Degradation Properties of Hydrogen Storage Alloys and Change of Microstructure during the Degradation

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Ti-Cr-V alloys with body-centered cubic (BCC) structure were investigated on hydrogen absorbing-desorbing cyclic durability by using H2 without and with several concentrations of CO (Hereafter, they are described as pure H2 and n ppm CO, respectively.). The alloy which offers the excellent durability except the early stages of cyclic absorption-desorption under pure H2 atmosphere gave good durability also in a flow of low concentration of CO. However, capacities’ degradation curves under high CO concentration reflected that duration and concentration effects competed with each other. The results suggests to be able to express each degradation by intrinsic and extrinsic factors as an aggregation of several prime functions.

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Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

1613-1616

DOI:

10.4028/www.scientific.net/MSF.561-565.1613

Citation:

H. Tanaka et al., "Degradation Properties of Hydrogen Storage Alloys and Change of Microstructure during the Degradation", Materials Science Forum, Vols. 561-565, pp. 1613-1616, 2007

Online since:

October 2007

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$35.00

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[1] [2] [3] [4] [5] [6] [7] [8] 300 400 500 600 700 800 900 1000 Temperature, T /K Ion current, I /(x 10 2 pA/g) H2 10ppm CO/H2.

[1] [2] [3] [4] [5] [6] [7] [8] 300 400 500 600 700 800 900 1000 Temperature, T /K Ion current, I /(x 102 pA/g) H2 10ppm CO/H2 CO H2 Fig. 4 TPD profiles of original (solid lines) and degraded (broken lines) Ti1. 01Cr1. 49V0. 30.

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