Issue 9, 2011
From the journal:

Energy & Environmental Science

Chemical hydrogenstorage: ‘material’ gravimetric capacity versus ‘system’ gravimetric capacity

Umit B. Demirci*ab  and  Philippe Mieleb  

* Corresponding authors

a Université Lyon 1, CNRS, UMR 5615, Laboratoire des Multimatériaux et Interfaces, 43 boulevard du 11 Novembre 1918, Villeurbanne, France
E-mail: umit.demirci@univ-lyon1.fr
Fax: +33 (0)4 72 44 06 18
Tel: +33 (0)4 67 43 12 05

b Institut Européen des Membranes, Université Montpellier 2, CNRS, UMR 5253, Laboratoire des Agrégats Interfaces et Matériaux pour l'Energie, Place Eugène Bataillon, Montpellier Cedex 5, France
E-mail: umit.demirci@iemm.univ-montp2.fr, philippe.miele@iemm.univ-montp2.fr
Fax: +33 (0)4 67 14 91 19
Tel: +33 (0)4 67 14 91 60

Abstract

Chemical hydrogen storage materials (CHSMs), owing to their high hydrogen content, are presented as having high potential to achieve high gravimetric hydrogen storage capacities in the prospect of technological applications (e.g. vehicle). However, this raises two questions. Is the storage capacity viewed at the material level or at the system level? Do we talk about absolute, excess or net capacities? Being exact in the terms used is all important so the US Department of Energy has set well-defined, precise technical requirements for vehicle application at the system level. This Minireview focuses on the terms that have been used in the open literature to present the storage capacities of the CHSMs. It stands out, through several typical cases, that the terms are generally misused and mislead the reader on the real capacities. For instance, the material level and the system level are often lumped together. Herein, we re-define the much-used terms and expressions, and propose a set of expressions to systematically use in order to avoid any future misuse, misleading terms and misunderstanding.

Graphical abstract: Chemical hydrogen storage: ‘material’ gravimetric capacity versus ‘system’ gravimetric capacity

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Article information

DOI
https://doi.org/10.1039/C1EE01612A
Article type
Minireview
Submitted
03 May 2011
Accepted
09 Jun 2011
First published
01 Aug 2011

Energy Environ. Sci., 2011,4, 3334-3341

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Chemical hydrogen storage: ‘material’ gravimetric capacity versus ‘system’ gravimetric capacity

U. B. Demirci and P. Miele, Energy Environ. Sci., 2011, 4, 3334 DOI: 10.1039/C1EE01612A

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