Nanocellulose coupled flexible polypyrrole@graphene oxide composite paper electrodes with high volumetric capacitance.

A robust and compact freestanding conducting polymer-based electrode material based on nanocellulose coupled polypyrrole@graphene oxide paper is straightforwardly prepared via in situ polymerization for use in high-performance paper-based charge storage devices, exhibiting stable cycling over 16,000 cycles at 5 A g(-1) as well as the largest specific volumetric capacitance (198 F cm(-3)) so far reported for flexible polymer-based electrodes.