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Title: Metastable Metal Hydrides for Hydrogen Storage

Abstract

The possibility of using hydrogen as a reliable energy carrier for both stationary and mobile applications has gained renewed interest in recent years due to improvements in high temperature fuel cells and a reduction in hydrogen production costs. However, a number of challenges remain and new media are needed that are capable of safely storing hydrogen with high gravimetric and volumetric densities. Metal hydrides and complex metal hydrides offer some hope of overcoming these challenges; however, many of the high capacity “reversible” hydrides exhibit a large endothermic decomposition enthalpy making it difficult to release the hydrogen at low temperatures. On the other hand, the metastable hydrides are characterized by a low reaction enthalpy and a decomposition reaction that is thermodynamically favorable under ambient conditions. The rapid, low temperature hydrogen evolution rates that can be achieved with these materials offer much promise for mobile PEM fuel cell applications. However, a critical challenge exists to develop new methods to regenerate these hydrides directly from the reactants and hydrogen gas. This spotlight paper presents an overview of some of the metastable metal hydrides for hydrogen storage and a few new approaches being investigated to address the key challenges associated with these materials.

Authors:
 [1]
  1. Department of Sustainable Energy Technologies, Brookhaven National Laboratory, Upton, NY 11973, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1198265
Grant/Contract Number:  
AC02-98CH1-886
Resource Type:
Published Article
Journal Name:
ISRN Materials Science
Additional Journal Information:
Journal Name: ISRN Materials Science Journal Volume: 2012; Journal ID: ISSN 2090-6099
Publisher:
Hindawi (International Scholarly Research Network)
Country of Publication:
Country unknown/Code not available
Language:
English

Citation Formats

Graetz, Jason. Metastable Metal Hydrides for Hydrogen Storage. Country unknown/Code not available: N. p., 2012. Web. doi:10.5402/2012/863025.
Graetz, Jason. Metastable Metal Hydrides for Hydrogen Storage. Country unknown/Code not available. https://doi.org/10.5402/2012/863025
Graetz, Jason. Thu . "Metastable Metal Hydrides for Hydrogen Storage". Country unknown/Code not available. https://doi.org/10.5402/2012/863025.
@article{osti_1198265,
title = {Metastable Metal Hydrides for Hydrogen Storage},
author = {Graetz, Jason},
abstractNote = {The possibility of using hydrogen as a reliable energy carrier for both stationary and mobile applications has gained renewed interest in recent years due to improvements in high temperature fuel cells and a reduction in hydrogen production costs. However, a number of challenges remain and new media are needed that are capable of safely storing hydrogen with high gravimetric and volumetric densities. Metal hydrides and complex metal hydrides offer some hope of overcoming these challenges; however, many of the high capacity “reversible” hydrides exhibit a large endothermic decomposition enthalpy making it difficult to release the hydrogen at low temperatures. On the other hand, the metastable hydrides are characterized by a low reaction enthalpy and a decomposition reaction that is thermodynamically favorable under ambient conditions. The rapid, low temperature hydrogen evolution rates that can be achieved with these materials offer much promise for mobile PEM fuel cell applications. However, a critical challenge exists to develop new methods to regenerate these hydrides directly from the reactants and hydrogen gas. This spotlight paper presents an overview of some of the metastable metal hydrides for hydrogen storage and a few new approaches being investigated to address the key challenges associated with these materials.},
doi = {10.5402/2012/863025},
journal = {ISRN Materials Science},
number = ,
volume = 2012,
place = {Country unknown/Code not available},
year = {Thu Dec 20 00:00:00 EST 2012},
month = {Thu Dec 20 00:00:00 EST 2012}
}

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