Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 16, Pages 18526-18532Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c01611
Keywords
SOFC; redox stability; surface decoration; infiltration; low temperature ceramic anodes
Funding
- U.S. Department of Energy [DEAR0000494, DE-FE0027897]
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A critical factor hampering the deployment of fuel-flexible, low-temperature solid oxide fuel cells (LT-SOFCs) is the long-term stability of the electrode in different gas environments. Specifically, for state-of-the-art Ni-cermet anodes, reduction/oxidation (redox) cycles during fuel-rich and fuel-starved conditions cause a huge volume change, eventually leading to cell failure. Here, we report a robust redox-stable SrFe0.2Co0.4Mo0.4O3 (SFCM)/Ce0.9Gd0.1O2 ceramic anode-supported LT-SOFC with high performance and remarkable redox stability. The anode-supported configuration tackles the high ohmic loss associated with conventional ceramic anodes, achieving a high open circuit voltage of similar to 0.9 V and a peak power density of 500 mW/cm(2) at 600 degrees C in hydrogen. In addition, ceramic anode-supported SOFCs are stable over tens of redox cycles under harsh operating conditions. Our study reveals that oxygen nonstoichiometry of SFCM compensates for the dimensional changes that occur during redox cycles. Our results demonstrate the potential of all ceramic cells for the next generation of LT-SOFCs.
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