Magnesium-based hydrogen storage material with added rare earth element and preparation method thereof

A technology for rare earth elements and hydrogen storage materials, applied in non-metallic elements, chemical instruments and methods, hydrogen and other directions, can solve the problems of unfavorable practical application of magnesium-based alloys, complicated methods of magnesium nano-powder, and low yield, etc., and achieve good hydrogen storage. Effects of kinetic performance, increased speed, low operating temperature

Active Publication Date: 2013-03-20
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

However, in the above reports, the hydrogen absorption capacity at around 300°C is only about 6.5%, and the method for preparing magnesium nanopowder is also more complicated and the output is less
These are not good for the practical application of magnesium-based alloys

Method used

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  • Magnesium-based hydrogen storage material with added rare earth element and preparation method thereof
  • Magnesium-based hydrogen storage material with added rare earth element and preparation method thereof
  • Magnesium-based hydrogen storage material with added rare earth element and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 19g of Mg and 1g of Nd, thoroughly mix and grind them in a mortar (the particle diameter is 75-100 microns), and press them in a hydraulic tablet press to obtain a block at a pressure of 15 MPa, which is used as an anode.

[0021] The block of magnesium metal and rare earth element Nd is used as the anode, and the tungsten rod is used as the cathode, and placed in a DC arc plasma equipment with a current of 150A. When the equipment is pumped to a vacuum of 2×10 -2 Pa, fill in argon gas to 0.8 atm, after the arc starts, continue to pass argon gas to 1 atm to react for 10 minutes, extinguish the arc, pass cooling water to cool the reaction temperature to room temperature, and the water pressure is 2Mpa; vacuum the DC arc plasma equipment to 2×10 -2 Pa, and then filled with argon gas 0.7atm and air 0.3atm for passivation operation; after passivation, collect the inner wall powder, which is the prepared magnesium-based hydrogen storage material. TEM figure 1 The disp...

Embodiment 2

[0023] Take 18g of Mg and 2g of La, fully mix and grind them in a mortar (the particle diameter is 75-100 microns) and press them in a hydraulic tablet press to obtain a block at a pressure of 15 MPa, which is used as an anode.

[0024] The block of magnesium metal and rare earth element La is used as the anode, and the tungsten rod is used as the cathode. Placed in a DC arc plasma device with a current of 150A, when the device is pumped to a vacuum of 2×10 -2 Pa, fill in argon gas 0.7atm and hydrogen gas 0.1atm, after arcing, continue to pass hydrogen gas to 1atm, react for 10 minutes, extinguish the arc, pass cooling water to cool the reaction temperature to room temperature, water pressure 2MPa; DC arc plasma The equipment is evacuated to 2×10 -2 Pa, and then filled with argon gas 0.7atm and air 0.3atm for passivation operation; after passivation, collect the inner wall powder, which is the prepared magnesium-based hydrogen storage material. PCT figure 2 The hydrogen ab...

Embodiment 3

[0026] Take 16.5g of Mg and 3.5g of Er, thoroughly mix and grind them in a mortar (the particle diameter is 75-100 microns), and press them in a hydraulic tablet press to obtain a block at a pressure of 15 MPa, which is used as an anode.

[0027] The block of magnesium metal and rare earth element Er is used as the anode, and the tungsten rod is used as the cathode. Placed in a DC arc plasma device with a current of 150A, when the device is pumped to a vacuum of 2×10 -2 Pa, filled with argon gas 0.8atm, after arcing, continue to pass hydrogen to 1atm, react for 10 minutes, extinguish the arc, pass cooling water to cool the reaction temperature to room temperature, water pressure 2MPa; vacuum the DC arc plasma equipment to 2×10 -2 Pa, and then filled with argon gas 0.7atm and air 0.3atm for passivation operation; after passivation, collect the inner wall powder, which is the prepared magnesium-based hydrogen storage material. PCT Figure 4 The hydrogen absorption results sho...

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Abstract

The invention discloses a magnesium-based hydrogen storage material with added rare earth elements and a preparation method thereof; the magnesium-based hydrogen storage material comprises the following components of magnesium metal and rare earth elements; the mass percent of the rare earth elements is 0.1%-20%, and the mass percent of the magnesium metal is 80%-99.9%; the rare earth elements comprise one or more than one of La, Ce, Pr, Nd, Sm and Er; the magnesium-based hydrogen storage material of the invention has good hydrogen storage dynamic performance; compared with pure magnesium nano-powder prepared under same conditions, the magnesium-based hydrogen storage material has a lower hydrogen storage-release operation temperature, a closer hydrogen absorption-desorption plateau pressure, an obviously higher speed, and a maintained high hydrogen storage capacity, and has a hydrogen absorption amount of up to 7.26% at about 300 DEG C.

Description

technical field [0001] The invention relates to a high-capacity magnesium-based hydrogen storage material, in particular to a nano-scale magnesium-based hydrogen storage material added with rare earth elements. Background technique [0002] Magnesium-based hydrogen storage materials are considered to be one of the most promising metallic hydrogen storage materials due to their large hydrogen storage capacity, abundant resources, and low cost. The principle is to realize the storage and release of hydrogen through the reversible reaction between hydrogen gas and hydrogen storage alloy, that is, when the external heat is transferred to the metal hydride, it will decompose into hydrogen storage alloy and release hydrogen gas, otherwise, hydrogen and storage When hydrogen alloys form hydrides, the hydrogen is stored in a bound form in the solid state. Using hydrogen storage materials to store and transport hydrogen has the following characteristics: low density, only 1.74g / cm ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/00C01B3/00B22F9/02
CPCY02E60/327Y02E60/32
Inventor 邹建新应燕君曾小勤丁文江
Owner 浙江镁源动力科技有限公司
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