Development of Single Chamber Solid Oxide Fuel Cell using BaLaIn2O5.5 (BLI) Solid Electrolyte: Introduction of Sublimation Materials as Pore Former in Electrode Preparation

Introduction Due to its higher oxide ionic conductivity than yttriastabilized zirconia (YSZ), BaLaIn2O5.5 (BLI), which has a defective perovskite-related structure, is chosen to serve as solid electrolyte in solid oxide fuel cell. In a conventional dual chamber system, BLI cannot be utilized because indium ion is reduced at oxygen partial pressure as low as that of fuel electrode. Therefore, we have developed a single chamber system with mild reducing atmosphere such as a mixture of methane and air, which allowed the utilization of BLI. It has been observed that one of the major causes to low performance of solid oxide fuel cell in the single chamber system is its impedance, especially, from electrochemical reaction occurring at the electrode. The aim of this study is, thus, to improve cell performance by enhancing the electrochemical reactions by means of utilization of sublimation materials as pore formers in electrode material preparation.