The synthesis of cobalt-doped lithium ferrite (LiCo 0.075 Fe 1.925 O 4 ) using sol-gel auto-combustion has resulted in a crystallite size of 13 nm. The particles are mostly spherical with little aggregation, as seen in the SEM images. The XRD peaks and SAED pattern showed a correlation, while the FTIR spectrum linked vibrational frequencies to specific sites and complexes. These findings confirm the successful synthesis of LiCo 0.075 Fe 1.925 O 4 . The bandgap of 2.20 eV confirms that the product is a semiconductor. The results of Cyclic Voltammetry demonstrated that LiCo 0.075 Fe 1.925 O 4 exhibited a specific capacitance of 708.69 F/g at a scan rate of 100 mV/s. These findings suggest that LiCo 0.075 Fe 1.925 O 4 holds great promise for applications in supercapacitors. The use of galvanostatic charge-discharge (GCD) and electrochemical impedance analysis (EIA) offers key insights into supercapacitors. Few studies have explored this area. A notable feature of this research is the reduction of crystallite size, improving the surface-to-volume ratio and showing potential for future solar cell applications.
Shinde et al. (Thu,) studied this question.