Basic properties of a liquidt in anode solid oxide fuel cell
An unconventional high temperature fuel cell system, the liquidt in anode solid oxide fuel cell(LTA-SOFC), is discussed. A thermodynamic analysis of a solid oxide fuel cell with a liquid metal anode is developed. Pertinent thermo chemical and thermo physical properties of liquid tin in particular are detailed. An experimental setup for analysis of LTA-SOFC anode kinetics is described, and data for a planar cell under hydrogen indicated an effective oxygen diffusion coefficient of 5.3×10−5 cm2 s−1 at 800 ◦C and 8.9×10−5 cm2 s−1 at 900 ◦C. This value is similar to previously reported literature values for liquid tin. The oxygen conductivity through the tin, calculated from measured diffusion coefficients and theoretical oxygen solubility limits, is found to be on the same order of thatofyttria-stabilizedzirconia(YSZ), a traditional SOFC electrolyte material. As such,the ohmicloss due to oxygen transport through the tin layer must be considered in practical system cell design since the tin layer will usually be at least as thick as the electrolyte.
- Research Organization:
- National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy (FE)
- OSTI ID:
- 1015470
- Report Number(s):
- NETL-TPR-3039; JPSODZ; TRN: US201111%%618
- Journal Information:
- Journal of Power Sources, Vol. 196, Issue 10; ISSN 0378-7753
- Country of Publication:
- United States
- Language:
- English
Similar Records
Diffusion Limitations in the Porous Anodes of SOFCs
Novel Fuel Cells for Coal Based Systems