Preparation And Characterization Of Porous Catalysts For Lithium-air Batteries

Intelligent clothing has become a hot spot in the field of clothing research and development.A combination of electronic components with ordinary clothing is the most common way to make clothing intelligent.At present,the energy needed for the electronic components in smart clothing mainly from changing cells,and common batteries have short life time,low power density and heavy weight,which influence the development of smart clothing seriously.Therefore,the development of a new battery with a long life,light weight and high energy density becomes the top issue intelligent clothing with electronic devices facing.Li-air battery,a novel next generation energy storage system,possesses superior theoretical specific energy density,which attracts a widespread attention.Before its practical utilization,Li-air battery still faces several major problems,urgent to be resolved.This paper mainly focuses on the problem of the cathode catalyst for Li-air battery,and makes two porous catalysts.The results are as follows:(1)Using KMnO4,polycarylonitrile(PAN)and polymethyl methacrylate(PMMA)as raw materials,the porous MnOx/CNFs were obtained by electrospinning technology.The results show when the mass ratio of PAN to PMMA is 2:1,the specific area reaches maximum,908.982mz/g.Compared with commercial VXC-72,the first discharge plateau of Li-air battery containing MnOx/CNFs catalyst is higher(2.71V),and its first discharge capacity reaches 1906mAh/g.(2)Firstly,VXC-72 is treated by oxygen plasma,and then ATO/CB hybrids with uniform particle size were synthesized by pol-gel method.Compared with commercial VXC-72,the results show the first discharge plateau of ATO/CB cathode is better(2.75V cf.2.62V).The specific capacity reaches 1756mAh/g at a current density of 0.2mA/cm2.