A study on the electrochemical performance of 100-cm2 class direct carbon-molten carbonate fuel cell (DC-MCFC). (27th April 2015) - Choi, Sun Hee
Abstract: We study the effect of various operating parameters such as temperature, molten carbonate/carbon ratio, and the type of Ni thin layer inserted between the matrix (electrolyte support) and carbon green sheet on the electrochemical performance of a 100-cm 2 class direct carbon-molten carbonate fuel cell (DC-MCFC). In addition, we attempt to understand the oxidation behavior of carbon in the wet carbon anode (the composite of carbon and molten carbonates) of the DC-MCFC. We find that in the DC-MCFC, CO is produced via a two-electron transfer reaction [C(s) + CO 3 − 2 → CO2 (g) + CO(g) + 2e − ] and is further oxidized with CO 3 − 2 [CO(g) + CO 3 − 2 → 2CO2 (g) + 2e − ] under closed circuit voltage conditions, indicating that CO is responsible for determining the DC-MCFC performance. Highlights: Ni fiber layer between matrix and wet carbon anode shows the highest performance. The optimal weight ratio of carbon to electrolyte for the MCFC performance is 1:1.5. CO is produced via a two-electron transfer reaction.