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Lithium-ion batteries are widely used as energy storage devices due to their high energy density and versatile applicability. Their dissemination in the mobility sector is presently limited by their high manufacturing costs. [...]

We have systematically investigated the effect of rare earth erbium (Er3+) substitution on the structural, ferroelectric, piezoelectric, and dielectric behaviour of the morphotropic phase boundary lead-free piezoelectric 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 (NBT-6BT). We found that the system shows very good thermal stability of energy density, discharge efficiency, and dielectric permittivity. [...]

We present a study that combines polarized and unpolarized neutrons to derive the magnetic structure of the swedenborgite compound CaBa(Co3Fe)O7. Integrated intensities from a standard neutron diffraction experiment and polarization matrices from spherical neutron polarimetry have been simultaneously analyzed revealing a complex order, which differs from the usual spin configurations on a kagome lattice. [...]

This thesis gives an insight into thin coatings consisting of polyelectrolyte multilayers, polyelectrolyte brushes and Halloysite nanotubes. Thin coatings are able to modify surfaces without affecting the underlying substrate. [...]