A High-Performing Direct Carbon Fuel Cell with a 3D Architectured Anode Operated Below 600 °C
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
Direct carbon fuel cells (DCFCs) are highly efficient and sustainable power generators fueled by abundant and cheap solid carbons. However, the limited formation of triple phase boundaries (TPBs) within fuel electrode inhibits their performance even at very high temperatures. To address the challenges of low carbon oxidation activity and low carbon utilization simultaneously, a highly efficient anode with 3D solid-state textile framework has been developed to advance the performance of DCFCs at intermediate temperatures. The cells with the 3D textile anode, Gd:CeO2-Li/Na2CO3 composite electrolyte, and Sm0.5Sr0.5CoO3 (SSC) cathode have demonstrated excellent performance at intermediate temperatures with maximum power densities of 143, 196, and 325 mW cm-2 at 500, 550, and 600°C, respectively. At 500°C, the cells could be operated steadily at a constant polarization current density of 0.15Acm-2 at for approximately 2 hours with a carbon utilization reaching 86%. The significant improvement of the cell performance at low temperatures attributes to the high synergistic conduction of the composite electrolyte and the superior 3D anode structure which offers more paths for carbon catalytic oxidation. Our results indicate the feasibility of directly electrochemical oxidation of solid carbon at 500-600°C with a high carbon utilization and represent a promising strategy to develop 3D architectured electrodes for fuel cells and other electrochemical devices.
- Research Organization:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE)
- Grant/Contract Number:
- AC07-05ID14517; DE‐AC07‐05ID14517
- OSTI ID:
- 1476801
- Alternate ID(s):
- OSTI ID: 1412582
- Report Number(s):
- INL/JOU-17-42522-Rev001
- Journal Information:
- Advanced Materials, Vol. 30, Issue 4; ISSN 0935-9648
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
3D Self-Architectured Steam Electrode Enabled Efficient and Durable Hydrogen Production in a Proton-Conducting Solid Oxide Electrolysis Cell at Temperatures Lower Than 600 °C
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journal | August 2018 |
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