Layered Assembly of Reduced Graphene Oxide and Vanadium Oxide Heterostructure Supercapacitor Electrodes with Larger Surface Area for Efficient Energy-Storage Performance

Buddha Deka Boruah, Sukanta Nandi, Abha Misra

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

The architecture of a supercapacitor (SC) electrode plays a crucial role in defining the overall energy-storage performance of the SC. Layer-by-layer assembly of a reduced graphene oxide (rGO) and vanadium oxide (V2O5) (rGO/V2O5)-based heterostructure is patterned in interdigitated electrodes (IDEs) deposited directly on a flexible conducting current collector for the SC. The IDE pattern offers efficient accessibility to the electrolyte ions and a synergistic contribution for energy storage. An as-fabricated solid-state flexible sandwich-type SC with IDEs displays a more efficient energy-storage performance than a conventional solid-state flexible sandwich-type SC composed of rGO/V2O5 electrodes. Moreover, a solid-state flexible in-plane microsupercapacitor (MSC) is fabricated, which offers much higher capacitance (24 mF/cm2 and 34.28 F/cm3) and energy density (3.3 μWh/cm2 and 4.7 mWh/cm3). The as-fabricated flexible in-plane MSC displays a negligible capacitance loss of about 6.3% after 10 000 charge-discharge cycles and a superior stability of energy-storage performance towards mechanical deformation.

Original languageEnglish
Pages (from-to)1567-1574
Number of pages8
JournalACS Applied Energy Materials
Volume1
Issue number4
DOIs
StatePublished - 23 Apr 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2018 American Chemical Society.

Funding

A.M. would like to thank the Department of Science and Technology (DST) for funding the project under the fast track grant (Grant no. DST-1272).

FundersFunder number
Department of Science and Technology, Government of Kerala

    Keywords

    • heterostructure material
    • in-plane microsupercapacitor
    • interdigitated electrodes
    • sandwich-type supercapacitors
    • synergistic effect

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