Gamma-irradiation assisted synthesis of nickel-cobalt oxide composites: Crystal structure dependency for supercapacitor efficiency
Issued Date
2025-02-05
Resource Type
ISSN
09258388
Scopus ID
2-s2.0-85216112220
Journal Title
Journal of Alloys and Compounds
Volume
1014
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Alloys and Compounds Vol.1014 (2025)
Suggested Citation
Trakulmututa J., Weerasuk B., Sataman P., Chutimasakul T., Kamonsuangkasem K., Smith S.M., Sirisit N., Sangtawesin T. Gamma-irradiation assisted synthesis of nickel-cobalt oxide composites: Crystal structure dependency for supercapacitor efficiency. Journal of Alloys and Compounds Vol.1014 (2025). doi:10.1016/j.jallcom.2025.178736 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/103147
Title
Gamma-irradiation assisted synthesis of nickel-cobalt oxide composites: Crystal structure dependency for supercapacitor efficiency
Corresponding Author(s)
Other Contributor(s)
Abstract
This study explored an innovative gamma-irradiation approach for the synthesis of nickel-cobalt oxide (NCO) composites for advanced supercapacitors. Varying irradiation doses facilitated the formation of mixed-phase structures, where XRD analysis revealed a dose-dependent relationship between rock-salt (NiO or NiCoO₂) and spinel (Co₃O₄ or NiCo₂O₄) phases. The composite synthesized at 300 kGy (300NCO) achieved a specific capacitance of 73 F.g−1. Furthermore, the diluted-precursor method for preparation NCO at 300 kGy (300NCO_D) demonstrated a better electrochemical performance than 300NCO, achieving a specific capacitance of 103.5 F.g−1. Additionally, gamma-irradiation treatment at 5 kGy applied to the 300NCO_D electrode in a Swagelok cell improved long-term stability, retaining 92 % capacitance over 10,000 cycles. This study highlights gamma irradiation as a clean and scalable method to significantly tune phase formation in bimetallic oxides, advancing energy storage technology by enhancing electrode uniformity and stability.