Ph.D. Theses

The global transition toward CO2-neutral energy systems requires a significant expansion of hydrogen technologies, with solid oxide electrolysis cells (SOECs) offering a highly efficient route for hydrogen production via high-temperature electrolysis. However, despite their superior efficiency, SOECs remain technologically less mature than low-temperature alternatives such as alkaline or proton exchange membrane electrolyzers. [...]

Aging populations worldwide are widening the gap between lifespan and healthspan, underscoring theneed for early, scalable markers of organismal health and intervention targets before overt clinicaldecline. Hand grip strength (HGS) has emerged as a highly reliable and low-cost predictor of systemwidefactors such as frailty, cognitive decline, and mortality. [...]

The conversion of electrical energy into a chemical energy carrier in the form of hydrogen, carbon monoxide and synthesis gas can be achieved with high efficiency by using the solid oxide electrolysis technology. However, long term degradation issues, especially of the fuel electrode remain a challenge that must be resolved. [...]

This work focuses on the analysis of the performance and degradation behavior of Ni-cermet and Ni-free perovskite materials for the fuel gas electrode under steam, CO$_2$, and co-electrolysis conditions. Degradation tests of commercial solid oxide cells with a Ni-8YSZ fuel electrode were carried under a constant current density of $-1$ A $\cdot$ cm$^{-2}$ for 1000 h. [...]