Stability of LaNi5-xSnx cycled in hydrogen
In this work we study the effect of cycling in hydrogen with a purity grade 4.5 of six alloys belonging to the LaNi<inf>5-x</inf>Sn<inf>x</inf> family for 0 ≤ x ≤ 0.5. Measurements consist in the alternate repetition of absorption reactions at a temperature of 316 K and an in...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/414361 |
| Acceso en línea: | http://hdl.handle.net/10261/414361 https://api.elsevier.com/content/abstract/scopus_id/84900426256 |
| Access Level: | acceso abierto |
| Palabra clave: | AB5 Degradation Hydride Purification Structure |
| Sumario: | In this work we study the effect of cycling in hydrogen with a purity grade 4.5 of six alloys belonging to the LaNi<inf>5-x</inf>Sn<inf>x</inf> family for 0 ≤ x ≤ 0.5. Measurements consist in the alternate repetition of absorption reactions at a temperature of 316 K and an initial pressure of 800 kPa, each followed by a desorption reaction at the same temperature and a maximum backpressure of 2 kPa. All samples present good stability, preserving at least 98% of their initial capacity after 100 cycles. Samples with composition LaNi<inf>5</inf> and LaNi<inf>4.55</inf>Sn<inf>0.45</inf> were subjected to 1000 cycles, after which we observe a higher stability from the Sn-containing alloy (96% of the initial capacity preserved versus 92% for LaNi<inf>5</inf>). Absorption characteristic times do not suffer important changes in either case. Desorption is gradually retarded when Sn content is higher than 0.4 at. © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. |
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