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Materials 2013, 6(10), 4654-4674;

Thermodynamic Tuning of Mg-Based Hydrogen Storage Alloys: A Review

1,2,* , 1,2
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, Guangzhou 510641, China
Author to whom correspondence should be addressed.
Received: 28 August 2013 / Revised: 26 September 2013 / Accepted: 12 October 2013 / Published: 18 October 2013
(This article belongs to the Special Issue Hydrogen Storage Alloys)
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Mg-based hydrides are one of the most promising hydrogen storage materials because of their relatively high storage capacity, abundance, and low cost. However, slow kinetics and stable thermodynamics hinder their practical application. In contrast to the substantial progress in the enhancement of the hydrogenation/dehydrogenation kinetics, thermodynamic tuning is still a great challenge for Mg-based alloys. At present, the main strategies to alter the thermodynamics of Mg/MgH2 are alloying, nanostructuring, and changing the reaction pathway. Using these approaches, thermodynamic tuning has been achieved to some extent, but it is still far from that required for practical application. In this article, we summarize the advantages and disadvantages of these strategies. Based on the current progress, finding reversible systems with high hydrogen capacity and effectively tailored reaction enthalpy offers a promising route for tuning the thermodynamics of Mg-based hydrogen storage alloys. View Full-Text
Keywords: Mg-based hydrogen storage alloys; thermodynamics; alloying; nanostructuring; changing reaction pathway Mg-based hydrogen storage alloys; thermodynamics; alloying; nanostructuring; changing reaction pathway

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Zhu, M.; Lu, Y.; Ouyang, L.; Wang, H. Thermodynamic Tuning of Mg-Based Hydrogen Storage Alloys: A Review. Materials 2013, 6, 4654-4674.

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