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The Effect of Y Con...
The Effect of Y Content on Structural and Sorption Properties of A2B7-Type Phase in the La–Y–Ni–Al–Mn System
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Jensen, Emil H. (författare)
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Lombardo, Loris (författare)
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Girella, Alessandro (författare)
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Guzik, Matylda N. (författare)
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Züttel, Andreas (författare)
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Milanese, Chiara (författare)
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Whitfield, Pamela (författare)
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- Noréus, Dag (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Sartori, Sabrina (författare)
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(creator_code:org_t)
- 2023
- 2023
- Engelska.
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Ingår i: Molecules. - 1431-5157 .- 1420-3049. ; 28:9
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Metal hydrides are an interesting group of chemical compounds, able to store hydrogen in a reversible, compact and safe manner. Among them, A2B7-type intermetallic alloys based on La-Mg-Ni have attracted particular attention due to their high electrochemical hydrogen storage capacity (∼400 mAh/g) and extended cycle life. However, the presence of Mg makes their synthesis via conventional metallurgical routes challenging. Replacing Mg with Y is a viable approach. Herein, we present a systematic study for a series of compounds with a nominal composition of La2-xYxNi6.50Mn0.33Al0.17, x = 0.33, 0.67, 1.00, 1.33, 1.67, focusing on the relationship between the material structural properties and hydrogen sorption performances. The results show that while the hydrogen-induced phase amorphization occurs in the Y-poor samples (x < 1.00) already during the first hydrogen absorption, a higher Y content helps to maintain the material crystallinity during the hydrogenation cycles and increases its H-storage capacity (1.37 wt.% for x = 1.00 vs. 1.60 wt.% for x = 1.67 at 50 °C). Thermal conductivity experiments on the studied compositions indicate the importance of thermal transfer between powder individual particles and/or a measuring instrument.
Ämnesord
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- hydrogen
- hydrogen storage
- metal hydrides
- compressed gas
- intermetallics
- A(2)B(7)
- La-Y-Ni
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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