Preparation of high load carbon fiber/graphene/bacterial cellulose/polyaniline electrodes facilitated by plasma towards high capacitive supercapacitors.

[Display omitted] • High capacitance carbon fiber/graphene/bacterial cellulose/polyaniline electrode. • Oxygen plasma modification improved surface hydrophilicity and polyaniline load. • Two-stage conductive network greatly improved carrier transfer rate. In this paper, a novel structured carbon fiber/graphene/bacterial cellulose/polyaniline composite with high capacitive performance was fabricated. Graphene and carbon fiber modified with oxygen plasma formed a two-stage conductive network in composite supplying more pathways for charge carrier, thus improving charge carrier transfer performance. Oxygen plasma improved the hydrophilicity as well as produced more active sites on the surface of carbon fiber and graphene, leading to a higher PANI loading amount. The as-prepared composite presented high PANI loading amount of 6.95 mg/cm2 and areal capacitance of 5.44F/cm2 at the current density of 5 mA/cm2. [ABSTRACT FROM AUTHOR]