1 An alloy LaMg 2 Ni K. Yvon Tateshina, 16-19 March 2003 IEA Task 17 Workshop G. Renaudin, L....
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Transcript of 1 An alloy LaMg 2 Ni K. Yvon Tateshina, 16-19 March 2003 IEA Task 17 Workshop G. Renaudin, L....
1
An alloyLaMg2Ni
K. Yvon Tateshina, 16-19 March 2003 IEA Task 17 Workshop
G. Renaudin, L. Guénée and K. Yvon,J. Alloys Comp. 350 (2003) 145
Hydrogenation<200°C, <8bar
2K. Yvon Tateshina, 16-19 March 2003 IEA Task 17 Workshop
A hydrideLaMg2NiH7
G. Renaudin, L. Guénée and K. Yvon,J. Alloys Comp. 350 (2003) 145
Hydrogenation<200°C, <8bar
3K. Yvon Tateshina, 16-19 March 2003 IEA Task 17 Workshop
G. Renaudin, N. Clayton and K. Yvon
An alloyLaMg2Ni
Hydrogenation<200°C, <8bar
4K. Yvon Tateshina, 16-19 March 2003 IEA Task 17 Workshop
G. Renaudin, N. Clayton and K. Yvon
A hydrideLaMg2NiH7
Resistance changes its characterand increase by ~106 times
5
Destabilization of metal hydride complexes and theoretical modeling
Tateshina, 16-19 March 2003IEA Task 17 Workshop
Laboratory of Crystallography, University of Geneva
Yaroslav Filinchuk[for Prof. Klaus Yvon]
6K. Yvon Tateshina, 16-19 March 2003 IEA Task 17 Workshop
Alanates
Dopped and undopped NaAlH4 and NaAlD4
• The samples are activated upon dopping; • Raman spectroscopic study of the dopped samples (opaque) is impossible; • Peak breadening is observed by IR-spectroscopy (as well as by NMR – prof. Jensen) for dopped samples;
• X-ray powder patterns show no peak broadening (no inhomogeneity) for dopped samples.
11K. Yvon Tateshina, 16-19 March 2003 IEA Task 17 Workshop
kT
U
ecbTaT
LiBH4 => U = 3.7 Kcal/mole
NaBH4 => U = 2.9 Kcal/mole
CsBH4 => U = 1.9 Kcal/moleKBH4 => U = 2.2 Kcal/mole
S. Gomes, H. Hagemann, G. Renaudin and K. Yvon