Extensive research activities in the field of renewable energies and the expansion of volatile generation capacities are increasingly focusing on the use of hydrogen as the energy carrier of the future. There are various approaches to utilizing the chemically bound energy of hydrogen. One possible technology is the solid oxide cell, which can be operated both as a fuel cell and as an electrolysis cell, depending on the direction of the current, thus temporarily storing the electricity. In this master thesis, solid oxide cells with a rare earth nickelate compound as active layer in air electrodes are investigated. Furthermore, a new approach for the preparation of the current collector layer using a pore-forming agent, which has not previously been used at the Chair of Physical Chemistry, is tested to increase the cell performance. For this purpose, symmetrical cells and a full cell are prepared and characterized at 800°C. Electrochemical impedance spectroscopy and scanning electron microscopy of selected cells are used for this purpose. In addition, X-ray diffraction analysis is used to characterize the crystal structure. The results clearly show that the sintering program is largely responsible for the adhesion between the substrate and the screen printing layer. Air electrodes with one active and one current collector layer show the best cell performance. In addition, various cell configurations, different sintering programs as well as various current collector and active layer configurations were tested. It was found that a sintering temperature of 1200°C and a low proportion of the pore former delivered the best results in impedance spectroscopy. The findings from the tests with the symmetrical cells were transferred to an anode-supported full cell, which was tested in fuel cell mode. In future, the used rare earth nickelate is investigated further and causes for its relatively high impedance values will have to be found. The first steps were implemented with conductivity measurements of the material of the active layer, which showed that the performance is not limited by too low conductivity. Further measures could include a series of tests with variations in the sintering parameters and detailed investigations of the microstructure and the interface to the electrolyte.