Abstract:
Renewable energy sources are growing increasingly essential in this day. In order to avert
climate change, they will play and expect a more important role in the near future. Fuel cells
have gotten a lot of interest in this context because of their high conversion efficiency when
compared to traditional energy conversion systems. Solid oxide fuel cells (SOFC) are one of the
finest energy conversion technologies available, with minimal hazardous emissions, pollution,
fuel adaptability, and expense materials properties. However, there are still some issues to be
resolved; for example, the activity of SOFCs at low temperatures is reduced due to interfacial
polarization blockages and also the oxygen reduction process (ORR).
Lanthanum Iron Copper Oxide Cathode materials are created to increase activity and ORR. The
cathode materials La1Fe1-xCuxO3–δ where x= 0.1, 0.3, 0.5 and 0.7 are synthesis by sol gel
method. Their characteristics are investigated by various characterizations such as Raman
Spectroscopy, Fourier Transformation Infrared Spectroscopy (FTIR), X-Rays Diffraction
(XRD), and Electrochemical Impedance Spectroscopy (EIS). Prominent bands at peak positions
158, 290, 305, 960 cm−1 wavelengths are observed through Raman spectra of La1Fe1-xCuxO3–δ
at x = 0.1, 0.3, 0.5 and 0.7 cathodes, analogous to lanthanum site vibration, typical stretching,
symmetric stretching vibrations for Cu-O band, phonon mode, octahedral tilt vibrations, D band
and associated with Ag and Bg double energy band. The prominent peaks at 675, 855, 1056,
1458, 1645 and 2830 cm-1 wavelengths observed through FTIR Analysis, these peaks attributed
to stretching vibration of La-O bond, Cu-O stretching vibration, bending vibration of C-H in
gaseous, asymmetric and symmetric O-C-O stretching vibrations, bending mode of H-O-H bond
vibrations. XRD also provide crystal structure of materials.
Two cards from La1Fe0.9Cu0.1O3–δ (JCPDS card number 96-100-8543) and (JCPDS card number
96-901-4244) have an orthorhombic structure. Two cards from La1Fe0.7Cu0.3O3–δ (ICSD card No
96-900-2333) and (ICSD card No 96-100-8573) shows an orthorhombic structure. Two cards
from La1Fe0.5Cu5.5O3–δ (ICSD card No 96-901-5232) and (ICSD card No 96-200-2184) show an
orthorhombic structure. Two cards from La1Fe0.3Cu0.7O3–δO3–δ (ICSD card No 96-100-8930) and
xi
(ICSD 96-200-1419) describe hexagonal and orthorhombic Structure. Electrochemical
Impedance Spectroscopy is use to analyze the electronic and ionic behavior of the material.
Material La1Fe0.3Cu0.7O3–δ has good electronic behavior and enhanced the maximum ORR of
material.
