Abstract:The composite material Fe0.5Co0.25Ni0.25Ox-Ti4O7 electrode was synthesized by photochemical metal-organic deposition (PMOD). Scanning electron microscope (SEM) combined with energy dispersive spectrometer (EDS) and transmission electron microscope (TEM) were used to confirm the morphology and element distribution of electrode materials and the microstructure of the sample powder. The electrode materials Fe0.5Co0.25Ni0.25Ox-Ti4O7 were porous, in which the FeOx, CoOx, and NiOx coated on Ti4O7 by the designed molar ratio and existed in the state of high defect density. The cyclic voltammetry (CV) and linear voltammetry (LSV) tests in 0.1 mol/L KOH electrolyte were performed. The materials have oxygen reduction (ORR) and oxygen precipitation (OER) catalytic activities. Aprotic lithium oxygen batteries were assembled with Fe0.5Co0.25Ni0.25Ox-Ti4O7 materials. The constant current charge and discharge at 100 mA/g, an initial discharge specific capacity of the batteries can reach more than 6 000 mAh/g and the subsequent process decays faster. The batteries can maintain discharge voltage stable above 2.7 V 25 circles under the conditions of the constant current of 100 mA/g and the constant capacity of 800 mAh/g.