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Regular icosahedron titanium-base quasi-crystal material with hydrogen-storage function and its preparing method

A technology of icosahedron and quasicrystal, which is applied in the field of Ti-Zr-Ni-Cu single icosahedral quasicrystal material and its preparation, can solve problems such as production and application difficulties, achieve excellent hydrogen absorption performance, and facilitate industrial chemical, high electrochemical discharge capacity effect

Inactive Publication Date: 2007-02-14
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After 820 cycles at 0.5C, the electrochemical capacity of the hydrogen storage alloy still maintains 320mAh / g, exceeding the LaNi commonly used in Ni-MH batteries. 5 Hydrogen storage alloy powder; however, the disadvantage of this invention is that the constituent elements of the quasicrystalline material are basically selected from the main groups 1, 2, 3, 4 and subgroups 1, 2, 3, 8 of the periodic table of elements, although in the claim The protection is very wide, and the main constituent elements selected are basically active elements such as Mg, Ca, Zn, and Al, which are easily oxidized, which brings difficulties to actual production and application.

Method used

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  • Regular icosahedron titanium-base quasi-crystal material with hydrogen-storage function and its preparing method
  • Regular icosahedron titanium-base quasi-crystal material with hydrogen-storage function and its preparing method
  • Regular icosahedron titanium-base quasi-crystal material with hydrogen-storage function and its preparing method

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Experimental program
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Effect test

Embodiment 1

[0014] By composition Ti 45 Zr 35 Ni 17 Cu 3 , choose 100 mesh chemically pure Ti, Zr, Ni, Cu powder, put it into the ball mill tank of high energy ball mill, the ball to material ratio is 20:1, under the protection of argon, ball mill for 200 hours, the alloy powder after ball milling is sealed into quartz tube, in 1 x 10 -3 Heat treatment is carried out under Pa, the temperature is 580 ℃, the time is 0.5 hour, the obtained alloy powder is analyzed by XRD and electron diffraction, the results are as follows figure 1 and figure 2 , indicating that the alloy is a single icosahedral quasicrystal structure. Then measure the physical hydrogen storage capacity and hydrogen absorption performance. At 250°C, the mass percentage of hydrogen absorption in 20 minutes reaches 1.6mass%, and the hydrogen absorption kinetics curve is as follows: image 3 ; At the same time, its electrochemical absorption-desorption performance was measured in the negatively limited MH-Ni experimental...

Embodiment 2

[0016] The composition is Ti 65 Ni 30 Zr 10 Cu 5 , ball milled for 150 hours, and heat treated at 580°C for 1 hour. All the other are with embodiment 1. The XRD results of the alloy are as follows Figure 5 , indicating a single icosahedral quasicrystal structure. At 250°C, the mass percentage of hydrogen absorbed in 20 minutes reaches 1.8mass%. At 50°C, one cycle reaches the maximum discharge capacity of 512mAh / g, and the charging experiment is carried out at 50°C±1°C, and the QH is 93%.

Embodiment 3

[0018] The composition is Ti 50 Ni 30 Zr 10 Cu 10 , ball milled for 100 hours, and heat treated at 530°C for 3 hours. All the other are with embodiment 1. The alloy is a single regular icosahedral quasicrystal structure. At 250°C, the mass percentage of hydrogen absorbed in 20 minutes reaches 1.4mass%. At 30°C, the maximum discharge capacity is 376mAh / g in one cycle. The charging experiment was carried out at 30°C±1°C, and the QH was 98%.

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Abstract

The invention provides a kind of single icosahedron quasicrystal material with hydrogen storing function. Its component is Ti100-x-y-zZrxNiyCuz, thereinto, 10 Pa, the heat processing temperature is 480-650 DEG C, the time is 0.5-6 hours. Its craft is simple, the operational ability is strong, and it is easy to be industrialized.

Description

Technical field: [0001] The invention belongs to a quasi-crystal material with hydrogen storage function, and in particular relates to a thermodynamically stable and easy-to-produce Ti-Zr-Ni-Cu single icosahedral quasi-crystal material and a preparation method thereof. Background technique: [0002] Quasicrystalline alloys have a special symmetrical structure, symmetric crystal planes that are easy to react with hydrogen and a crystal structure that is conducive to the diffusion of hydrogen inside the unit cell. Quasicrystalline alloys are valued as one of the hydrogen storage alloys with great development potential; US Patent 006030724 published a patent titled "Hydrogen Storage Alloy and Its Use in Alkaline Secondary Batteries". After 500 cycles of hydrogen, the quasicrystalline structure is still not destroyed, and the hydrogen storage capacity of 3.5% by weight is maintained. The hydrogen storage alloy can be used as the negative electrode material of Ni-MH batteries. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02C22C14/00
Inventor 王立民刘宝忠吴耀明彭秋明
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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