Electrochemical oxidation of graphite in an intermediate temperature direct carbon fuel cell based on two-phases electrolyte

► Good performance of intermediate temperature DCFC system fueled by graphite. ► Ohmic polarization is the major loss affecting DCFC based oxide-carbonate electrolyte. ► DCFC output is sensitive to the anodic gas atmosphere. ► Carbon solid-phase and CO gas-phase are both considered as fuel for DCFC at 750 °C.