The Technion Internal Combustion Engines Lab has previously developed a Combined Electro-Thermo-Chemical Cycle (CETC), which is an innovative hybrid propulsion cycle comprising a solid-oxide fuel cell (SOFC), an internal combustion engine (ICE), and a reformer for thermochemical recuperation of waste heat and onboard production of hydrogen-rich reformate. SOFCs are recognized for their outstanding fuel flexibility and high efficiency in converting fuel chemical energy into electrical work. In this research, both numerical simulations and experimental research were conducted to characterize the performance of the SOFC and the reformer aiming at CETC characteristics improvement.