Multi-element single-phase A5B19-type super-lattice hydrogen storage alloy electrode material and preparation method thereof

An A5B19, hydrogen storage alloy technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems that the sintering method is difficult to meet the large-scale industrial production, the operation steps are complicated, and the temperature is difficult to control.

Active Publication Date: 2018-06-15
包头中科轩达新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhang et al. prepared the cast alloy by induction melting, and then obtained the A alloy composed of 2H and 3R type allotropic phases through the steps of powder making, sintering and annealing of the cast alloy. 5 B 19 Type single phase La 4 MgNi 19 alloy, but the operation steps of this method are complicated, the temperature is difficult to control, and the sintering method is difficult to meet the large-scale industrial production
There are no literature and patent reports to obtain single-phase A 5 B 19 Type multi-element La–Mg–Ni alloy electrode material

Method used

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  • Multi-element single-phase A5B19-type super-lattice hydrogen storage alloy electrode material and preparation method thereof
  • Multi-element single-phase A5B19-type super-lattice hydrogen storage alloy electrode material and preparation method thereof
  • Multi-element single-phase A5B19-type super-lattice hydrogen storage alloy electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1 A multi-element single-phase A 5 B 19 Type Superlattice Hydrogen Storage Alloy Electrode Material

[0040] The chemical composition of the alloy prepared in this embodiment is: La 0.78 Mg 0.22 Ni 3.75 Al 0.05 , the preparation method is carried out according to the following steps:

[0041] (11) Ingredients

[0042] Select metal elemental La, Mg, Ni and Al as raw materials, carry out batching according to the alloy chemical composition of this embodiment, consider the volatilization loss in smelting, supplement and increase the volatilization amount of corresponding elements when batching, and then put other raw materials except Mg into into the crucible of the vacuum induction melting furnace, and the Mg is put into the secondary feeding bin;

[0043] (12) Smelting

[0044] Induction smelting of ingredients by conventional induction smelting method, in which Mg is added by secondary feeding, and then poured and cooled to obtain alloy ingots;

[0045]...

Embodiment 2

[0051] Example 2 A multi-element single-phase A 5 B 19 Type Superlattice Hydrogen Storage Alloy Electrode Material

[0052] The alloy composition of this embodiment is: La 0.84 Mg 0.16 Ni 3.60 co 0.04 Al 0.12 , the preparation method is carried out according to the following steps:

[0053] (21) Ingredients

[0054]Select metal elemental La, Mg, Ni, Co and Al as raw materials, carry out batching according to the above alloy chemical composition, consider the volatilization loss during smelting, increase the volatilization of corresponding elements when batching, and then put other raw materials except Mg into the crucible of the vacuum induction melting furnace, and the Mg is put into the secondary feeding bin;

[0055] (22) Smelting

[0056] Induction smelting of ingredients by conventional induction smelting method, in which Mg is added by secondary feeding, and then poured and cooled to obtain alloy ingots;

[0057] (23) Heat treatment

[0058] Place the alloy in...

Embodiment 3

[0063] Example 3 A multi-element single-phase A 5 B 19 Type Superlattice Hydrogen Storage Alloy Electrode Material

[0064] The alloy composition of the present embodiment is: La 0.65 Nd 0.07 SM 0.08 Mg 0.20 Ni 3.50 Al 0.15 , the preparation method is carried out according to the following steps:

[0065] (31) Ingredients

[0066] Select metal elemental La, Nd, Sm, Mg, Ni and Al as raw materials, carry out batching according to the above-mentioned alloy chemical composition, consider the volatilization loss during smelting, increase the volatilization amount of corresponding elements when batching, and then add other elements except Mg The raw materials are put into the crucible of the vacuum induction melting furnace, and the Mg is put into the secondary feeding bin;

[0067] (32) Smelting

[0068] Induction smelting of ingredients by conventional induction smelting method, in which Mg is added by secondary feeding, and then poured and cooled to obtain alloy ingots;...

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Abstract

The present invention discloses a multi-element single-phase A5B19-type super-lattice hydrogen storage alloy electrode material. The chemical composition of the material is La<1-a-b-c-d-e>PrNdSm<c>Gd<d>Mg<e>Ni<k-x-y-z>Co<x>Al<y>Mn<z>. The alloy has relatively high discharge capacity, good electrochemical cycling stability and high rate discharge performance, wherein the maximum discharge capacity >=363 mAh / g, capacity retention ratio >=88.8% after 100 charging and discharging cycles, and HRD1500 >=58.2%. The present invention also provides a preparation method of the multi-element single-phase A5B19-type super-lattice hydrogen storage alloy electrode material. A cast alloy is prepared via an induction melting method, and then the alloy is subjected to heat treatment. The method has the advantages of simplicity, stable conditions and good repeatability. The prepared alloy has the advantages of uniform composition, small crystalline grain, intact crystal form, stable structure, application in large-scale production and short preparation period. The present invention can be applied to the preparation of the multi-element single-phase A5B19-type super-lattice hydrogen storage alloy electrode material.

Description

technical field [0001] The invention belongs to the field of preparation of new energy materials, and relates to a single-phase alloy electrode material and a preparation method thereof, in particular to a multi-element single-phase A 5 B 19 Type superlattice hydrogen storage alloy electrode material and preparation method thereof. Background technique [0002] In recent years, strategic emerging industries represented by new energy vehicles have put forward new demands for hydrogen storage materials. Nickel-metal hydride (Ni / MH) secondary batteries with rare earth alloy hydride hydrogen storage materials as negative electrodes occupy an important share in power batteries for new energy vehicles. The new energy vehicle power battery upgrading project not only provides opportunities for the development of nickel-metal hydride batteries, but also puts forward higher requirements for the performance of nickel-hydrogen power batteries such as capacity, discharge capacity, cycl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M10/30C22C19/05C22F1/02C22F1/10
CPCC22C19/058C22F1/02C22F1/10H01M4/364H01M4/383H01M10/30Y02E60/10
Inventor 韩树民张璐赵雨萌王文凤
Owner 包头中科轩达新能源科技有限公司
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