Impact of oxygen-defects induced electrochemical properties of three-dimensional flower-like CoMoO4 nanoarchitecture for supercapacitor applications

Periyasamy Sivakumar, C. Justin Raj, Loganathan Kulandaivel, Jeong Won Park, Hyun Jung

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The rational strategy to design the well-ordered morphology of the metal oxides with defective engineering and tailoring them into specific electrode fabrication can significantly improve their electrochemical properties for high-performance energy storage systems. Herein, we adopted an effective strategy to introduce oxygen-defect into the well-ordered three-dimensional flower-like CoMoO4 nanoarchitecture. The Co-Mo precursor leads to the introduction of oxygen-defects into the CoMoO4 (rCMO) nanoarchitecture during the heat-treatment under an oxygen-controlled environment (argon). The oxygen-defects in the material could facilitate abundant electroactive sites and intrinsically enhance the conductivity and supercapacitor performance. The oxygen-defect CoMoO4 (rCMO) exhibits a specific capacity of 531 mAh g−1 at a current density of 1 A g−1 compared to the pristine CoMoO4 (CMO; ambient atmosphere) of 322 mAh g−1 under the same current density. Meanwhile, the fabricated hybrid supercapacitor (HSC) of rCMO//AC provides a maximum specific capacitance of 159 F g−1. Further, it distributes an energy density of 49.87 Wh kg−1 at the power density of 845.45 W kg−1 with an excellent cyclic life of ~91.03% over 10 000 cycles.

Original languageEnglish
Pages (from-to)17043-17055
Number of pages13
JournalInternational Journal of Energy Research
Volume46
Issue number12
DOIs
StatePublished - 10 Oct 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022 John Wiley & Sons Ltd.

Funding

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) of Korea, South Korea funded by the Ministry of Education (No. NRF‐2016R1D1A1B01009640).

FundersFunder number
Ministry of EducationNRF‐2016R1D1A1B01009640
National Research Foundation of Korea

    Keywords

    • 3D nanoflower
    • CoMoO
    • energy storage
    • metal oxide
    • oxygen-defect
    • supercapacitor

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