Facile synthesis of an all-in-one graphene nanosheets@nickel electrode for high-power performance supercapacitor application.

ABSTRACT: We report a facile and novel approach for the fabrication of all-in-one supercapacitor electrodes by in situ electrochemical exfoliation of flexible graphite paper (FGP) on a nickel collector. The binder-free three dimensional (3D) graphene nanosheets@Ni (GNSs@Ni) supercapacitor electrodes exhibit a high specific capacitance of 196.4 F g^-1 and 36.2 mF cm^-2, respectively, at a scan rate of 50 mV s^-1. Even at the high scan rate of 2500 mV s^-1 the specific capacitance of the capacitor still shows a retention of 85.6% (168 F g^-1, 31 mF cm^-2). Meanwhile, the as-prepared electrode offers excellent cycling performance with 91.5% capacitance retention after 100 000 charging-discharging cycles even at the high current density

SUBMITTER: Huang B 

PROVIDER: S-EPMC9091682 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature