Two dimensional layered nickel cobaltite nanosheets as an efficient electrode material for high-performance hybrid supercapacitor

Periyasamy Sivakumar, Chellan Justin Raj, David Odhiambo Opar, Jeong Won Park, Hyun Jung

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Nickel cobalt oxide (NCO) is considered an auspicious electrode candidate for the reinforcement of energy-storage devices. Currently, an immense interest is devoted to modifying the morphological aspects of the NCO to boost their surface texture and electrochemical performances, which is feasible for the development of high energy density and durable devices. Herein, we report the synthesis of layered NCO nanosheets via solvothermal reaction by tuning the solvent volume ratio (water/N,N-Dimethylformamide [DMF]) for supercapacitor electrode material. The nickel cobalt oxide is prepared utilizing a 1:2 (DMF:water) ratio of solvent (NCO1) displays a controlled growth of 2D nanosheets with excellent surface texture. Moreover, NCO1 demonstrates the battery type charge storage properties with a maximum specific capacitance (Csp) of 731 F g−1, which is far better than NCO2 (623 F g−1) and NCO3 (556 F g−1) prepared in other solvent proportions. Besides, the constructed hybrid supercapacitor utilizing activated carbon (AC) and NCO1 as the negative and positive electrodes, respectively, exhibits the Csp of 120 F g−1, and maximum specific energy 37.33 W h kg−1 for the specific power 691.31 W kg−1 and demonstrates excellent stability ~80.56% for 20 000 cycles.

Original languageEnglish
Pages (from-to)16134-16144
Number of pages11
JournalInternational Journal of Energy Research
Volume45
Issue number11
DOIs
StatePublished - Sep 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 John Wiley & Sons Ltd.

Keywords

  • 2D nanosheet
  • NiCoO
  • energy storage
  • hybrid supercapacitor
  • solvothermal

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