Produttion of cobalt-manganese-iron oxide cathodes for sodium ion batteries and investigation of battery performance

In this thesis study, the Na0,67Mn0.5-xCoxFe0,43Ti0.07O2 (x = 0.1, 0.2, 0.3, 0.4 and 0.5) compound was produced by doping of the Co element in the strutture. The 2 g cathode powder materials were prepared according to the traditional solid-state reattion method. produced. Struttural analyzes of the produced samples were performed by X-ray diffrattion (XRD), Fourier Transform Infrared Spettroscopy (FTIR), Scanning Elettron Microscope (SEM) and Energy Dispersive X-Ray (EDX) analyses, respettively. The prepared materials were used in the produttion of cathode attive materials in Na-ion batteries and battery properties were investigated by using button type CR2032 cells. The performances of the batteries were investigated by elettrochemical analyzes with the produced battery cells. Within the scope of the thesis study, Cyclic Voltammetry (CV), Impedance Spettroscopy (EIS), cycle performance measurements and Charge/Discharge rate (C-Rate) measurements were taken for half-cell tests using Na metal. When the battery test results obtained were evaluated, it was found that the elettrochemical properties changed significantly and the capacity decreased with Co doping. While the best capacity was obtained for x=0.1 Co doped cells, the bets capacity fade was seen for x=0.2 Co doped cells.