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Développement et optimisation d’une unité de stockage de l’hydrogène sur hydrures métalliques utilisée dans les systèmes stationnaires de piles à combustible

Domenii publicaţii > Chimie + Tipuri publicaţii > Tezã de doctorat (nepublicatã)

Autori: Vasile Iosub

Editorial: Université Paris XII, 2004.


The work has started with a thorough study of tbe bibliography on the metal hydrides application as hydrogen storage materials in solid gas process. This study has made possible to determine two families of intermetallic compounds able to reach the needs of the specific application: the AB5-type compounds with MmNi5-xSnx compositions (Mm stands for mischmetal, a mixture of La, Ce, Nd and Pr) as well as tbe AB2-type compounds with Zr1-pTipMn2-r-sNirVs compositions. In a second time we have tried to optimise hydrogen absorption properties by modifying the alloy composition and structure. Moreover, a study of the kinetics and ageing during cycling was made. From the experimental results, new relations composition — structure — thermodynamic properties have been determined in order to adapt other types of hvdrogen storage materials to the specifications.

Cuvinte cheie: hydrogen storage, metal hydrides, intermetallic compounds, fuel cell