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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/038/06/1507-1517

    • Keywords

       

      Supercapacitor; pseudocapacitance; polyaniline; graphene oxide; cycling stability.

    • Abstract

       

      Polyaniline and graphene oxide composite on activated carbon cum reduced graphene oxide-supported supercapacitor electrodes are fabricated and electrochemically characterized in a three-electrode cell assembly. Attractive supercapacitor performance, namely high-power capability and cycling stability for graphene oxide/polyaniline composite, is observed owing to the layered and porous-polymeric-structured electrodes. Based on the materials characterization data in a three-electrode cell assembly, 1 V supercapacitor devices are developed and performance tested. A comparative study has also been conducted for polyaniline and graphene oxide/polyaniline composite-based 1 V supercapacitors for comprehending the synergic effect of graphene oxide and polyaniline. Graphene oxide/polyaniline composite-based capacitor that exhibits about 100 F g−1 specific capacitance with faradaic efficiency in excess of 90% has its energy and power density values of 14 Wh kg−1 and 72 kW kg−1, respectively. Cycle-life data for over 1000 cycles reflect 10% capacitance degradation for graphene oxide/polyaniline composite supercapacitor.

    • Author Affiliations

       

      Deepak Kumar1 Anjan Banerjee1 Satish Patil1 Ashok K Shukla1

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
    • Dates

       

© 2017-2019 Indian Academy of Sciences, Bengaluru.