LAUSR

The novel ternary composite reduced-graphene oxide/WO3/poly(p-phenylenediamine) (rGO/WO3/PpPD, GWP) with excellent electrochemical performance has been first prepared by two steps. The hierarchical structure of WO3 microsphere, which is formed by WO3 rods arranged in vertical directions, has been designed. Such a structure has a large specific surface area, and favorable paths for electron transfer and ion adsorption. Moreover, the addition of rGO and PpPD has established a hybrid type material containing both pseudocapacitive and EDLC materials. This hybrid material after optimization exhibits excellent specific capacitance (508.9 F g−1 at 1 A g−1), and the 91.42% of its initial specific capacitance can be retained after 2000 cycles at 18 A g−1. These results demonstrate that the novel composite has great potential to be a candidate for energy storage.