La_(0.3)Sr_(0.2)Mn_(0.1)Zn_(0.4) Oxide-Sm_(0.2)Ce_(0.8)O_(1.9) (LSMZ-SDC) Nanocomposite Cathode for Low Temperature SOFCs

摘要

Nanocomposite based cathode materials compatible for low temperature solid oxide fuel cells (LTSOFCs) are being developed. In pursuit of compatible cathode, this research aims to synthesis and investigation nanocomposite La_(0.3)Sr_(0.2)Mn_(0.1)Zn_(0.4) oxide-Sm_(0.2)Ce_(0.8)O_(1.9) (LSMZ-SDC) based system. The material was synthesized through wet chemical method and investigated for oxide-ceria composite based electrolyte LTSOFCs. Electrical property was studied by AC electrochemical impedance spectroscopy (EIS). The microstructure, thermal properties, and elemental analysis of the samples were characterized by TGA/DSC, XRD, SEM, respectively. The AC conductivity of cathode was obtained for 2.4 Scm~(-1) at 550 ℃ in air. This cathode is compatible with ceria-based composite electrolytes and has improved the stability of the material in SOFC cathode environment.