| Autor: |
Berezovets’, V., Denys, R., Ryabov, O., Zavalii, I. |
| Předmět: |
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| Zdroj: |
Materials Science; Jul2007, Vol. 43 Issue 4, p499-507, 9p, 1 Diagram, 5 Charts, 5 Graphs |
| Abstrakt: |
The crystallographic characteristics of YNi3− x Mnx pseudobinary compounds are determined by the methods of X-ray diffraction analysis. It is shown that the partial substitution of nickel for manganese occurs mainly in the layers with CaCu5-type structure but not in the layers with Mg Zn2-type structure, as was reported for A3B8X compounds. All synthesized samples are efficient absorbers of hydrogen and their hydrogen-absorption capacity monotonically decreases as the concentration of the alloying element increases. At the same time, this type of alloying substantially decreases the absorption-desorption pressure of hydrogen, which makes the developed alloys quite promising as hydrogen-storage materials. All investigated materials have good charging-discharging characteristics in KOH solutions. The best electrochemical parameters are observed for the Y Ni2.67Mn0.33 alloy ( C max = 305 mA · h/g). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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