Ionic conductivities and high resolution microscopic evaluation of grain and grain boundaries of cerium-based codoped solid electrolytes

Synthesis and Characterization of as a solid electrolyte for intermediate-temperature solid oxide fuel cell

“…Solid oxide fuel cells (SOFCs) convert chemical energy directly into electrical energy with high efficiency and eco-friendly manner [1][2][3][4][5][6][7][8][9].However, in spite of these advantages, SOFC still has commercialization r elated problems such as its cost of fabrication at high temperature and durability [10][11][12][13]. One of the strategies which is supposed to be addressed to over come the bottle-neck of operating temperatures of SOFCs is finding an alternate solid electrolyte for intermediate temperature SOFCs (IT-SOFCs) [14][15][16].Ceria based oxides are explicitly being investigated for intermediate temperature applications due to their various advantages over ZrO 2 -based materials [17][18][19].Among the various dopants of ceria studied, samaria doped ceria (SDC) has received great attention as a potential IT-SOFC electrolyte due to its high ionic conductivity [20][21][22][23][24]. However, literature results indicated that the single-doped ceria based oxides have limitations for its application as solid electrolytes due to the tendency of reduction of Ce 4+ (ionic conduction) to Ce 3+ (electronic conduction) [25,26].…”