Preparation of on chip, flexible supercapacitor with high performance based on electrophoretic deposition of reduced graphene oxide/polypyrrole composites

A new concept is introduced to fabricate flexible, on-chip supercapacitors by electrophoretically depositing highly dispersed reduced graphene oxide/polypyrrole on interdigital-like electrodes. By the unique method, the deposited films could construct on the substrate facilely and uniformly. The prepared all-solid-state device demonstrates high volumetric capacitance (about 147.9 F cm−3), high energy density (13.15 mWh cm−3 at a power density of 1300 mW cm−3) and excellent cycling stability (approximately 71.7% of the initial capacitance retained after 5000 cycles). Compared with other supercapacitor, the device demonstrated here is lightweight, flexible and inexpensive.