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Magnesium-containing superlattice hydrogen storage alloy and preparation method thereof

A technology of hydrogen storage alloy and superlattice, which is applied in the field of magnesium-containing superlattice hydrogen storage alloy and its preparation, can solve the problems of poor high-current discharge capability, hindering application, and poor battery self-discharge performance, and achieve high-current discharge Strong ability, improved market competitiveness, and low self-discharge performance

Inactive Publication Date: 2011-10-26
鞍山鑫普新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-ion batteries, due to their high cost and poor high-current discharge performance, especially after long-term storage, hinder their application in high-end fields such as electric tools
Although Ni-MH batteries have the advantages of low price, high discharge capacity, long cycle life, and large current discharge, the self-discharge performance of the battery is poor, and the capacity retention rate is only about 30% after half a year. Charging before the first use, which caused great inconvenience to the user

Method used

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  • Magnesium-containing superlattice hydrogen storage alloy and preparation method thereof
  • Magnesium-containing superlattice hydrogen storage alloy and preparation method thereof
  • Magnesium-containing superlattice hydrogen storage alloy and preparation method thereof

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Effect test

Embodiment 1

[0021] According to the chemical formula Mm 0.66 La 0.2 Mg 0.13 Zr 0.01 (Ni 0.94 Al 0.06 ) 3.5 For batching, the subscript values ​​of each component represent the molar ratio, and the active ingredient content (mass percentage) in each component is: La≥99.5%, Mm total amount of rare earth≥99.5%, Mg≥99.9%, Zr≥99.5%, Ni≥99.95%, Al≥99.5%, the raw materials are made into hydrogen storage alloy powder after vacuum induction melting, vacuum heat treatment and low-temperature impact mill crushing.

Embodiment 2

[0023] According to the chemical formula Mm 0.71 La 0.15 Mg 0.13 Zr 0.01 (Ni 0.94 Al 0.06 ) 3.5 For batching, the subscript values ​​of each component represent the molar ratio, and the active ingredient content (mass percentage) in each component is: La≥99.5%, Mm total amount of rare earth≥99.5%, Mg≥99.9%, Zr≥99.5%, Ni≥99.95%, Al≥99.5%, the raw materials are made into hydrogen storage alloy powder after vacuum induction melting, vacuum heat treatment and low-temperature impact mill crushing.

Embodiment 3

[0025] According to the chemical formula Mm 0.78 La 0.08 Mg 0.13 Ti 0.01 (Ni 0.94 Al 0.06 ) 3.5 For batching, the subscript values ​​of each component represent the molar ratio, and the active ingredient content (mass percentage) in each component is: La≥99.5%, Mm total amount of rare earth≥99.5%, Mg≥99.9%, Ti≥99.5%, Ni≥99.95%, Al≥99.5%, the raw materials are made into hydrogen storage alloy powder after vacuum induction melting, vacuum heat treatment and low-temperature impact mill crushing.

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Abstract

The invention relates to a magnesium-containing superlattice hydrogen storage alloy and a preparation method thereof. The invention is characterized in that the chemical formula of the magnesium-containing superlattice hydrogen storage alloy is Mm[1-x-y-z]La[x]Mg[y]M[z](Ni[a]Al[b])[c], wherein Mm is rare earth or mixed rare earth metal, and at least contains one or more of La, Ce, Pr, Nd, Y and Sm; M is one or more of Ti, Zr, Hf, Ca, Sr and Ba; and x, y, z, a and b respectively represent mol ratio, 0<x<0.3, 0<y<0.25, 0<z<0.05, 0.8<a<1.0, 0<b<0.2 and 3.0<b<4.0. The hydrogen storage alloy is composed of a single phase or multiple phases. Compared with the prior art, the invention has the advantages of high heavy-current discharge capacity, favorable low self-discharge property, high capacity and long service life, and does not contain Co and Mn, thereby avoiding self-discharge caused by shuttle reaction of Co and Mn.

Description

technical field [0001] The invention relates to a magnesium-containing superlattice hydrogen storage alloy for the negative electrode of a high-end Ni-MH battery, which has high capacity, low self-discharge performance and long life, and a preparation method thereof. Background technique [0002] With the continuous advancement of science and technology, human beings demand more and more energy, resulting in increasingly serious environmental pollution, and the shortage of primary energy such as oil and coal. It has caused a serious impact on the living environment of human beings, and the development and utilization of new energy is the best way to solve the above problems. Ni-MH battery (Ni-MH battery) is a green and environmentally friendly new type of energy, which has the advantages of high discharge capacity, long cycle life, and high current discharge. It has been widely used in various fields of industry and households, electric vehicles, The use of hybrid electric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/02
CPCY02E60/10
Inventor 王常春郭靖洪姜波沈欣
Owner 鞍山鑫普新材料有限公司
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