Method for electro-deposition of magnesium nickel alloy in ionic liquid

An ionic liquid and electrodeposition technology, which is applied in the field of metal materials, can solve the problems of difficult control of magnesium-nickel alloy composition, high equipment requirements, and easy introduction of impurities, so as to improve the kinetic performance of hydrogen storage, simplify equipment and processes, and reduce energy consumption. consumption effect

Inactive Publication Date: 2013-12-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problems of difficult control of the composition of magnesium-nickel alloy prepared by high-temperature smelting, high energy consumption, high equipment requirements of mechanical alloying method, easy introduction of impurities, and high cost. The present invention is realized through the following technical solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for electrodepositing a magnesium-nickel alloy with the ionic liquid, its specific steps are as follows:

[0019] (1) Under the protection of inert gas, add magnesium salt (magnesium chloride), nickel salt (nickel chloride) and additives to the ionic liquid (BMIC-EG) in sequence, and mix them evenly to obtain an ionic liquid electrolyte, in which the ionic liquid electrolyte The concentration of magnesium ions is 0.05mol / L, the concentration of nickel ions is 0.05mol / L, the mass of the additive is 0.5% of the total mass of the ionic liquid electrolyte, and the additive is sodium citrate;

[0020] (2) The pretreated substrate (copper) is used as the cathode, and the metal nickel is used as the anode, and the current density is 10A / m 2 , the temperature is 20°C, and the ionic liquid electrolyte prepared in step (1) is subjected to constant current deposition for 2 hours, and then the cathode is taken out, and after washing and drying, a magnesium-nickel alloy i...

Embodiment 2

[0024] The method for electrodepositing a magnesium-nickel alloy with the ionic liquid, its specific steps are as follows:

[0025] (1) Under the protection of inert gas, in the ionic liquid ([Bmim]NTf 2 ) into magnesium salt (magnesium trifluoromethanesulfonate), nickel salt (nickel trifluoromethanesulfonate) and additives in sequence, and mix well to obtain an ionic liquid electrolyte, wherein the concentration of magnesium ions in the ionic liquid electrolyte is 0.3 mol / L, the concentration of nickel ions is 1.0mol / L, the mass of the additive is 2% of the total mass of the ionic liquid electrolyte, and the additive is a mixture of benzene, toluene and ammonium chloride with a mass ratio of 1:1:1;

[0026] (2) The pretreated substrate (nickel) is used as the cathode, the metal magnesium is used as the anode, and the current density is 100A / m 2 , the temperature is 100 ° C, and the ionic liquid electrolyte prepared in step (1) is subjected to constant current deposition for ...

Embodiment 3

[0030] The method for electrodepositing a magnesium-nickel alloy with the ionic liquid, its specific steps are as follows:

[0031] (1) Under the protection of inert gas, in the ionic liquid ([Bmim]BF 4 ) into magnesium salt (magnesium fluoroborate), nickel salt (nickel tetrafluoroborate) and additives in sequence, and mix well to obtain an ionic liquid electrolyte, wherein the concentration of magnesium ions in the ionic liquid electrolyte is 0.1mol / L, and the concentration of nickel ions The concentration is 0.5mol / L, the mass of the additive is 1.8% of the total mass of the ionic liquid electrolyte, and the additive is a mixture of ammonium chloride and choline chloride with a mass of 2:1;

[0032] (2) The pretreated substrate (stainless steel) is used as the cathode, graphite is used as the anode, and the current density is 80A / m 2 , the temperature is 60°C, and the ionic liquid electrolyte prepared in step (1) is subjected to constant current deposition for 5 hours, and ...

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Abstract

The invention relates to a method for electro-deposition of magnesium nickel alloy in ionic liquid, and belongs to the technical field of metal materials. The method for electro-deposition of the magnesium nickel alloy in the ionic liquid comprises the steps that (1) magnesium salt, nickel salt and additives are added to the ionic liquid in sequence through protection of inert gas, even mixing is carried out to obtain an ionic liquid electrolyte, (2) a preprocessed matrix serves as a cathode, metallic nickel, magnesium and graphite or other inert materials serve as an anode, constant-current deposition is carried out in the obtained ionic liquid electrolyte for 2-6 hours under the conditions that the current density is 10-100A / m<2>, and the temperature is 20-100DEG C, the cathode is taken out, washing and drying are carried out, and the magnesium nickel alloy can be obtained on the surface of the cathode matrix. The method for electro-deposition of the magnesium nickel alloy in the ionic liquid solves the problems that when a high-temperature melting method is used for preparing the magnesium nickel alloy, components cannot be easily controlled, and energy consumption is high, and the problems that mechanical alloying is high in equipment requirement, impurities can be easily introduced, and cost is high.

Description

technical field [0001] The invention relates to a method for electrodepositing a magnesium-nickel alloy with an ionic liquid, and belongs to the technical field of metal materials. Background technique [0002] Magnesium-nickel hydrogen storage alloy has a large hydrogen absorption capacity (Mg 2 NeH 4 3.6wt%), high electrochemical hydrogen storage capacity (theoretical value is 965mAh g -1 ), low density, rich resources, low price, small environmental load, and good hydrogen absorption and desorption platform, etc., it has become one of the most promising hydrogen storage materials. At present, the preparation of magnesium-nickel hydrogen storage alloy mainly adopts high-temperature melting method and mechanical alloying method. The high-temperature smelting method is the main method for preparing magnesium-nickel alloys in industry. However, since the melting points of magnesium and nickel are 650°C and 1455°C respectively, the difference between the two is as high as 8...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/36
Inventor 徐存英华一新李坚赵霁雯
Owner KUNMING UNIV OF SCI & TECH
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