Abstract:
In today's society, renewable energy sources are becoming increasingly significant. If climate
change is to be averted, they will be critical in the near future. Fuel cells have aroused a lot of
interest in this business because of their high conversion efficiency when compared to
traditional energy conversion methods. Because of its low hazardous emissions, pollution, fuel
adaptability, and cost-effective components, SOFCs are importance source for energy
conversion technologies. Some issues, such as the fact that SOFC activity is reduced at low
temperatures due to interfacial polarization blockages and the oxygen reduction process, have
yet to be resolved (ORR). Lithium has been used as a replacement. To improve activity and
ORR, a Coper Ferrite (Li1Cu1-yFeyO3) perovskite type cathode material was developed. The
produced material is lithium substituted Coper Ferrite (Li1Cu1-yFeyO3) (LCF), with y=0.1, 0.3,
and 0.5. With the sol-gel technique all the samples are synthesized. The functions of cathode
materials (Li1Cu1-yFeyO3) (LCF) are investigated in this study. Raman spectra of LCF cathodes
reveal strong bands at wavelengths of 192cm-1, 326cm-1, 558cm-1, 778cm-1, and 1109cm-1,
revealing tetragonal coper ferrites, lithium oxide, and asymmetric stretching vibration of the
Fe-O bond in the FeO6 octahedral site. Strong peaks at 671cm-1, 841cm-1, and 1422cm-1 were
found in the cathode material, which were attributed to Fe+3 and O stretching at tetrahedral
sites, lithium oxide displaying octahedral sites, and symmetric vibration of nitrate groups. Tauc
plot is used to calculate the band gap energy of Li1Cu0.9 Fe0.1, Li1Cu0.7Fe0.3, and
Li1Cu0.5Fe0.5cathode materials. The direct and indirect band gaps are 3.6eV, 3.80eV, 3.73eV;
4.05eV, 4.04eV, 4.04eV. The LiCu0.9Fe0.1O3–δ (LCF) has maximum conductivity of 8.1Scm-1
at 700°C
