An Efficient Ge and Sm Co-Doped Ceria Nanocomposite Electrolyte for Low Temperature Solid Oxide Fuel Cells

Thursday, 27 July 2017
Grand Ballroom East (The Diplomat Beach Resort)
R. Raza (COMSATS Institute of Information Technology) and S. Arshad (Punjab University)
Electrochemical studies of Fuel cell with different composite electrolyte

In this paper, three composite electrolytes (Ce0.8Sm0.2O1.9/Na2CO3) SDC, (Ce0.8Gd0.2O1.9/Na2CO3) GDC and (La0.8Sr0.2Ga0.8Mg0.2O3−δ/Na2CO3)LSGM nanocomposite electrolytes have been studied, also see the effect of Na2CO3, present as second phase, and effect of Ni support, sintering and pressure for dry pressing for fuel cell performance. The electrolytes were prepared through co-precipitation method. Different techniques were used to characterize the prepared electrolytes. The crystal structures were determined using x-ray diffraction (XRD) and structural morphologies were analyzed through scanning electron microscopy (SEM). The four probe dc conductivity and two probe AC impedance analysis were carried out in open air. The fuel cell performance was determined with and without Nickel support on anode side which resulted in a considerable difference in obtained peak power densities. It is suggested that prepared electrolytes can find potential applications in low temperatures Solid Oxide Fuel Cells (LT-SOFCs).

Key words: nanocomposite, LTSOFCs, Crystal structure, SDC, Sintering