Facile hydrothermal synthesis of carbon-coated cobalt ferrite spherical nanoparticles as a potential negative electrode for flexible supercapattery

Kalimuthu Vijaya Sankar, Sathyanarayanan Shanmugapriya, Subramani Surendran, Seong Chan Jun, Ramakrishnan Kalai Selvan

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Battery type electrodes would replace the currently available pseudocapacitive electrodes by the cause of high energy density and long discharge time. In this regard, battery type carbon coated CoFe2O4 spherical nanoparticles is prepared by the facile hydrothermal method and tested as the possible negative electrode for supercapattery applications. The phase purity, electronic states of elements, and the presence of carbon is inferred through various sophisticated techniques. The calculated surface area of CoFe2O4 and carbon coated CoFe2O4 are found to be 9 and 26 m2 g−1, respectively. The morphological analysis confirms the formation of uniform CoFe2O4 nanospheres (∼25 nm) with a thin layer of carbon coating (∼2 nm). The amorphous carbon coating over CoFe2O4 nanosphere is identified via high-resolution transmission electron microscope. The observed peak and plateau regions in the cyclic voltammogram and galvanostatic charge/discharge curves reveals the battery-type charge storage behaviour of the material. The carbon coated CoFe2O4 delivers the maximum length capacitance of 9.9 F m−1 at 1 mV s−1 with a useful lifespan over 5000 cycles. The electrochemical impedance spectroscopy reveals that the carbon-coated CoFe2O4 delivers the low charge transfer resistance than CoFe2O4. Further, the fabricated supercapattery provides the energy density of 160 × 10−8 Wh cm−1 at a power density of 67.2 μW cm−1. As well as, the device shows 93% of coulombic efficiency and 75% of the specific capacitance retention over 11,000 cycles. Overall, it is believed that the carbon-coated CoFe2O4 can serve as a good candidate for flexible supercapatteries.

Original languageEnglish
Pages (from-to)480-488
Number of pages9
JournalJournal of Colloid and Interface Science
Volume513
DOIs
Publication statusPublished - 2018 Mar 1

Fingerprint

Hydrothermal synthesis
Ferrite
Cobalt
Carbon
Nanoparticles
Electrodes
Nanospheres
Capacitance
Coatings
Amorphous carbon
Electronic states
cobalt ferrite
Electrochemical impedance spectroscopy
Chemical elements
Charge transfer
Electron microscopes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Cite this

Sankar, Kalimuthu Vijaya ; Shanmugapriya, Sathyanarayanan ; Surendran, Subramani ; Jun, Seong Chan ; Selvan, Ramakrishnan Kalai. / Facile hydrothermal synthesis of carbon-coated cobalt ferrite spherical nanoparticles as a potential negative electrode for flexible supercapattery. In: Journal of Colloid and Interface Science. 2018 ; Vol. 513. pp. 480-488.
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Facile hydrothermal synthesis of carbon-coated cobalt ferrite spherical nanoparticles as a potential negative electrode for flexible supercapattery. / Sankar, Kalimuthu Vijaya; Shanmugapriya, Sathyanarayanan; Surendran, Subramani; Jun, Seong Chan; Selvan, Ramakrishnan Kalai.

In: Journal of Colloid and Interface Science, Vol. 513, 01.03.2018, p. 480-488.

Research output: Contribution to journalArticle

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AU - Sankar, Kalimuthu Vijaya

AU - Shanmugapriya, Sathyanarayanan

AU - Surendran, Subramani

AU - Jun, Seong Chan

AU - Selvan, Ramakrishnan Kalai

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