Mitigating Electronic Conduction in Ceria‐Based Electrolytes via External Structure Design
[5]
- Maryland Energy Innovation Institute University of Maryland College Park MD 20742 USA, Department of Materials Science &, Engineering University of Maryland College Park MD 20742 USA
- Maryland Energy Innovation Institute University of Maryland College Park MD 20742 USA, Department of Chemical and Biomolecular &, Engineering University of Maryland College Park MD 20742 USA
- Maryland Energy Innovation Institute University of Maryland College Park MD 20742 USA
- Maryland Energy Innovation Institute University of Maryland College Park MD 20742 USA, Department of Materials Science &, Engineering University of Maryland College Park MD 20742 USA, Advanced Materials and Technology Research Nissan Technical Centre North America Farmington Hills Michigan 48331 USA
- Maryland Energy Innovation Institute University of Maryland College Park MD 20742 USA, Department of Materials Science &, Engineering University of Maryland College Park MD 20742 USA, Department of Chemical and Biomolecular &, Engineering University of Maryland College Park MD 20742 USA
Abstract Doped ceria electrolytes are the state of the art low‐temperature solid oxide electrolytes because of their high ionic conductivity and good material compatibility. However, cerium tends to reduce once exposed to reducing environments, leading to an increase in electronic conduction and a decrease in efficiency. Here, the leakage current is mitigated in ceria‐based electrolytes by controlling the defect chemistry through an engineered cathode side microstructure. This functional layer effectively addresses the problematic electronic conduction issue in ceria‐based electrolytes without adding significant ohmic resistance and increases the ionic transference number to over 0.93 in a thin 20 µm ceria‐based electrolyte at 500 °C, compared to a of 0.8 for an unmodified one. Based on this design, solid oxide fuel cells (SOFCs) are further demonstrated with the remarkable peak power density of 550 mW at 500 °C and excellent stability for over 2000 h. This approach enables a potential breakthrough in the development of ceria‐based low‐temperature solid oxide electrolytes.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- DEFE0031662
- OSTI ID:
- 2263275
- Alternate ID(s):
- OSTI ID: 2263276
- Journal Information:
- Advanced Functional Materials, Journal Name: Advanced Functional Materials Vol. 34 Journal Issue: 14; ISSN 1616-301X
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
Similar Records
STABLE HIGH CONDUCTIVITY BILAYERED ELECTROLYTES FOR LOW TEMPERATURE SOLID OXIDE FUEL CELLS
STABLE HIGH CONDUCTIVITY BILAYERED ELECTROLYTES FOR LOW TEMPERATURE SOLID OXIDE FUEL CELLS