The Effect of CrFe 2 O 4 Addition on the Ionic Conductivity Properties of Manganese-Substituted LiFeO 2 Material

The influence of Mn substitution on the iron lattice sites in LiFeO 2 material was investigated with respect to the electronic, crystalline, and electrochemical properties of the material, using the LiFe 1− x Mn x O 2 ( x = 0.0, 0.05, and 0.10) series. The electronic structure study was conducted with the acquisition of x-ray absorption fine structure spectroscopy data, while the crystal structure properties of the studied materials were investigated using x-ray diffraction patterns. The data collected for the ionic conductivity properties of the samples by electrochemical impedance spectroscopy under increasing temperature conditions around and above room temperature aided the crystal and electronic structure studies on cathode materials. Furthermore, studies were conducted with the addition of CrFe 2 O 4 material in varying molar concentrations into LiFeO 2 material, as CrFe 2 O 4 is known to have thermoelectric properties well above the room temperature of 400 K (127°C). Encouraging results for next-generation battery cathodes were obtained.