Rapid microwave-assisted synthesis of high-rate FeS 2 nanoparticles anchored on graphene for hybrid supercapacitors with ultrahigh energy density

Benefitting from the high specific capacity (793 C g −1 ) of the FeS 2 /graphene anode, an assembled all-solid-state hybrid supercapacitor device based on the FeS 2 /graphene anode and a Ni(OH) 2 @Co 9 S 8 cathode achieves an ultrahigh energy density of up to 95.8 W h kg −1 at a power density of 949 W kg −1 .