Effects of Thermal Cycling on the Physical Properties of VH x *

Autor:	F. E. Lynch, Robert C. Bowman, Dhanesh Chandra, B. Fultz, R. W. Marmaro, J. S. Cantrell, C. H. Luo
Rok vydání:	1993
Předmět:	Materials science Hydride Analytical chemistry Vanadium chemistry.chemical_element Temperature cycling Metal Hydrogen storage chemistry Transmission electron microscopy Desorption visual_art visual_art.visual_art_medium Physical and Theoretical Chemistry Absorption (electromagnetic radiation)
Zdroj:	Zeitschrift für Physikalische Chemie. 181:269-273
ISSN:	2196-7156 0942-9352
DOI:	10.1524/zpch.1993.181.part_1_2.269
Popis:	A thousand thermal cycles of vanadium hydride across the β-γ mixed phase region decreased the reversible hydrogen storage capacity and increased the absorption/desorption pressure hysteresis ratio. Thermal cycling also produced a large increase in hydride surface area. Nevertheless, X-ray diffraction and transmission electron microscopy showed the measured crystalline size to be larger after the 1000 cycles than for activated materials. These results were not anticipated from the behavior exhibited by other metal hydrides.
Databáze:	OpenAIRE
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