The prospect of MgH2 as a solid state hydrogen storage material has been reviewed in this chapter. Introducing the global perspective of hydrogen energy research and the status of MgH2 as a solid storage hydrogen media, the basic thermodynamics of the Mg-H system and the structure of different phases of MgH2 are discussed followed by a brief account of the physical properties of tetragonal MgH2 relevant to its role as hydrogen storage material. The mode of the review is set to highlight the limitation of the information on the physical properties and the controversy among the reports, especially on the electronic structure and the nature of bonding in MgH2. The chapter includes a collection of reports on the effect of ball milling in various aspects of the hydrogen sorption mechanism. Some selective complex hydride systems are summarized where combinations of transition elements and/or hydride compounds including amide, borohydride and alanates are added to MgH2 to enhance the hydrogen sorption properties of the systems. Remaining challenges in understanding some important fundamental characteristics, along with the technical difficulties incharacterizing them, are emphasized to outline a possible road map of future research on MgH2 as a hydrogen storage material.
|Title of host publication||Energy Storage|
|Publisher||Nova Science Publishers, Inc.|
|Number of pages||37|
|Publication status||Published - 2012 Aug 1|
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