a mg 2 Ni-type ternary mg-ni-cu reversible hydrogen storage material and preparation method thereof

A hydrogen storage material, atomic percentage technology, applied in the field of hydrogen storage, to achieve the effect of low material cost, mild preparation process, and reduced resistance

Active Publication Date: 2017-01-25
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current background technology shows that there is no preparation method that can successfully prepare hydrogen storage mechanism and Mg 2 The high-purity ternary Mg-Ni-Cu material that is exactly the same as Ni, that is, the real realization of Cu replacing Ni in the hydrogen absorption and desorption process (hydrogen absorption to form Mg 2 (Ni,Cu)H 4 , release hydrogen to form Mg 2 (Ni,Cu))

Method used

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  • a mg <sub>2</sub> Ni-type ternary mg-ni-cu reversible hydrogen storage material and preparation method thereof
  • a mg <sub>2</sub> Ni-type ternary mg-ni-cu reversible hydrogen storage material and preparation method thereof
  • a mg <sub>2</sub> Ni-type ternary mg-ni-cu reversible hydrogen storage material and preparation method thereof

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Effect test

Embodiment 1

[0020] Press Ni 9.5 Cu 0.5 The composition of Ni powder (particle size 200 mesh, purity 99.5%) and Cu powder (particle size 200 mesh, purity 99.5%) were weighed respectively, Ni powder and Cu powder 25 grams altogether. Put the weighed Ni powder and Cu powder into a stainless steel ball mill tank, add stainless steel balls according to the ball-to-material ratio of 20:1, then pour industrial alcohol to submerge the balls and materials, and seal the ball mill tank cover. The ball mill pot was placed in a ball mill for wet ball milling for 40 hours, and the rotational speed of the ball mill was 200 rpm. After ball milling, dry in an oven at 40°C for 0.5h to remove industrial alcohol and obtain highly chemically stable Ni 9.5 Cu 0.5 Solid solution powder, the powder consists of a single Ni(Cu) solid solution phase (see figure 1 (a): Ni 9.5 Cu 0.5 Solid solution powder X-ray diffraction pattern). by Mg 20 Ni 9.5 Cu 0.5 The composition of Mg powder (particle size 200 mesh...

Embodiment 2

[0022] Press Ni 9.0 Cu 1.0 The composition of Ni powder (particle size 200 mesh, purity 99.5%) and Cu powder (particle size 200 mesh, purity 99.5%) were weighed respectively, Ni powder and Cu powder 25 grams altogether. Put the weighed Ni powder and Cu powder into a stainless steel ball mill tank, add stainless steel balls according to the ball-to-material ratio of 20:1, then pour industrial alcohol to submerge the balls and materials, and seal the ball mill tank cover. The ball mill pot was placed in a ball mill for wet ball milling for 40 hours, and the rotational speed of the ball mill was 200 rpm. After ball milling, dry in an oven at 40°C for 0.5h to remove industrial alcohol and obtain highly chemically stable Ni 9.0 Cu 1.0 Solid solution powder, the powder consists of a single Ni(Cu) solid solution phase (see figure 1 (b): Ni 9.0 Cu 1.0 Solid solution powder X-ray diffraction pattern). by Mg 20 Ni 9.0 Cu 1.0 The composition of Mg powder (particle size 200 mesh...

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Abstract

The invention discloses a Mg2Ni-based ternary Mg-Ni-Cu reversible hydrogen storage material and a preparation method thereof, and belongs to the technical field of hydrogen storage. According to the composition range of the hydrogen storage material, Mg accounts for 66.7% in alloy atoms, Ni and Cu account for 33.3% in the alloy atoms, Cu accounts for 0-12% in Ni and Cu atoms, and the purity of raw materials is not lower than 99.5%. According to the method, Ni(Cu) solid solution powder high in chemical stability is prepared firstly, and then the solid solution powder and Mg powder are mixed and sintered according to a proportion to obtain the Mg2Ni-based ternary Mg20Ni10-xCux reversible hydrogen storage material high in purity, wherein x is larger than 0 and smaller than or equal to 1.2. The material is high in hydrogen storage capacity (larger than 3.5 wt%) and good in low-temperature hydrogen desorption kinetics performance. Cu replaces Ni being precious metal, so that the material use cost is lowered. The preparation method has the remarkable advantages that the process is gentle, simple and easy to control, the production equipment is low in cost, the production process is free of pollution and industrial mass production is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage, in particular to a Mg 2 Ni-type ternary Mg-Ni-Cu reversible hydrogen storage material system and its new preparation method. Background technique [0002] Hydrogen energy, wind energy, solar energy, and biomass energy are considered to be the most promising green energy sources. The key to the utilization of hydrogen energy is the development of hydrogen storage materials and their preparation technologies. Mg-based hydrogen storage materials have been extensively studied due to the advantages of large hydrogen storage capacity, low cost, and light weight. where Mg 2 Ni alloys are widely used in gaseous hydrogen storage and electrochemical anodes due to their high hydrogen storage capacity (3.6% hydrogen by mass), low hydrogen depletion temperature (about 250 °C) and fast dehydrogenation kinetics. Material. A large number of studies have shown that the replacement of Ni by transitio...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C22C23/00C22C1/04
Inventor斯庭智马勇张庆安柳东明李永涛
OwnerANHUI UNIVERSITY OF TECHNOLOGY