Preparation and Investigate Electrochemical Properties of Co-doped Strontium Iron Titanium (SFT) for solid oxide fuel cell.

Abstract

The synthesis of barium chloride and lanthanum nitrate doping with SFT based composite material as an effective cathode material in solid oxide fuel cell. As fuel cell is an efficient device for its clean energy production. To enhance the efficiency of such type of clean energy devices an efficient electrode material is required for its proper working. In fuel cell, there is also a need to study the behavior of liquid fuel as well as their performance by using proper electrode material and catalyst. For this purpose to synthesize cathode material at nanoscale for SOFC to have high electrical conductivity and power density at low temperature. This approach is to prepare nanomaterial of the cathode for SOFCs that are low cost and operate efficiently at low temperature. A series of three samples of BaSrFeTi (BSFT) and three samples of LaSrFeTi (LSFT) nanomaterials for cathode has been fabricated and investigated. The variety of nanocompsite cathode materials were synthesized with different compositions by the Sol-Gel method, and sintered at 800 0C for four hours, and then grinded. These samples were characterized by XRD, EDX, SEM, and DC conductivity measurement. The prepared samples also shows at low temperature better electrical conductivities of BSFT is 0.13 Scm-1 at 650 0C and LSFT is 0.10 Scm-1 at 650 0C. The XRD results that both material Ba0.1 Sr0.1 Fe0.2 Ti0.6 (BSFT) and La0.1 Sr0.1 Fe0.2 Ti0.6 (LSFT) has a crystalline structure with three-phase(hexagonal, monoclinic, monoclinic), and their average crystalline size is 26.0 nm and BSFT has crystalline structure with tow-phase(hexagonal, monoclinic) their average crystalline size is 38.0 nm. The SEM results of samples represent that materials are homogenous and porous. The EDX analysis of samples successfully show their elemental composition and conformity.