Fabrication of flexible micro-supercapacitors based on low-oxidized graphene/polyaniline/porous carbon ternary composites with high area capacitance

Miniaturization of supercapacitor offers an attractive route to the fabrication of portable and wearable electronic devices, but still suffer from limited areal capacitance. Herein, we utilize a facile stamping approach to fabricate flexible paper-based micro-supercapacitors with the ternary composite containing polyaniline (PANI) as patterned interdigital electrode materials. The ternary composites are composed of PANI, metal-organic frameworks derived porous carbon (C800) and low-oxidized graphene (LGE). Benefiting from the synergy of C800 and LGE, the electrical conductivity and capacitance retention of PANI composites were enhanced obviously. The resultant composites displayed high areal capacitance of 162 mF·cm−2, remarkable energy density of 24.9 μWh·cm−2, 90 % capacitance over thousands of charge-discharge cycles and the excellent stability against bending even at large angles.