The Thermodynamic Way of Assessing Reversible Metal Hydride Volume Expansion: Getting a Grip on Metal Hydride Formation Overpotential

08 February 2021, Version 4
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The relative volume expansion of reversible metal hydride crystals upon formation is determined by means of the van’t Hoff reaction entropy and STP ideal gas parameters, the development of this approach leads to a general method for calculating metal hydride single-crystal density. These results allow highlighting the pressure requirement to hydride phase formation, shown by the example of Ti-NaAlH4.

Keywords

metal hydride
Reversible Hydrogen Storage Properties
molar volume results
sodium alanate
Thermodynamic Modeling
Thermodynamic tailoring
Equilibrium thermodynamics
Reversible Hydrogen Storage Capacity
volume expansion ratios
reaction comparison approaches
reversibility
hydrogen storage
molar volume values
metal hydride crystal density
molar volume pressure dependency

Supplementary weblinks

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