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A magnesium-based composite hydrogen storage material and its preparation method

A technology for hydrogen storage materials and equipment, applied in coatings, etc., can solve the problems of poor hydrogen absorption and desorption kinetics, high activity of products that are difficult to store, and restrictions on the application of hydrogen storage materials, so as to achieve a stable hydrogen absorption and desorption platform and good storage Hydrogen kinetics performance, high yield effect

Active Publication Date: 2015-11-25
浙江镁源动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, generally speaking, the current hydrogen storage materials have disadvantages such as poor hydrogen absorption and desorption kinetics, high activation and use temperature, high product activity, difficult storage, and low yield.
These restrict the application of hydrogen storage materials

Method used

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  • A magnesium-based composite hydrogen storage material and its preparation method
  • A magnesium-based composite hydrogen storage material and its preparation method
  • A magnesium-based composite hydrogen storage material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The high-purity magnesium used in this experiment was purchased commercially with a purity of more than 99.9%. The magnesium block was cut into regular blocks of L4cm×W4cm×H2cm with a grinding wheel cutter, and the oxide layer on the surface of the magnesium block was removed with a sand mill to be used as an anode. The preparation of magnesium-based hydrogen storage composite materials is roughly divided into two steps, 1) DC arc method to prepare magnesium ultrafine powder; 2) liquid phase reduction method to prepare magnesium-based composite hydrogen storage materials. Both ferric chloride and n-butanol in the liquid phase method are commercially purchased with a purity of more than 99.5%.

[0045] (1) A method for preparing the magnesium ultrafine powder: a high-purity magnesium block is used as an anode, and a tungsten rod is used as a cathode. Placed in DC arc plasma equipment, when the equipment is pumped to a vacuum of 5×10 -2 Pa, filled with argon to 0.7atm, a...

Embodiment 2

[0049] The method for preparing ultrafine magnesium powder in this experiment is basically the same as that in Example 1. For specific operations, please refer to the relevant parts of Example 1. The following describes the preparation of Mg-Ni composite hydrogen storage materials by liquid phase reduction. Nickel chloride hexahydrate and n-butanol in the liquid phase method are commercially purchased, and the purity is above 99.5%.

[0050] A method for preparing magnesium-based ultra-fine Mg-Ni composite material through magnesium ultra-fine powder: 0.16gNiCl 2 ·6H 2 O was added to 60mL n-butanol, for the convenience of NiCl 2 ·6H 2 O is dissolved, the solution is magnetically stirred at a speed of 800rpm, and heated to 65°C. After the compound is completely dissolved, 0.80g of the magnesium ultrafine powder is placed in the solution, in order to ensure the ultrafine powder of the cation and the magnesium. The fine powder is fully contacted and reacted, and the solution i...

Embodiment 3

[0053] The method for preparing ultrafine magnesium powder in this experiment is basically the same as that in Example 1. For specific operations, please refer to the relevant parts of Example 1. The following describes the preparation of Mg-Ti composite hydrogen storage materials by liquid phase reduction. Titanium tetrachloride and tetrahydrofuran in the liquid phase method are commercially purchased, and the purity is above 99.5%.

[0054] A method for preparing magnesium-based ultrafine Mg-Ti composite materials through magnesium ultrafine powder: 60μL TiCl 4 Add 60mL tetrahydrofuran, for the convenience of TiCl 4 Dissolve, stir the solution magnetically at a speed of 500rpm, and heat to 60°C. After the compound is completely dissolved, put 0.70g of the magnesium ultrafine powder into the solution. In order to ensure the cation and magnesium ultrafine powder The solids are fully contacted and reacted, and the solution is also magnetically stirred and heated, the stirring ...

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Abstract

The invention discloses a magnesium base composite hydrogen storage material. The magnesium base composite hydrogen storage material is of a core-shell structure, wherein the core is magnesium ultrafine powder particles and is placed inside the magnesium base composite hydrogen storage material, and the shell is made of transition metal and is placed on the outer layer of the magnesium base composite hydrogen storage material. The invention further discloses a preparation method of the magnesium base composite hydrogen storage material. The method includes the following steps that magnesium metal is melted and evaporated and then is cooled, so that the magnesium ultrafine powder particles are obtained; the magnesium ultrafine powder particles and transition metal kations undergo a replacement reaction, and the transition metal coats the magnesium ultrafine powder particles to be turned into the magnesium base composite hydrogen storage material. Raw materials for preparing the magnesium ultrafine powder particles are magnesium blocks, cost is low, an electric arc powder process and a replacement coating process are simple and controllable, meanwhile, the productive rate is high, and the magnesium base composite hydrogen storage material is suitable for large-scale industrial production; the magnesium base composite hydrogen storage material can form the good core-shell structure, and is good in hydrogen storage dynamics performance, stable in hydrogen absorption and desorption platform, small in delayed reaction, high in hydrogen absorption speed and low in hydrogen desorption temperature.

Description

technical field [0001] The invention relates to a hydrogen storage material, in particular to a magnesium-based composite hydrogen storage material and a preparation method thereof. Background technique [0002] Due to the energy crisis and environmental pollution, renewable clean energy has become a research hotspot around the world. Among them, hydrogen is considered to be the most promising new energy because of its high combustion calorific value, no pollution, and abundant resources. However, the current storage and transportation of hydrogen lacks safety and reliability, which is seriously restricting the application and development of hydrogen energy. Different from traditional liquid and high-pressure gaseous hydrogen storage, people have developed a large number of solid-state hydrogen storage materials, because solid-state materials have high-quality hydrogen storage density, high safety and reliability, and low-cost characteristics. However, most solid hydrogen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/14
Inventor 邹建新龙胜曾小勤丁文江
Owner 浙江镁源动力科技有限公司
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