Stability of LaNi5-xSnx cycled in hydrogen

被引：57

作者：

Borzone, E. M. ^{[1
]}

Blanco, M. V. ^{[1
]}

Baruj, A. ^{[1
,2
]}

Meyer, G. O. ^{[1
,2
]}

机构：

[1] Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 16期

关键词：

Hydride; ABS; Degradation; Purification; Structure; ABSORPTION-DESORPTION; METAL-HYDRIDES; LANI4.8SN0.2; DEGRADATION; ALLOYS; PERFORMANCE; LANI5-YSNY; SURFACE;

D O I：

10.1016/j.ijhydene.2013.12.031

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work we study the effect of cycling in hydrogen with a purity grade 4.5 of six alloys belonging to the LaNi5-xSnx 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 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. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：8791 / 8796

页数：6

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