Determination of hydrogen diffusion coefficient in metal hydride electrodeby modified Warburg impedance

Authors
Yuan, XX Xu, NX
Citation
Xx. Yuan et Nx. Xu, Determination of hydrogen diffusion coefficient in metal hydride electrodeby modified Warburg impedance, J ALLOY COM, 329(1-2), 2001, pp. 115-120
Citations number
29
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN journal
09258388 → ACNP
Volume
329
Issue
1-2
Year of publication
2001
Pages
115 - 120
Database
ISI
SICI code
0925-8388(20011114)329:1-2<115:DOHDCI>2.0.ZU;2-5
Abstract
Hydrogen diffusion coefficients in MINi3.75Co0.65Mn0.4Al0.2, metal hydride electrode as a function of depth of discharge (DOD) and temperature were ev aluated with modified Warburg impedance which describes more precisely the practical diffusion behavior. It was found that hydrogen diffusion coeffici ent in this electrode increases with the increase in DOD at ambient tempera ture, and for this electrode with 50% DOD, hydrogen diffusion coefficient i ncreases with the increase of temperature and the activation energy for hyd rogen diffusion in it is 35 kJ mol(-1). (C) 2001 Elsevier Science B.V. All rights reserved.