High-performance flexible supercapacitors based on electrochemically tailored three-dimensional reduced graphene oxide networks.

ABSTRACT: A simple approach for growing porous electrochemically reduced graphene oxide (pErGO) networks on copper wire, modified with galvanostatically deposited copper foam is demonstrated. The as-prepared pErGO networks on the copper wire are directly used to fabricate solid-state supercapacitor. The pErGO-based supercapacitor can deliver a specific capacitance (Csp) as high as 81±3 F g-1 at 0.5 A g-1 with polyvinyl alcohol/H3PO4 gel electrolyte. The Csp per unit length and area are calculated as 40.5 mF cm-1 and 283.5 mF cm-2, respectively. The shape of the voltammogram retained up to high scan rate of 100 V s-1. The pErGO-based supercapacitor device exhibits noticeably high charge-discharge cycling stability, with 94.5% Csp retained even after 5000 cycles at 5 A g-1. Nominal change in the speci

SUBMITTER: Purkait T 

PROVIDER: S-EPMC5766552 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature