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Thermodynamic assessment of the NaH <-> Na(3)AlH(6)<-> NaAlH(4) hydride system

Author:
Lee, Byeong-Moon  Jang, Je-Wook  Shim, Jae-Hyeok  Cho, Young Whan  Lee, Byeong-Joo  


Journal:
JOURNAL OF ALLOYS AND COMPOUNDS


Issue Date:
2006


Abstract(summary):

Thermodynamic properties of hydrides, NaH, Na(3)AlH(6) and NaAlH(4) which can be a promising candidate for a hydrogen storage material system, were critically assessed by analyzing available piecewise literature information on thermodynamic properties using the CALPHAD method. Through the assessment, a critical evaluation on the reliability of individual literature data on thermodynamic properties of the NaH-Na(3)AlH(6)-NaAlH(4) hydride system could be made, and a self-consistent thermodynamic description could be obtained. The finally assessed thermodynamic description can reproduce various thermodynamic properties of individual hydrides and phase equilibria among hydrides in reasonable agreement with relevant experimental and high-level calculation data, and provide a reference data that can be used for comparison with high-level calculations and for further thermodynamic assessments of higher order systems. (c) 2006 Elsevier B.V. All rights reserved.


Page:
370---375


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