In this work, graphene/polyaniline (NGP/PANI) inks are formulated; inkjet printing technology is then
used to produce NGP/PANI thin-film electrodes from these inks. With this inkjet printing, good control
over a number of key film properties including pattern geometry, pattern location, film thickness, and
electrical conductivity is achieved. Two-electrode supercapacitors are fabricated using these thin-film
electrodes. Electrochemical measurements with a 1 M H2SO4 electrolyte yield a maximum specific
capacitance of 82 F g1, power density of 124 kW kg1 and energy density of 2.4 Wh kg1 when a scan
rate of 20 mV s1 is applied. The supercapacitors show a long cycle life over 1000 cycles.