Eigenstate PANI–coated paper fiber with graphene materials for high-performance supercapacitor.

In this paper, using a low-cost paper fiber (PF) as a substrate, eigenstate polyaniline–coated PFs with graphene (GO/PANI/PF) ternary materials were synthesized by using the chemical oxidative polymerization method. Electrochemical measurements showed that the GO/PANI/PF electrode exhibited an excellent electrochemical performance compared with the PANI electrode. By adjusting the ratio of PANI and PF, the as-prepared GO/PANI/PF–2.5% electrode exhibited the highest specific capacitance 937 F g⁻¹ at current density 1 A g⁻¹ in a 0.5 M H₂SO₄ aqueous solution, and 74.5% retention of initial capacitance after 2000 charge–discharge cycles at 5 A g⁻¹. The symmetric capacitor on the basis of GO/PANI/PF nanocomposite delivers a superior energy density of 10.12 Wh kg⁻¹ at 456 W kg⁻¹ at a current density of 1 A g⁻¹. [ABSTRACT FROM AUTHOR]