On the chemical state and distribution of Zr- and V-based additives in reactive hydride composites
Ulrike Bösenberg,Ulla Vainio,P.K. Pranzas,J. M. Bellosta von Colbe,G. Goerigk,E. Welter,M. Dornheim,A. Schreyer,R. Bormann +8 more
TLDR
To understand the effect of transition-metal-based additives added to reactive hydride composites, the chemical state and changes during the reaction as well as the microstructural distribution were investigated using x-ray absorption near-edge structure (XANES) spectroscopy and anomalous small-angle x-rays scattering (ASAXS).Abstract:
Reactive hydride composites (RHCs) are very promising hydrogen storage materials for future applications due to their reduced reaction enthalpies and high gravimetric capacities. At present, the materials' functionality is limited by the reaction kinetics. A significant positive influence can be observed with addition of transition-metal-based additives. To understand the effect of these additives, the chemical state and changes during the reaction as well as the microstructural distribution were investigated using x-ray absorption near-edge structure (XANES) spectroscopy and anomalous small-angle x-ray scattering (ASAXS). In this work, zirconium- and vanadium-based additives were added to 2LiBH4–MgH2 composites and 2LiH–MgB2 composites and measured in the vicinity of the corresponding absorption edge. The measurements reveal the formation of finely distributed zirconium diboride and vanadium-based nanoparticles. The potential mechanisms for the observed influence on the reaction kinetics are discussed.read more
Citations
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Journal ArticleDOI
Recent Progress in Metal Borohydrides for Hydrogen Storage
TL;DR: A review of metal borohydrides with high hydrogen density can be found in this article, with a focus on the fundamental dehydrogenation and rehydrogenation properties.
Journal ArticleDOI
Nanostructured Metal Hydrides for Hydrogen Storage.
Andreas Schneemann,James L. White,ShinYoung Kang,Sohee Jeong,Liwen F. Wan,Eun Seon Cho,Eun Seon Cho,Tae Wook Heo,David Prendergast,Jeffrey J. Urban,Brandon C. Wood,Mark D. Allendorf,Vitalie Stavila +12 more
TL;DR: This review aims to understand and explain the underpinnings of the innovative concepts and strategies developed over the past decade to tune the thermodynamics and kinetics of hydrogen storage reactions, with several promising directions and strategies that could lead to the next generation of solid-state materials for hydrogen storage applications.
Journal ArticleDOI
Metal borohydrides and derivatives – synthesis, structure and properties
Mark Paskevicius,Lars H. Jepsen,Pascal Schouwink,Radovan Černý,Dorthe Bomholdt Ravnsbæk,Yaroslav Filinchuk,Martin Dornheim,Flemming Besenbacher,Torben R. Jensen +8 more
TL;DR: It is demonstrated that there is still room for discovering new combinations of light elements including boron and hydrogen, leading to complex hydrides with extreme flexibility in composition, structure and properties, as well as new synthetic strategies along with structural, physical and chemical properties.
Journal ArticleDOI
Tailoring properties of borohydrides for hydrogen storage: A review
Line H. Rude,Thomas K. Nielsen,Dorthe Bomholdt Ravnsbæk,Ulrike Bösenberg,Morten B. Ley,Bo Richter,Lene M. Arnbjerg,Martin Dornheim,Yaroslav Filinchuk,Flemming Besenbacher,Torben R. Jensen +10 more
TL;DR: In this article, a review of light metal boron-based hydrides is presented along with new approaches for improving kinetic and thermodynamic properties: (i) anion substitution, (ii) reactive hydride composites and (iii) nanoconfinement.
Journal ArticleDOI
Role of additives in LiBH4-MgH2 reactive hydride composites for sorption kinetics
Ulrike Bösenberg,Jinwoo Kim,Daniel Gosslar,N. Eigen,Torben R. Jensen,J. M. Bellosta von Colbe,Y. Zhou,M. Dahms,Dong Hoe Kim,Robert Günther,Young Whan Cho,Kyu Hwan Oh,Thomas Klassen,Rüdiger Bormann,Rüdiger Bormann,Martin Dornheim +15 more
TL;DR: In this paper, the influence of additives on reaction kinetics and microstructure refinement in LiBH4-MgH2 composites is investigated in detail, and the rate-limiting processes during the reactions are obtained by comparison of the measured reaction kinematics with simulations with one specific rate limiting process.
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