Researchers from Washington State University and Kyung Hee University in Korea have fabricated a solid oxide fuel cell (SOFC) with a novel mixed conductivity MoO2-based anode that is fueled by direct feeding of premium gasoline without external reforming. In a paper in the Journal of Power Sources, they suggest that the results of their study imply that an SOFC using a MoO2-based anode has potential for generating electrical power from gasoline for future hybrid electric vehicles.
They fabricated the MoO2-based anode via an electrospray process. Their fuel cell demonstrated a power density >3.0 W cm−2 at 0.6 V. Over 24 hours of operation, the open cell voltage remained stable at ∼0.9 V. At the cell voltage of 0.6 V, its current density dropped over the first 7 h to a value of ∼3.0 A cm−2, where it stayed for the remaining 17 h of the test with a minor fluctuation. Power density of ∼2.0 W cm−2 at 0.6 V was still measured after 24 h on stream with a continuous feed of gasoline.
Scanning electron microscopy (SEM) examination of the anode surface pre- and post-testing showed no evidence of coking, which they said hints at the reason for the observed stability under the harsh cell operating conditions.
Xiaoxue Hou, Oscar Marin-Flores, Byeong Wan Kwon, Jinsoo Kim, M. Grant Norton, Su Ha (2014) “Gasoline-fueled solid oxide fuel cell with high power density,” Journal of Power Sources, Volume 268, Pages 546-549 doi: 10.1016/j.jpowsour.2014.06.038