Electrochemical characteristics of Co3O4 nanoparticles synthesized via the hydrothermal approach for supercapacitor applications
- Title
- Electrochemical characteristics of Co3O4 nanoparticles synthesized via the hydrothermal approach for supercapacitor applications
- Creator
- Babu C.R.; Avani A.V.; Shaji S.; Anila E.I.
- Description
- Cobalt oxide (Co3O4), a transition metal oxide known for its favourable capacitive properties and surface characteristics, is a promising candidate for electrode materials in supercapacitive energy storage applications. This study presents a comprehensive analysis of cobalt oxide nanoparticles synthesized through the hydrothermal method at varying synthesis temperatures, focusing on their structural, optical, electrochemical, and surface properties. X-ray diffraction analysis confirmed the cubic spinel structure of Co3O4, while Raman spectroscopy verified the phase composition of the nanoparticles. X-ray photoelectron spectroscopy offered insights into the near-surface chemistry of the synthesized material. The study determined two direct bandgaps of Co3O4 through absorption spectra and Tauc plots. To assess surface morphology and particle size distribution, field-emitting scanning electron microscopy and transmission electron microscopy were employed. Electrochemical investigations involved cyclic voltammetry and Nyquist plots, while galvanostatic chargedischarge tests demonstrated a specific capacitance (Csp) of 450 Fg?1 at 1 Ag?1. Impedance analysis indicated favourable capacitive behaviour with low charge transfer resistance. Furthermore, the study observed cyclic stability with a capacitive retention rate exceeding 88% at a current density of 20 Ag?1 over 10,000 cycles. The paper also discusses the capacitive and diffusion-controlled charge storage mechanisms at lower scan rates, emphasizing the potential of Co3O4 nanoparticles as the electrode material in the development of supercapacitor devices. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023.
- Source
- Journal of Solid State Electrochemistry, Vol-28, No. 7, pp. 2203-2210.
- Date
- 2024-01-01
- Publisher
- Springer Science and Business Media Deutschland GmbH
- Subject
- Diffusion-controlled; Hydrothermal method; Pseudocapacitors; Scan rates; Specific capacitance
- Coverage
- Babu C.R., Christ (Deemed to Be University), Karnataka, Bengaluru, 560029, India; Avani A.V., Christ (Deemed to Be University), Karnataka, Bengaluru, 560029, India; Shaji S., Autonomous University of Nuevo Le, San Nicolas de los Garza, 66451, Mexico; Anila E.I., Christ (Deemed to Be University), Karnataka, Bengaluru, 560029, India
- Rights
- Restricted Access
- Relation
- ISSN: 14328488
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Babu C.R.; Avani A.V.; Shaji S.; Anila E.I., “Electrochemical characteristics of Co3O4 nanoparticles synthesized via the hydrothermal approach for supercapacitor applications,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/13053.