La, Y and Nb Doped SrTiO3 Anodes for Electrolyte Supported SOFC

Bi-doped materials, La, Y and Nb, present at both A and B sites of SrTiO₃ have been synthesized and tested as anode material for SOFC. The cell performance of bi-doped anode material e.g., LYST and LNST found to be higher than single-doped anode e.g., LST and NST. 20 wt % Ni-YSZ addition to LYST and LNST increased the cell performance from 23 mW/cm² to 77 mW/cm² and 25 mW/cm² to 38 mW/cm², respectively. LYST-Ni-YSZ anode gave the maximum power density 70 mW/cm², which is stable for 60 h of operation as shown in fig.1. Physical characterizations e.g., SEM, XRD and TEM of anode materials were investigated to correlate performance of different anodes.                                              

References

[1] M.C.Verbraeken, B.Iwanschitz, A.Mai, J.T.S.Irvine, J. of the Electrochemical Soc. 2012;

     159(11):F757.

[2] P.Puengjinda, H.Muroyama, T.Matsui, K.Eguchi, J. of Power Source 2012;204; 67.

[3] T.Ikebe, H.Muroyama, T.Matsui, K.Eguchi, J. of the Electrochemical Soc. 2010;157(6):B970.

Key words: Bi-doped SrTiO₃, SOFC, electrolyte supported