurry, and the porosity, the hole diameter and the microstructure of the alloys can be finely adjusted and controlled through the solid phase content and the freezing condition. The nickel or nickel alloy porous material has the advantages that theprocess is simple, the raw material source is wide, and the nickel-based alloy porous material with the different components and high porosity and high air permeability can be prepared. The prepared porous material is beneficial to release of hydrogen in the water electrolysis process, the hydrogen evolution overpotential can be reduced, the electrolysis efficiency can be improved, and the nickelor nickel alloy porous material has application potential in the field of water electrolysis hydrogen evolution.

Description

technical field [0001] The invention belongs to the technical field of porous metal material preparation, and in particular relates to a nickel or nickel alloy porous material with oriented pores, a preparation method thereof and an application in a hydrogen evolution electrode. Background technique [0002] At present, due to the excessive development and use of traditional fossil fuels such as coal, oil, and natural gas, global environmental pollution and energy crises have been triggered. In comparison, the energy density of hydrogen (140MJ / kg) is more than twice that of ordinary solid fuels (50MJ / kg), and the combustion product is water. It is considered to be an ideal energy source to replace fossil fuels and solve energy and environmental crises. one. At present, the world produces about 4 billion tons of hydrogen per year, of which 95% comes from the hydrocarbon steam reforming process. High cost and low purity. In recent years, the use of clean energy such as sunl...

Claims

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Application Information

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IPC IPC(8): C22C19/03C22C1/08B22F3/11B22F1/00C25B1/04C25B11/06
CPCC22C19/03B22F3/1143B22F3/1103B22F3/1121C25B1/04C25B11/04B22F1/103B22F1/10Y02E60/36
Inventor 刘新利祖利国张雷王德志吴壮志段柏华
Owner CENT SOUTH UNIV
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