Modification And Research Of Anode Alloy And Cathode Oxygen Reduction Catalyst For Magnesium Air Battery

Because of the high energy density,low cost and no pollution,Mg-air battery is considered as one of the most promising energy devices.However,the electrochemical polarization,self-corrosion and the electrochemical polarization and poor dynamic performance of the ORR catalyst severely limit the application and development of Mg-air batteries.Therefore,it is of crucial importance to develop the magnesium anodes with good performance and the oxygen reduction reaction catalyst with low cost and high performance for enhancing the cathode performance of Mg-air batteries.In this paper,we choose the wrought Mg-Al-Pb-Re alloy as the anode of the Mg-air battery,selecting manganese oxides and Co-N-C as the cathode catalyst of the Mg-air batteries.The main research contents were given below:Wrought Mg-Al-Pb-RE alloy obtained by melting and casting,and it is synthesized via extrusion.Research the effect of discharge performance with different Extrusion ratio.We observed that compared to other samplers,the 20.5:1 strip exhibits greater stability and higher discharge voltage plateaus for long time?10 h?.The anodic efficiency reaches 64.1%at 10 m A cm^-2,which is higher than pure magnesium and AZ31 magnesium alloy.the 20.5:1 strip has a unique micro structure,the fine grains help improve the discharge efficiency and corrosion resistance of the anodic.MnO₂/C catalyst was synthesized by the reaction of KMn O₄ and conductive black carbon,make the manganese dioxide uniformly loaded on the conductive black carbon.Research the effects of the oxygen reduction reaction?ORR?performance and discharge performance with different processes.We observed that,the oxygen reduction reaction performance of drop by drop is higher than mixing.The half-wave potential of Mn O₂/Drop reaches 0.82 V?vs.RHE?,the limiting current density of Mn O2/C-Drop reaches 4.91 m A cm^-2and the electron transfer number reaches 3.6.Co-N-C composite materials was synthesized by pyrolyzed of several inexpensive chemicals?cobalt salt,melamine,EDTA?,and the zinc nitrate was added to the precursor and calcined at high temperature under inert atmosphere to synthesize Co?Zn?-N-C.Compared with Co-N-C,Co?Zn?-N-C exhibits higher half-wave potential?0.84 V?vs.RHE??and limit current density(6.97 m A cm^-2).