Abstract
This paper is a collection of selected contributions of the 1st International Workshop on Mechanochemistry of Metal Hydrides that was held in Oslo in May 2018. In this paper, the recent developments in the use of mechanochemistry to synthesize and modify metal hydrides are reviewed. A special emphasis is made on new techniques beside the traditional way of ball milling. High energy milling, ball milling under hydrogen reactive gas, cryomilling and severe plastic deformation techniques such as High-Pressure Torsion (HPT), Surface Mechanical Attrition Treatment (SMAT) and cold rolling are discussed. The new characterization method of in-situ X-ray diffraction during milling is described.
Highlights
Since the pioneering work of Benjamin, mechanochemical treatment has been extensively used to produce new materials or to enhance properties of existing alloys [1,2]
All aforementioned investigations indicate that pressure induced transitions as well as composition are of major importance, in particular for high-energy ball milling
Milling at low temperature or under hydrogen enables the synthesis of new materials in a relatively easy way
Summary
Since the pioneering work of Benjamin, mechanochemical treatment has been extensively used to produce new materials or to enhance properties of existing alloys [1,2]. From an historical point of view, metal or complex hydrides for energy storage applications were synthesized by solvent-based or by direct solid–gas hydrogenation reactions. These techniques are important, during the past two decades, advanced mechanochemistry has become increasingly dominating. In the past two decades, a wide range of complex metal hydrides have been synthesized using mechanochemistry [19] These compounds are very interesting new classes of energy materials for batteries and hydrogen storage applications [20,21,22]. The effect on metal hydrides synthesis and performances of various mechanochemical techniques are presented and discussed
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