A5089050628- Hydrogen Storage and Materials
- Crystallization and Solubility Studies
- Inorganic Chemistry and Materials
- X-ray Diffraction in Crystallography
- Inorganic Fluorides and Related Compounds
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Ammonia Synthesis and Nitrogen Reduction
- Crystallography and molecular interactions
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- Boron and Carbon Nanomaterials Research
- Hybrid Renewable Energy Systems
- Metal-Organic Frameworks: Synthesis and Applications
Aarhus University
2020-2025
Abstract Intense literature and research efforts have focussed on the exploration of complex hydrides for energy storage applications over past decades. A focus was dedicated to determination their thermodynamic hydrogen properties, due high gravimetric volumetric capacities, but application has been limited because harsh working conditions reversible release uptake. The present review aims at appraising recent advances different hydride systems, coming from proficient collaborative...
Abstract The development of efficient storage systems is one the keys to success energy transition. There are many ways store energy, but among them, electrochemical particularly valuable because it can electrons produced by renewable energies with a very good efficiency. However, solutions currently available on market remain unsuitable in terms capacity, recharging kinetics, durability, and cost. Technological breakthroughs therefore expected meet growing need for storage. Within framework...
Solid-state magnesium electrolytes may pave the way for novel types of rechargeable, sustainable, and cheap batteries with high volumetric gravimetric capacities. There are, however, currently no solid-state that fulfill requirements battery applications. Here, we present synthesis, structure, properties six new methylamine borohydride compounds, α- β-Mg(BH4)2·6CH3NH2, Mg(BH4)2·3CH3NH2, α-, α′- β-Mg(BH4)2·CH3NH2. The β-Mg(BH4)2·CH3NH2 polymorph displays a record Mg2+ ionic conductivity...
The chemistry of metal borohydrides and their derivatives has expanded signficantly during the past decade involving new compositions, structures, diversity associated properties. Here we provide an overview interesting results mainly from few years, discussed relative to previously published results. A range synthesis strategies been developed obtain pure samples, which allowed very detailed structural, physical, chemical investigations. short mono- dimetallic is provided, including a...
Solid-state calcium batteries can potentially contribute to future renewable energy storage systems, however the discovery of electrolytes with sufficiently high Ca2+ conductivity at ambient conditions is a challenge. Here we present mechanochemical synthesis and properties five different urea tetrahydridoborate compositions as well three crystal structures, Ca(BH4)2·xCO(NH2)2, x = 2, 4, 6. The orthorhombic structure Ca(BH4)2·2CO(NH2)2 consists dinuclear molecular units,...
Solid-state batteries can potentially provide higher energy and power densities than conventional lithium-ion through the utilization of a solid electrolyte instead liquid electrolyte. Here we present three cyclopropylamine magnesium borohydride compounds as potential solid-state electrolytes: tricyclopropylamine borohydride, Mg(BH4)2·3(CH2)2CHNH2, dicyclopropylamine Mg(BH4)2·2(CH2)2CHNH2, monocyclopropylamine Mg(BH4)2·(CH2)2CHNH2. Additionally, two nanocomposites,...
New materials for the next generation of electrochemical energy storage devices such as batteries are extreme importance. Here we investigate structure, ionic conductivity and thermal properties isopropylamine magnesium borohydride based composites with different compositions, Mg(BH4)2·x(CH3)2CHNH2, x = 0.5, 0.9, 1.25, 1.5, 1.75, 2.5, 3.1. Three new compounds discovered, 1, 2, 3 monoclinic structure Mg(BH4)2·2(CH3)2CHNH2 (P21/c) is investigated in detail. This consists neutral complexes...
Abstract An increased electrification of society calls for a revolution battery technologies to further improve energy densities, safety and reduce dependencies on critical raw materials. Here we present new type fast magnesium electrolytes all solid-state batteries created as solid solutions two other Mg 2+ ionic conductors, Mg(BH 4 ) 2 ∙ NH 3 CH . However, the different ligands introduce stacking faults in structures solutions, which are eliminated upon heating T > 40 °C. The appear...
Reorientational dynamics in solid electrolytes can significantly enhance the ionic conductivity, and understanding these facilitate rational design of improved electrolytes. Additionally, recent investigations on metal hydridoborate-based have shown that addition a neutral ligand also positive effect conductivity. In this study, we investigate monomethylamine magnesium borohydride (Mg(BH
The discovery of new inorganic magnesium electrolytes may act as a foundation for the rational design novel types solid-state batteries. Here we investigated type organic-inorganic metal hydride, isopropylamine borohydride, Mg(BH4)2∙(CH3)2CHNH2, with hydrophobic domains in solid state, which appear to promote fast Mg2+ ionic conductivity. A synthetic strategy was designed by combination solvent-based methods and mechanochemistry. orthorhombic structure Mg(BH4)2∙(CH3)2CHNH2 solved ab initio...
Ammine metal borohydrides show large compositional and structural diversity, have been proposed as candidates for solid-state ammonia hydrogen storage well fast cationic conductors. Here, we report the synthesis method of ammine barium borohydrides, Ba(BH4)2·xNH3 (x = 1, 2). The two new compounds were investigated with time-resolved temperature-varied in situ synchrotron radiation powder X-ray diffraction, thermal analysis, infrared spectroscopy photographic analysis. compound Ba(BH4)2·2NH3...