Preparation method of surface microporous nickel-plating hydrogen-storage alloy

A technology of hydrogen storage alloys and surface micropores, which is applied in liquid chemical plating, metal material coating technology, coatings, etc., can solve the problem of improving the electrochemical performance of hydrogen storage alloys, and the combination of coatings and hydrogen storage alloy surfaces Limited power, easy to fall off and other problems, to achieve the effect of increasing high-rate discharge performance, improving cycle stability, and good anti-plating peeling effect

Active Publication Date: 2019-06-21
三桥惠(佛山)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bonding force between the coating and the surface of the hydrogen storage alloy is limited, and it is easy to fall off, which limits its effect on improving the electrochemical performance of the hydrogen storage alloy.

Method used

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  • Preparation method of surface microporous nickel-plating hydrogen-storage alloy

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Effect test

Embodiment 1

[0027] A method for preparing a surface microporous nickel-plated hydrogen storage alloy, comprising the following steps:

[0028] (1) Smelting: La according to chemical composition 0.75 Mg 0.25 Ni 2.2 co 0.8 Prepare the La-Mg-Ni-based hydrogen storage alloy metal raw material with a purity of more than 99%. After crushing, grinding and screening the metal raw material, induction melting is carried out under the protection of an inert gas or under vacuum conditions. The temperature is 1400°C, the melting time is 5min, and then annealing treatment is carried out under the protection of inert gas. The temperature of annealing treatment is 600°C, the annealing time is 5h, and the La-Mg-Ni based hydrogen storage alloy ingot is obtained after cooling with the furnace;

[0029] (2) Preparation of hydrogen storage alloy strips: the La-Mg-Ni based hydrogen storage alloy ingot obtained in step (1) is placed in a high-purity quartz tube with a slit at the bottom, heated until the hyd...

Embodiment 2

[0034] A method for preparing a surface microporous nickel-plated hydrogen storage alloy, comprising the following steps:

[0035] (1) Smelting: La according to chemical composition 0.75 Mg 0.25 Ni 2.2 co 0.8 Prepare the La-Mg-Ni-based hydrogen storage alloy metal raw material with a purity of more than 99%. After crushing, grinding and screening the metal raw material, induction melting is carried out under the protection of an inert gas or under vacuum conditions. The temperature is 1460°C, the melting time is 10min, and then annealing treatment is carried out under the protection of inert gas. The temperature of annealing treatment is 750°C, the annealing time is 8h, and the La-Mg-Ni based hydrogen storage alloy ingot is obtained after cooling with the furnace;

[0036] (2) Preparation of hydrogen storage alloy strips: the La-Mg-Ni based hydrogen storage alloy ingot obtained in step (1) is placed in a high-purity quartz tube with a slit at the bottom, heated until the hydr...

Embodiment 3

[0041] A method for preparing a surface microporous nickel-plated hydrogen storage alloy, comprising the following steps:

[0042] (1) Smelting: La according to chemical composition 0.75 Mg 0.25 Ni 2.2 co 0.8 Prepare the La-Mg-Ni-based hydrogen storage alloy metal raw material with a purity of more than 99%. After crushing, grinding and screening the metal raw material, induction melting is carried out under the protection of an inert gas or under vacuum conditions. The temperature is 1500°C, the melting time is 15min, and then annealing treatment is carried out under the protection of inert gas. The temperature of annealing treatment is 800°C, the annealing time is 10h, and the La-Mg-Ni based hydrogen storage alloy ingot is obtained after cooling with the furnace;

[0043] (2) Preparation of hydrogen storage alloy strips: the La-Mg-Ni based hydrogen storage alloy ingot obtained in step (1) is placed in a high-purity quartz tube with a slit at the bottom, heated until the h...

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Abstract

The invention discloses a preparation method of a surface microporous nickel-plating hydrogen-storage alloy. The preparation method of the surface microporous nickel-plating hydrogen-storage alloy comprises the following steps of (1) smelting; (2) preparing a hydrogen-storage alloy thin strip; (3) carrying out surface microporous treatment; (4) fluorinating; and (5) plating nickel. According to the preparation method provided by the invention, the binding force of a surface coating of the hydrogen-storage alloy and the surface of the alloy can be effectively improved, so that the coating is tightly combined to the surface of the hydrogen-storage alloy, and the cycling stability, the discharge capacity, the high-rate discharge performance and other electrochemical performances of the hydrogen-storage alloy are comprehensively improved.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage alloys, in particular to a method for preparing a surface microporous nickel-plated hydrogen storage alloy. Background technique [0002] With the development of the economy and the improvement of people's living standards, the demand for energy is increasing, the consumption of fossil energy is continuously increasing, and the energy crisis is becoming more and more severe. In order to solve this problem, the development and utilization of hydrogen energy has been paid more and more attention. Nickel-metal hydride batteries are an important direction of hydrogen energy applications. They have the advantages of high safety, no memory effect, and environmental friendliness. They are widely used in new energy vehicles, portable electronic products and other fields. As the main component of the anode material of Ni-MH battery, hydrogen storage alloy plays a key role in restricting the perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/02C22F1/10B22D11/06C25F3/02C23C22/34C23C18/34C23F17/00
Inventor 张虎钟喜春龙克文刘仲武余红雅
Owner 三桥惠(佛山)新材料有限公司
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