Anode-supported SOFC

All fuel cell experiments were carried out using the anode supported Ni SDC (SDC) / SDC / LSM (SDC) cells described above. Temperatures reported are those at the fuel cell reaction zone. Fig. 4 shows the voltage V and power density P versus the current density J for the anode-supported SOFC operated on the R = 0.6 fuel mixture at 200 mL.min. ... 

Anode-supported SOFCs with LSGM electrolytes (5-fJ.m thick) and SDC interlayers (2-fim thick) were fabricated by pulsed laser deposition [243],... 

Primdahl S, Jprgensen MJ, Bagger C, and Kindi B. Thin anode supported SOFC. In Singhal SC, Dokiya M, editors. Proceedings of the Sixth International Symposium on Solid Oxide Fuel cells (SOFC-VI). Pennington, NJ The Electrochemical Society, 1999 99(19) 793-802. 

FIGURE 6.8 Electrophoretic deposition used to deposit tubular anode-supported SOFCs [49]. Reprinted with permission from Blackwell Publishing. 

Mertens J, Haanappel VAC, Tropartz C, Herzhof W, and Buchkremer HP. The electrochemical performance of anode-supported SOFCs with LSM-type cathodes produced by alternative processing routes. J. Fuel Cell Sci. Technol. 2006 3 125-130. 

Kong J, Sun K, Zhou D, Zhang N, Mu J, and Qiao J. Ni-YSZ gradient anodes for anode-supported SOFCs. J. Power Sources 2007 166 337-342. 

Bi Z, Yi B, Wang Z, Dong Y, Wu H, She Y et al. A high-performance anode-supported SOFC with LDC-LSGM bilayer electrolytes. Electrochem. Solid State Lett. 2004 7 A105-A107. 

Jiang Y., Virkar A.V., 2003. Fuel composition and diluent effect on gas transport and performance of anode-supported SOFCs. Journal of the Electrochemical Society 150(7), A942-A951. 

The fuel cell analyzed in the present section is a disk-shaped anode-supported SOFC, currently produced by H.C. Starck/InDEC B.V As illustrated in Figure 4.1 [1], the anode material is a cermet of nickel oxide doped with yttrium stablilized zir-conia (NiO/8YSZ). The cathode is composed of two layers one made of 8YSZ with strontium-doped LaMnC>3 (8YSZ/LSM) and one of LSM. The electrolyte consists of a dense 8YSZ material. 

Assumption (2) is justified by the high electrical conductivity of the current collectors, compared to those of the electrodes. Assumption (3) derives from the low gas speed in the SOFC gas channels, where the density variation is not related to com-pressions/expansions [6], Assumption (4) is introduced because in anode-supported SOFCs, radiative heat transfer can be neglected compared to convective heat transfer phenomena [7, 8], Finally, assumption (5) is made for simplicity considering the high electronic conductivity of the electrode, compared to the ionic conductivity, which reduces the ability of oxygen ions to migrate through the electrodes. 

Yakabe, H. and Sakurai, T., Analyses on the performance of anode-supported SOFC stacks, in Proceedings of2003 Fuel Cell Seminar, 2003, p. 295. 

Simner, S.P., Bonnett, J.F., Canfield, N.L., Meinhardt, K.D., Sprenkle, V.L., and Stevenson, J.W., Optimized lanthanum ferrite-based cathodes for anode-supported SOFCs, Electrochemical Solid-State Letters, 2002, 5, A173. 

Morel B, Laurencin J, Bultel Y, Lefebvre-Joud F (2005) Anode-supported SOFC model centered on the direct internal reforming. J Electrochem Soc 152 A1382... 

Finalized selection of fuel cell t5q)cs for analysis. Determined that PEM and planar anode-supported SOFC are the most attractive fuel cell technologies to assess for onroad transportation APU applications. 

Based upon current publicly available data, PEM and anode-supported SOFC technologies are the most promising technologies for transportation APUs, and thus will be the focus of this project. The performance specifications of fuel cell technologies are summarized in Figure 1. The key factors that... 

There are mainly three categories to prepare an anode support SOFC [43] ... 

In this chapter a detailed CFD study of the chemical and electrochemical processes in an internally reforming anode supported SOFC button cell was carried out. Detailed models for chemistry, electrochemistry and porous media transport have been implemented into the commercial CFD code FLUENT with the help of used defined functions (UDF). Simulation results were compared with experimentally reported data. The comparisons lead to the conclusion that precise calculation of surface carbon formation is critical for the accurate prediction of OCVs for hydrocarbon fuels with very low H2O content, and that Nemst equation may not be valid for the calculation of OCV for a fuel composition such as the one considered here. Anodic overpotentials showed remarkable difference from expected behavior. 

CHARACTERIZATION OF THE RE-OXIDATION BEHAVIOR OF ANODE-SUPPORTED SOFCS... 

Characterization of the Re-Oxidation Behavior of Anode-Supported SOFCs... 

A. Wood, M. Pastula, D. Waldbillig and D.G. Ivey, Initial Testing of Solutions to Redox Problems with Anode-Supported SOFC, J. Electrochem. Soc., 153 (10), p. A1929 (2006)... 

Figure 22. Experimental data of the cell voltage sensitivity to fuel utilization for a tubular anode-supported SOFC.

T., and Yakabe, H. (2002) Development of Anode-Supported SOFC with Metallic Interconnectors for Reduced-Temperature Operation, in Proceedings of the Fifth European Solid Oxide Fuel Cell Forum, Vol. 2,... 

Jacques-Bedard, X., Napporn, T.W., Roberge, R., and Meunier, M. (2006) Performance and ageing of an anode-supported SOFC operated in single-chamber conditions. J. Power Sources, 153 (1), 108-113. 

Tomita, A., Teranishi, S., Nagao, M., Hibino, T., and Sano, M. (2006) Comparative performance of anode-supported SOFCs using a thin Ceo.9Gdo.1O1.95 electrolyte with an incorporated BaCeo.8To 203 a layer in hydrogen and methane. J. Electrochem. Soc., 153 (6), A956-A960. 

Haanappel, V.A.C., Mai, A., and Mertens, J. (2006) Electrode activation of anode-supported SOFCs with LSM- and LSCF-type cathodes. Solid State Ionics, 177, 2033-2037. 

Haanappel, V.A.C., Mertens, )., Rutenbeck, D., Tropartz, C., Herhof W., Sebold, D., and Tietz, F. (2005) Optimisation of processing and microstructural parameters of LSM cathodes to improve the electrochemical performance of anode-supported SOFCs. J. Power Sources, 141, 216—226. 

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