In 2021, ammonia was second most produced chemical in the world. Among different ammonia synthesis routes, the most prevalent is the Haber-Bosch process. However, it has been recently demonstrated that with new types of catalysts, ammonia can be synthesized at lower pressures and temperatures. To unlock the potential of this mild condition ammonia synthesis, it is necessary to find an...
Residual stresses can affect the behavior and performance of materials and components in many ways. While experimental methods can reliably yield the residual stress state resulting from welding, they are often costly and only deliver partial information. In contrast, numerical methods allow for an analysis at any specific point in space and time. However, the accuracy of such computations...
As silicon/graphite (SiG) composites are more commonly used as the anode active material in commercial Li-ion batteries,1 the importance of investigations of the (de-)lithiation behavior of the blended anodes grows. In this study, the charge redistribution between graphite and silicon was investigated in graphite-NMC 622 and SiG (~20 wt.-% Si) – NMC 622 bilayer pouch cells using in situ and...
The prediction of material behavior following non-proportional load paths is still a major challenge in forming technology. In-situ synchrotron experiments are used to investigate the material behavior of a microalloyed and a dual-phase steel after different pre-strain levels and directional changes. It is shown that the material behavior is strongly dependent on the pre-forming level and the...
The loss of Li inventory is a common aging mechanism in Li-ion batteries. To better understand these underlying reversible and irreversible degradation processes in Si/graphite electrodes, depth-resolved methods need to be used to obtain information on the decomposition products of the lithium-containing electrolyte across the electrode thickness. In this work we present two Post-Mortem...
The increasing progress in developing next generation thin-film solar cells for space is shifting the focus of research towards practical implementation issues. Among the different types of next generation solar cells, in particular perovskite solar cells are gaining an increasing attention for space use. Meanwhile, first perovskite materials and devices have been tested in space. In contrast...
Polycrystalline CoNiCr-based alloys show promising properties for future high temperature applications due to their potential to achieve a high y'-volume fraction while retaining a significant processing range. The growing importance on emission reduction through innovative propulsion technologies, such as hydrogen-based aviation fuels or water-enhanced turbofans, requires research into how...
Human civilization is expected to face a huge challenge in the form of climate change in this century. One of the factors affecting this change is the use of fossil fuels, which have to be supplanted by so-called ’renewable energy sources’. Hydrogen is one of many possibilities for this energy storage, but a potent solution for storing the hydrogen is still being explored [1].
In this...
Lithium metal is considered as one of the most promising anode candidates for high-energy batteries [1]. However, safety concerns induced by the formation of Li dendrites and the high reactivity at the electrode/electrolyte, resulting in a continuous electrolyte decomposition hinder the practical application [2]. It is anticipated that the use of non-flammable inorganic solid-state...
