α-MnO2 Nanotube-supported Co3O4 and its Carbon Nanotube Hybrid Material(Co3O4/MnO2-CNTs)as Bi-functional Cathode Catalysts for Rechargeable Zinc-air Batteries with High Energy/Power Density and Cyclic Ability
We have successfully developed both advanced primary and rechargeable Zn-air batteries with cathodes catalyzed by MnO2 nanotubes-supported Co3O4(Co3O4/MnO2)and its carbon nanotubes(CNTs)-hybridized catalyst(Co3O4/MnO2-CNTs).These catalysts are synthesized through a facile two-pot precipitation reaction and hydrothermal process,which exhibit the superior bi-functional catalytic activity for both ORR and OER.The high performance is believed to be induced by the hybrid effect among MnO2 nanotubes,Co3O4 and CNTs,which can produce a synergetic enhancement.When used for integrated into the practical primary and electrochemically rechargeable Zn-air battery,such a hybrid catalyst can give a discharge peak power density in exceeding of 450 mW cm-2.At 1.0 V of cell voltage,a current density of 324 mA cm-2 is achieved.This performance is superior to all reported non-precious metal catalysts in literature for zinc–air batteries and significantly outperforms the state-of-the-art platinum-based catalyst.Particularly,the rechargeable Zn-air battery can be fabricated into all-solid-state one through a simple solid-state approach,which exhibits excellent peak power density of 62 mW cm-2,and the charge and discharge potentials remain virtually unchanged during the overall cycles as to the one with liquid electrolyte.
MnO2 nanotubes two-pot hydrothermal process hybridized network,bifunctional catalysts rechargeable zinc-air battery all-solid-state
Nengneng Xu Jinli Qiao Xia Zhang Min Wang Jiujun Zhang
College of Environmental Science and Engineering,Donghua Universtiy,2999 Ren”min North Road,Shanghai College of Environmental Science and Engineering,Donghua Universtiy,2999 Ren”min North Road,Shanghai Institute of Functional Materials,Donghua University,2999 Ren”min North Road,Shanghai 201620,China;E
国内会议
上海
英文
1-19
2016-11-04（万方平台首次上网日期，不代表论文的发表时间）