Basic properties of a liquidt in anode solid oxide fuel cell

Journal Article · Fri Dec 17 04:00:00 EST 2010 · Journal of Power Sources

OSTI ID:1015470

Abernathy, Harry; RandallGemmen,; KirkGerdes,; Koslowske, Mark; ThomasTao,

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 Laboratory - In-house Research
• Sponsoring Organization: USDOE Assistant Secretary for Fossil Energy (FE)
• OSTI ID: 1015470
• Report Number(s): NETL-TPR-3039
• Journal Information: Journal of Power Sources, Journal Name: Journal of Power Sources Journal Issue: 10 Vol. 196; ISSN JPSODZ; ISSN 0378-7753
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
30 DIRECT ENERGY CONVERSION
ANODES
DESIGN
DIFFUSION
Direct coal fuel cell
ELECTROLYTES
FUEL CELLS
HYDROGEN
KINETICS
LIQUID METALS
Liquid metal anode
OXIDES
OXYGEN
Oxygen diffusion
PHYSICAL PROPERTIES
SOLID OXIDE FUEL CELLS
SOLUBILITY
Solid oxide fuel cell
THERMODYNAMICS
TRANSPORT
Tin