Design and Fabrication of Nano-array Architecture for Supercapacitor and Electro-catalytic Reaction

X. Sun
Beijing University of Chemical Technology, CN

Keywords: nanoarray, supercapacitor, electrode, hydrogen evolution reaction, oxygen evolution reaction


Nanostructure arrays, offering uniformed size, ordered structure, lower agglomeration and good connection with the substrate, have been proved as advanced and efficient electrodes in electrochemistry. Through a lot of research, our group has found that the specific capacitance, rate capability and cycling life of the electroactive material could be improved significantly by constructing the materials into nano-array structures.1-2 Hierarchical structure nano-array can provide even higher porosity and loaded mass which lead to the enhencement of areal capacitance (~25 F/cm2) and rate capability, while the specific capacitance and cycling stability can be preserved.3-4 More importantly, nano-array architecture also are effective to gas evolution reaction (e.g. oxygen evolution reaction and hydrogen evolution reaction). Besides the above advantages, nano-array architecture can promote the bubble evolution process because of the low adhesion of the surface to the gas bubbles. This observation should be generally applicable for gas evolution reaction.