3D Hollow Sphere Co3O4/MnO2-CNTs:Its High-performance Bifunctional Cathode catalysis and Application in Rechargeable Zinc-air Battery
Recently,there has been a continuous requirement for high active,excellently durable,and low-cost electrocatalysts for rechargeable zinc air battery.Among many low-cost metal based candidates,transition metal oxides with the CNTS composite have gained increasing attention.In this paper,MnO2 nanotube-supported Co3O4 nanoparticles and its carbon nanotubes hybrid material(Co3O4/MnO2-CNTs)was successfully synthesized by using a co-precipitation method combined with post-heat treatment.The morphology and composition of the catalyst are analyzed through SEM,TEM,TEM-mapping,XRD,EDX and XPS.The hybrid Co3O4/MnO2-CNTs nanomaterials exhibit outstanding catalytic activity toward oxygen reduction reaction and oxygen evolution reaction under alkaline conditions(6M KOH)compared with other catalyst such as the commercial 20%Pt/C,Co3O4/MnO2,sole MnO2 nanotubes and CNTs by LSV.Moreover,primary and rechargeable Zn-air batteries made with the optimal catalyst to prove its prominently bifunctional activity and stability.The hybrid Co3O4/MnO2-CNTs-350 shows a decent open circuit voltage(~1.47V),a high discharge peak power density(340 mW cm-2)and a large specific capacity(775 mAh g-1 at 10 mA cm-2)for primary Zn-air battery.In a rechargeable Zn-air battery,this optimal bifunctional catalyst reveals small charge–discharge voltage gap(<1.1V)and much higher cycle-life(504 cycles at 10 mA cm-2 with 10 min per cycle).More importantly,the simple synthesis method is also suitable for the large-scale production of this bifunctional material owing to simple process and effective cost.
bifunctional catalyst activity and stability rechargeable zinc-air battery high specific capacity
Xuemei Li Jinli Qiao Nengneng Xu
College of Environmental Science and Engineering,Donghua Universtiy,2999Ren”min North Road,Shanghai College of Environmental Science and Engineering,Donghua Universtiy,2999Ren”min North Road,Shanghai
国内会议
上海
英文
1-32
2016-11-04（万方平台首次上网日期，不代表论文的发表时间）