A way to reduce the world’s reliance on conventional fuels is to obtain cost-competitive alternatives to convert and store energy. This could be done by implementing cheap storage devices, such as Na-Ion batteries , which are the focus of our investigations. During the first part of the project, major attention was dedicated to the fabrication of Prussian blue analog-based batteries, which are considered a good choice for stationary energy storage devices. However, there are still many unknowns related to this technology . Neutron scattering and imaging allow performing operando experiments during charge-discharge without any repercussions on the battery’s functional properties. Neutrons are well suited to measure light elements making them a viable probe to study morphology and composition changes as well as ionic transport processes in Na-ion batteries. We have performed operando tomographic studies of the degradation processes, hereby imaging the dendrite growth process, to investigate the effect of cycling on the morphology and long-term stability of the cell. Dendrite formation and electrolyte degradations are two of the most predominant failure mechanisms in these devices . Thus our studies are highly relevant for getting an insight into the key processes the technology is based on.
 A. Mauger, et al., Materials 2020, 13, 3453.
 Bingxing Xie, et al., Coordination Chemistry Reviews 2022, 460, 214478.
 Huan Shi, et al., Chem. Rec. 2022, 22, e202200112.