Graphene based integrated tandem supercapacitors fabricated directly on separators

Graphene based integrated tandem supercapacitors are fabricated using direct electrode deposition on a separator (DEDS) process and demonstrated for the first time. The integrated graphene‐polyaniline tandem supercapacitors show ultrahigh volumetric energy density of 52.5 W h L−1 at power density of 6037 W L−1 and excellent gravimetric energy density of 26.1 W h kg−1 at power density of 3002 W kg−1 with outstanding stability for more than 10000 cycles.