Low cost hydrogen storage alloy, preparation method and application thereof

A hydrogen storage alloy, low-cost technology, applied in the field of hydrogen storage alloy and its preparation, can solve the problem of high cost

Active Publication Date: 2009-12-30
XIAMEN TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the content of Co and Ni in this patent is lower than that of conventional hydrogen st

Method used

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  • Low cost hydrogen storage alloy, preparation method and application thereof
  • Low cost hydrogen storage alloy, preparation method and application thereof
  • Low cost hydrogen storage alloy, preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0027] The design composition is La 0.62 Ce 0.27 PR 0.03 Nd 0.08 Ni 3.955 co 0.075 mn 0.52 Al 0.2 Cu 0.5 , according to the weight percentage of the composition shown, the prepared raw materials are placed in a vacuum induction quenching furnace, vacuumed and then filled with argon for protection, and then induction heating and melting is carried out at a melting temperature of 1300-1600 ° C, followed by casting Rapid cooling is carried out on a high-speed rotating copper roller with internal cooling water to obtain alloy flakes with a thickness of 0.1-0.3mm. The obtained alloy flakes are kept at 1000°C for 6.5 hours. After cooling, alloy powders with a particle size of less than 140 mesh are produced.

Embodiment 2

[0044] The design composition is La 0.634 Ce 0.257 PR 0.027 Nd 0.082 Ni 3.805 co 0.075 mn 0.52 Al 0.25 Cu 0.6 , except that the design components are different from embodiment 1, other are the same as embodiment 1.

Embodiment 3

[0056] The design composition is La 0.634 Ce 0.257 PR 0.027 Nd 0.082 Ni 3.675 co 0.075 mn 0.65 Al 0.05 Cu 0.8 , heat treatment process is 960 ℃ of insulation 6.5 hours, except that, others are the same as embodiment 1.

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Abstract

The invention discloses a low cost hydrogen storage alloy which is AB5 type alloy with the general formula of Laa M(1-a) Nib Coc Mnd Ale Cuf, wherein M is at least one in Ce, Pr, Nd, Pm, Sm, Dy, Y, Zr and Ti; a, b, c, d, e and f represent mole ratio with the number range: a is more than or equal to 0.3 and less than or equal to 0.8, b is more than 3.6 and less than or equal to 4.1, c is more than 0 and less than or equal to 0.15, d is more than or equal to 0.3 and less than or equal to 0.65, e is more than or equal to 0.04 and less than or equal to 0.35, f is more than or equal to 0.3 and less than or equal to 1.0, and the sum of b, c, d, e and f is more than or equal to 5.1 and less than or equal to 5.35. The hydrogen storage alloy has CaCu5 crystal structure, and the ratio (c/a) of lengths of c axis and an axis of the CaCu5 crystal structure is more than or equal to 0.81. The invention also discloses a preparation method of the hydrogen storage alloy as well as the application thereof in negative pole material of a nickel-metal hydride battery. The hydrogen storage alloy has low cost, good activation performance, large discharge capacity and long cycle life.

Description

technical field [0001] The invention relates to a hydrogen storage alloy and a preparation method thereof, and relates to the application of the alloy in negative electrode materials of nickel-hydrogen batteries. Background technique [0002] With the improvement of small Ni / MH battery capacity, environmental protection and pollution-free, and better safety, Ni / MH batteries have become the most powerful competitors in the secondary power supply market, especially in the field of digital product supporting applications in the past two years. , has highlighted a strong growth momentum. Hydrogen storage alloys are key materials that determine the performance of Ni / MH batteries. Hydrogen storage alloy is a new type of functional material, which uses the voids of the crystal to store a large amount of hydrogen atoms. This alloy has reversible hydrogen absorption and desorption capabilities at room temperature. It can store hydrogen equivalent to thousands of times the volume of...

Claims

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Application Information

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IPC IPC(8): C22C19/03C22C1/02B22D11/06C22F1/10H01M4/38H01M4/24
CPCY02E60/124Y02E60/10
Inventor 张鹏杨金洪钱文连张永健蒋义淳陈永刚陈跃辉林建雄
Owner XIAMEN TUNGSTEN
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