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Praseodymium-free, neodymium-free and cobalt-free high capacity superlattice hydrogen storage alloy containing magnesium

A technology of hydrogen storage alloy and high capacity, applied in the field of hydrogen storage alloy, can solve the problem of difficulty in improving the discharge capacity of the alloy, and achieve the effects of low self-discharge performance, low cost, and reasonable PCT platform pressure

Inactive Publication Date: 2013-12-11
鞍山鑫普新材料有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Since the current price of Pr and Nd is about 4-6 times the price of high-abundance rare earths such as La and Ce, the cost of this type of alloy has a great disadvantage, and it is difficult to improve the discharge capacity of this type of alloy

Method used

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  • Praseodymium-free, neodymium-free and cobalt-free high capacity superlattice hydrogen storage alloy containing magnesium
  • Praseodymium-free, neodymium-free and cobalt-free high capacity superlattice hydrogen storage alloy containing magnesium
  • Praseodymium-free, neodymium-free and cobalt-free high capacity superlattice hydrogen storage alloy containing magnesium

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preparation example Construction

[0022] The preparation method of the low-cost and high-capacity magnesium-containing superlattice hydrogen storage alloy in the above-mentioned embodiments 1 to 15, the specific operation steps are as follows:

[0023] 1) Dosing according to the chemical formula, put the prepared raw materials into the crucible of the vacuum melting furnace;

[0024] 2) Vacuumize the vacuum melting furnace to ≤0.5Pa, fill inert gas into the vacuum induction melting furnace, and control the inflation pressure at -0.09MPa~-0.06MPa;

[0025] 3) The vacuum melting furnace starts to heat up to 1000-1600°C, and stops heating when the materials in the furnace are melted evenly;

[0026] 4) Start the feeding bin, add metal Mg into the solution, keep the temperature of the melt stable, ensure that Mg is fully melted, and stop heating after refining for 3 to 5 minutes;

[0027] 5) When the melt reaches 1150-1350°C, cast it into a water-cooled mold or cooling roll, and cool it into an alloy ingot or all...

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Abstract

The invention relates to praseodymium-free, neodymium-free and cobalt-free high capacity superlattice hydrogen storage alloy containing magnesium. The alloy is characterized in that a composite chemical formula of the alloy is one of Mm(1-x-y)LaxMgyNiaAlb, Mn(1-x-y-z)LaxMgyMzNiaAlb, Mm(1-x-y)LaxMgyNiaAlbNc or Mm(1-x-y-z)LaxMgyMzNiaAlbNc, wherein Mm is rare earth or misch metal at least containing one or more than one of La, Ce, Y, Sm and Gd; M is one or more than one of Ti, Zr and Hf; N is one or more than one of Mn, Sn, Cr, V, W and Mo; x, y, z, a, b and c represent molar ratios. Compared with the prior art, the alloy has the advantages of large discharge capacity, low cost and good low self discharge property.

Description

technical field [0001] The invention relates to the field of hydrogen storage alloys, in particular to a high-capacity magnesium-containing superlattice hydrogen storage alloy without praseodymium, neodymium and cobalt. Background technique [0002] As the price of rare earth continues to rise, especially the substantial increase of rare earth metals such as praseodymium Pr and neodymium Nd, it has brought great pressure on the production costs of rare earth downstream industries such as magnetic materials and nickel-metal hydride batteries. Especially the nickel-metal hydride battery industry, due to the competition of other batteries such as lithium-ion batteries, has no cost advantage, and the consumer market is facing the danger of gradually shrinking, casting a shadow on the development of the industry. [0003] How to reduce the production cost of hydrogen storage alloys on the premise of maintaining the performance of hydrogen storage alloys has become the key to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/00C22C30/00
Inventor 王常春姜波迟新宇沈欣柳立张远
Owner 鞍山鑫普新材料有限公司
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