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Preparation method of hydrogen storage alloy composite material

A technology of composite materials and hydrogen storage alloys, which is applied in the field of materials, can solve the problems that the discharge capacity is greatly affected by temperature and the battery’s high-rate discharge performance is poor, and achieve the effects of low cost, excellent discharge performance, and good discharge capacity

Active Publication Date: 2019-11-22
上海中海龙高新技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the capacity of most electrode materials on the market decays quickly, and the discharge capacity is greatly affected by temperature. Some batteries even have poor high-rate discharge performance.

Method used

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  • Preparation method of hydrogen storage alloy composite material
  • Preparation method of hydrogen storage alloy composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Press LaY 2 Ni 9.5 mn 0.5 Al 0.5 The stoichiometric proportion of the molecular formula, La, Y, Ni, Mn, Al and other metals (purity higher than 99.9%) are placed in the melting furnace from low to high in order of melting point, and cooled and protected by circulating water In a copper crucible, it is arc smelted in an argon atmosphere, and then cooled naturally in the furnace to form an alloy ingot. In order to ensure the uniformity of the alloy, the alloy is turned over three times in the furnace, and the smelted alloy is naturally cooled and taken out. Grind it in an agate mortar and grind it, and sieve it with a 200-mesh sieve to obtain LaY 2 Ni 9.5 mn 0.5 Al 0.5 alloy powder.

[0029] Take 99.9% BFe alloy and citric acid and place them in a ball milling jar at a ratio of 1:1, then take small balls with a ball-to-material ratio of 1:15 and put them in a ball milling jar, pass protective gas argon into the ball milling jar, and place In the high-energy ball m...

Embodiment 2

[0034] Press LaY 2 Ni 9.5 mn 0.5 Al 0.5 The stoichiometric proportion of the molecular formula, La, Y, Ni, Mn, Al and other metals (purity higher than 99.9%) are placed in the melting furnace from low to high in order of melting point, and cooled and protected by circulating water In a copper crucible, it is arc smelted in an argon atmosphere, and then cooled naturally in the furnace to form an alloy ingot. In order to ensure the uniformity of the alloy, the alloy is turned over three times in the furnace, and the smelted alloy is naturally cooled and taken out. Grind it in an agate mortar and grind it, and sieve it with a 200-mesh sieve to obtain LaY 2 Ni 9.5 mn 0.5 Al 0.5alloy powder.

[0035] Take 99.9% BFe alloy and citric acid and place them in a ball milling jar at a ratio of 1:1, then take small balls with a ball-to-material ratio of 1:15 and put them in a ball milling jar, pass protective gas argon into the ball milling jar, and place In the high-energy ball mi...

Embodiment 3

[0040] Press LaY 2 Ni 9.5 mn 0.5 al 0.5 The stoichiometric proportion of the molecular formula, La, Y, Ni, Mn, Al and other metals (purity higher than 99.9%) are placed in the melting furnace from low to high in order of melting point, and cooled and protected by circulating water In a copper crucible, it is arc smelted in an argon atmosphere, and then cooled naturally in the furnace to form an alloy ingot. In order to ensure the uniformity of the alloy, the alloy is turned over three times in the furnace, and the smelted alloy is naturally cooled and taken out. Grind it in an agate mortar and grind it, and sieve it with a 200-mesh sieve to obtain LaY 2 Ni 9.5 mn 0.5 al 0.5 alloy powder.

[0041] Take 99.9% BFe alloy and citric acid and place them in a ball milling jar at a ratio of 1:1, then take small balls with a ball-to-material ratio of 1:15 and put them in a ball milling jar, pass protective gas argon into the ball milling jar, and place In the high-energy ball m...

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Abstract

The invention relates to a preparation method of a hydrogen storage alloy composite material. The preparation method of the hydrogen storage alloy composite material comprises the following steps: uniformly mixing a BFe material and citric acid according to a certain ratio through ball milling, heating in a tubular furnace to oxidize and decompose the citric acid into carbon, and coating the BFe material with the carbon; and performing the ball milling treatment on the obtained BFe-C material and LaY2Ni9.5 Mn0. 5Al0. 5 hydrogen storage alloy according to the proportion of 1-15: 100, and obtaining the BFe-C / LaY2Ni9.5 Mn0. 5Al0. 5 hydrogen storage alloy composite material. The obtained hydrogen storage composite material is simple in preparation method, good in discharge capacity and good instability.

Description

technical field [0001] The invention relates to the field of material technology, and in particular to a method for preparing a composite hydrogen storage alloy material. Background technique [0002] Energy is indispensable for human survival and development. With the progress of human society and the improvement of living standards, the demand for energy is also increasing. Human beings have realized that limited fossil energy, such as oil and natural gas, will be exhausted one day, forcing human beings to work hard to find a Renewable clean energy. [0003] Since hydrogen storage alloys were first proposed in 1958, hydrogen storage alloys have attracted worldwide attention due to their high energy density, good cycle stability, good performance at high rates, and their non-pollution to the environment. Ni-MH battery is a high-energy green secondary battery with hydrogen storage alloy as the negative electrode material. It has excellent electrochemical performance as we...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/583H01M10/30C22C19/03C22C1/02B22F1/00B22F1/02B22F9/04
CPCB22F1/0003H01M4/362H01M4/366H01M4/383H01M4/583H01M10/30C22C19/03C22C1/023B22F9/04B22F2009/043B22F1/17Y02E60/10
Inventor 李书存尹伟强王嘉豪
Owner 上海中海龙高新技术研究院
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