CN1294201A - Quickly quenched microcrystal alloy as hydrogen-storing electrode - Google Patents
Quickly quenched microcrystal alloy as hydrogen-storing electrode Download PDFInfo
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- CN1294201A CN1294201A CN99113356A CN99113356A CN1294201A CN 1294201 A CN1294201 A CN 1294201A CN 99113356 A CN99113356 A CN 99113356A CN 99113356 A CN99113356 A CN 99113356A CN 1294201 A CN1294201 A CN 1294201A
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- alloy
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- storing electrode
- quickly quenched
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
A quickly quenched microcrystal alloy used as hydrogen storing electrode is prepared by quickly quencing the molten body with copper roller. The smelting temp is 900-1600 deg.K and the linear speed of copper roller is 20-30 m/s. The chemical components of said alloy are Re, Ni, Al and Cu. Its advantage is high industrial feasibility.
Description
The present invention relates to store hydrogen and electrode materials, a kind of quickly quenched microcrystal alloy as hydrogen-storing electrode is provided especially.
Hydrogen-storage alloy has been obtained significant progress since sixties Mo in this century is found, the successful Application on secondary cell especially is considered to 21st century a kind of energy functional materials of development prospect extremely.The preparation technology of hydrogen-storage alloy mainly adopts founding+ball milling method at present, and contains the cobalt element of the 10wt.% that has an appointment in the alloy.This just makes that the alloy cooling rate is fast, easily produces the composition local derviation and causes unstable properties, brings difficulty to production, and the cost of alloy height.Thereby even, the low-cost non-cobalt hydrogen storage alloy of acquisition composition is the target that people pursue always.
The object of the present invention is to provide a kind of quickly quenched microcrystal alloy as hydrogen-storing electrode, it realizes very easily that industrial excellent property and cost of alloy are cheap.
The invention provides a kind of quickly quenched microcrystal alloy as hydrogen-storing electrode, it is characterized in that: weight percent consists of RE30-38, Ni49-66, Al2-6, Cu2-7.RE is commercially available mishmetal among the present invention, and its adding makes alloy form multiphase structure, and the adding of easily-activated elemental copper in addition improves the activation performance of alloy, makes alloy can make alloy reach service requirements in 1-5 electrochemistry loop cycle.Owing to replaces cobalt element with copper in the alloy, thereby the cost of alloy is reduced greatly, but the chemical property of alloy descends not quite.According to alloy element action mechanism, do not having under the condition of manganese element, this alloy very easily forms column crystal in process of cooling, but not equiaxed grain structure, this extremely helps the improvement of performance.
The present invention is different from the founding+ball-milling technology of the hydrogen-storage alloy that generally adopts at present, adopt melt copper roller fast quenching technology to prepare microcrystal alloy as hydrogen-storing electrode, promptly solidify and make a kind of crystallite hydrogen-storage alloy of forming by tiny column crystal with rapid solidification feature, composition and even structure unanimity by alloy slewing on the copper roller, it is characterized in that: smelting temperature 1600-1900K, copper roller linear velocity 20-30m/s.The acquisition of tiny column crystal has greatly reduced the crystal lattice stress of alloy, has reduced it and has inhaled the plateau pressure of hydrogen discharge reaction, has improved the stability of hydride, and has made the alloy platform identity better, is more suitable for as the MH/Ni secondary battery cathode material.
Below by embodiment in detail feature of the present invention and content are described in detail.
The microstructure of the alloy of accompanying drawing 1 embodiment 1
The microstructure of the alloy of accompanying drawing 2 embodiment 2
The microstructure of the alloy of accompanying drawing 3 embodiment 3
Embodiment 1:
The composition of alloy is: and RE30 (La51%, Ce5%, Nd36%, Pr8%), Ni66, Al2, Cu2; Rapid quenching technique is: smelting temperature 1700K, roller linear velocity 25m/s.
Make alloy microscopic structure and form, as shown in Figure 1 by the long column crystal of about 10-20 μ m.
The chemical property that makes alloy is:
(1) reactivation cycle: 2 times
(2) electrochemistry capacitance: 260mAh/g
(3) cycle life: 〉=500 times
(4) plateau pressure: 0.05MPa
Embodiment 2:
The composition of alloy is: and RE33 (La51%, Ce5%, Nd36%, Pr8%), Ni59, Al4, Cu4; Rapid quenching technique is: smelting temperature 1800K, roller linear velocity 20m/s.
The microstructure that makes alloy is made up of the long column crystal of about 30-50 μ m, as shown in Figure 2.
The chemical property that makes alloy is:
(1) reactivation cycle: 3 times
(2) electrochemistry capacitance: 290mAh/g
(3) cycle life: 〉=500 times
(4) plateau pressure: 0.06MPa
Embodiment 3:
The composition of alloy is: and RE37 (La51%, Ce5%, Nd36%, Pr8%), Ni55, Al2, Cu6; Rapid quenching technique is: smelting temperature 1850K, roller linear velocity 28m/s.
The microstructure that makes alloy is made up of the long column crystal of about 20-30 μ m, as shown in Figure 3.
The chemical property that makes alloy is:
(1) reactivation cycle: 2 times
(2) electrochemistry capacitance: 280mAh/g
(3) cycle life: 〉=400 times
(4) plateau pressure: 0.03MPa
Claims (2)
1. quickly quenched microcrystal alloy as hydrogen-storing electrode, it is characterized in that: weight percent consists of RE30-38, Ni49-66, Al2-6, Cu2-7.
2. the preparation method of the described quickly quenched microcrystal alloy as hydrogen-storing electrode of claim 1 is to adopt melt copper roller rapid quenching technique, it is characterized in that: smelting temperature 1600-1900K, copper roller linear velocity 20-30m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113356A CN1294201A (en) | 1999-10-20 | 1999-10-20 | Quickly quenched microcrystal alloy as hydrogen-storing electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113356A CN1294201A (en) | 1999-10-20 | 1999-10-20 | Quickly quenched microcrystal alloy as hydrogen-storing electrode |
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| Publication Number | Publication Date |
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| CN1294201A true CN1294201A (en) | 2001-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN99113356A Pending CN1294201A (en) | 1999-10-20 | 1999-10-20 | Quickly quenched microcrystal alloy as hydrogen-storing electrode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597766B (en) * | 2009-05-07 | 2012-08-22 | 新奥科技发展有限公司 | Cathode catalyst used for producing hydrogen from organic waste water and preparation method thereof |
-
1999
- 1999-10-20 CN CN99113356A patent/CN1294201A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597766B (en) * | 2009-05-07 | 2012-08-22 | 新奥科技发展有限公司 | Cathode catalyst used for producing hydrogen from organic waste water and preparation method thereof |
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