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

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.