Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7719542 | International Journal of Hydrogen Energy | 2014 | 6 Pages |
Abstract
In this work we study the effect of cycling in hydrogen with a purity grade 4.5 of six alloys belonging to the LaNi5âxSnx family for 0 â¤Â x â¤Â 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 LaNi5 and LaNi4.55Sn0.45 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 LaNi5). Absorption characteristic times do not suffer important changes in either case. Desorption is gradually retarded when Sn content is higher than 0.4 at.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
E.M. Borzone, M.V. Blanco, A. Baruj, G.O. Meyer,