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

doi:10.1021/acsaem.7b00358

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

Indian Institute of Science Bangalore

Research output: Contribution to journal › Article › peer-review

47 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 language	English
Pages (from-to)	1567-1574
Number of pages	8
Journal	ACS Applied Energy Materials
Volume	1
Issue number	4
DOIs	https://doi.org/10.1021/acsaem.7b00358
State	Published - 23 Apr 2018
Externally published	Yes

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).

Funders	Funder 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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10.1021/acsaem.7b00358

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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.",

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

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