A Bismuth and Gallium Co-doped Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cell

Abstract

To avoid carbon dioxide emissions, which cause global warming and climate change, the trend is turning toward renewable energy sources. Because of their high energy conversion and low/zero emissions, solid oxide fuel cells (SOFCs) are one of the finest solutions for energy production. SOFC is a fantastic choice for using biogas as a clean and high-energy conversion. There are still a few issues to work out, particularly for SOFCs with biogas fuel that operate at intermediate to lower temperatures. The perovskite structure plays a vital role in meeting the materials requirements for SOFCs.As a result, strontium-based perovskite structured cathode materials were created in this study. Strontium cobalt bismuth gallium oxide (SrCo1-x-yBixGayO3–δ (SCBG)) is the suggested material, with x=0, 0.1,0.2 and y=0, 0.1,0.2. The sol gel technique was used to prepare allof the samples. This study looks at the functions of cathode materials (SrCo1x- yBixGayO3–δ (SCBG)). Raman spectra of LSCF cathodes reveal prominent bands at peak positions, 130,420,515, 632, and 990 cm-1 wavelengths, corresponding to bonds characteristic vibrations and, optical phonon mode. Because it generates more oxygen ion vacancies, SCBG is a great cathode material, enhancing the oxygen reduction reaction (ORR) at the cathodic sites. XRD pattern of SCB10 and SCG10 is observed in such a way that crystalline structure was 38.65 and 38.13 nm respectively, that was confirmed by using SEM that concluded grain size 30-60 nm. The structure of proposed materials are rehmbohedral and hexagonal for SCB10 and SCG10 respectively. Sem confirmed that our samples are porous and has spheriacal and cylendrical particle shape that allows the maximum space to oxygen vaccencies. The low ohmic resistance metre KD2531 is use to assess the DC conductivity of SCBG cathode samples. At 600 °C, the sample SCBG20 from citric extracts has a maximum conductivity of 28.125 Scm-1 and ASR 0.0565 Ωcm2, via citrus extracts at 600 °C.