Research On Preparation And Characterization Of Cathode Electrocatalyst LaMnO₃and LSCM For Aluminum-air Battery

Aluminum-air battery has high energy density, Fuel rich, Safe economic and environmental friendly which could be used for electronic products and electric vehicles. development of Aluminu-air battery technology not only conducive the promotion of new energy automotive technology research and development, but also conducive to the development of China’s aluminum industry., oxygen reduction is the important part of Aluminum-air battery, The types of Aluminum-air battery, microstructures structures and preparation method have a big influence on the Aluminum-air battery performance.Taking the development of Aluminum-air battery as the application back ground, this thesis explore the preparation LaMnO3and Sr, Mn doped Lanthanum chromites (La0.7Sr0.3Cr0.5Mn0.5O3/LSCM) with high electronic conductivity, compositional change of the sample, content, microcosmic morphology and the electrochemical properties were tested by Scanning electron microcopy(SEM), Energy dispersive spectroscopy(EDS), X-ray diffraction(XRD), The rmodynamic analysis(TG), Linear Sweep Voltammetry (LSV), Cyclic Voltammogram(CV) and Constant Current Discharge.The LaMnO3_О3-δ material was synthesized by Template method in this paper. The calcined temperature, template content, citric acid content, the concentration of metal ions, pH were studied on phase and microstructure influence on samples of LaMnO3; The results showed that LaMnO3with a pure perovskite structure was prepared with a good structured and has average pore size of500nm with the mass ratio of sample to PMMA of1to3, metal ion concentration is3mol/L, ratio metal ion and citric acid ion is1:0.3, pH=3,calcined temperature of650℃. The samples were prepared under different preparation conditions were tested with polarization curves and cyclic voltammetry curves by electrochemical workstation. The samples were prepared under different preparation conditions were tested with polarization curves and cyclic voltammetry curves by electrochemical workstation, indicate that the catalytic performance of the samples prepared under the optimized conditions is better than other parameters of the process..The LSCM material was synthesized by Template method in this paper. The effect of calcined temperature on the phase and microstructure of the sample was studied. The results showed that LSCM with a pure perovskite structure was prepared with an ano gap structure with the mass ratio of sample to PMMA of1to3, metalion concentration is3mol/L, ratio metalion and citric acid ion of1:0.3, pH=3and calcined temperature of1050℃.LaMnO3and LSCM samples were tested with cyclic voltammetry curves by electrochemical workstation. The stable discharge platform of LSCM is0.96V at10mA. The stable discharge platform of LaMnO3is0.73V at10mA. which showed that the catalytic performance of LSCM was better.