Hierarchical Co3O4@Au-decorated PPy core/shell nanowire arrays: an efficient integration of active materials for energy storage

Abstract

We have successfully fabricated hybrid Co₃O₄@Au-decorated PPy core/shell nanowire arrays (NWAs) on Ni foam via in situ interfacial polymerization between HAuCl₄ and pyrrole monomers. With the advantages of high electrochemical activity of each component and high electrical conductivity of the Au-decorated PPy layer, this hybrid electrode exhibits remarkable pseudo-capacitive behaviors. This facile synthesis method offers an attractive strategy to further improve the electrochemical performance of pseudo-capacitors, and it undoubtedly shows promising applications in electrochemical energy storage.