Solid Oxide Fuel Cells (SOFC) running on biogas or bio-syngas promise highly efficient
and carbon neutral power generation from biomass. Recently the number of commercially
available SOFCs has increased. This paper aims to compare different available 10 cm x
10 cm SOFC types. The anode-supported SOFCs have been tested in simulated biosyngas
at moderate working temperatures. The cells have been characterized at various
temperatures and anode gas flow compositions with electrochemical impedance
spectroscopy (EIS). The recorded spectra were evaluated with distribution of relaxation
times (DRT) analysis in order to interpret the electrochemical processes that limit the
performance of the cells. The results of the different SOFC types have been compared
with each other and their respective strength and weakness are discussed.
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