An Investigation of the Electrochemical Properties of CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> Composite as Binder-Free Electrodes of a Supercapacitor
Metallic oxides are considered promising candidates for supercapacitors owing to their inherent pseudocapacitive behavior and superior electrochemical properties. In this work, NiCo<sub>2</sub>O<sub>4</sub>, CuCo<sub>2</sub>O<sub>4</sub>, and CuCo<s...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/11/3237 |
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| author | Bushra Nawaz Muhammad Obaid Ullah Ghulam Ali |
| author_facet | Bushra Nawaz Muhammad Obaid Ullah Ghulam Ali |
| author_sort | Bushra Nawaz |
| collection | DOAJ |
| description | Metallic oxides are considered promising candidates for supercapacitors owing to their inherent pseudocapacitive behavior and superior electrochemical properties. In this work, NiCo<sub>2</sub>O<sub>4</sub>, CuCo<sub>2</sub>O<sub>4</sub>, and CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> composite electrodes are synthesized directly on a nickel foam substrate via the facile hydrothermal method. The phase of the prepared materials was analyzed using the X-ray diffraction method. The morphology of the prepared binder-free electrodes was observed by scanning electron microscopy. The electrochemical testing was done in a 2 M KOH solution against an Ag/AgCl reference electrode. The CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> composite electrode demonstrated a value of specific capacitance as high as 422 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup> and thus outperformed the NiCo<sub>2</sub>O<sub>4</sub> and CuCo<sub>2</sub>O<sub>4</sub> in terms of its electrochemical performance. The CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> composite retained a specific capacitance of 278 F g<sup>−1</sup> even with the increase of current density to 10 A g<sup>−1</sup>, which corresponds to a 34% loss of capacitance compared to 40% and 48% of individual NiCo<sub>2</sub>O<sub>4</sub> and CuCo<sub>2</sub>O<sub>4</sub> electrodes, respectively. Hence, the synergy in a composite material demonstrates it to be a potential candidate as an electrode in supercapacitors. |
| first_indexed | 2024-03-10T10:47:27Z |
| format | Article |
| id | doaj.art-06ac6419075a4dab8a10b684576214f2 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T10:47:27Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-06ac6419075a4dab8a10b684576214f22023-11-21T22:26:09ZengMDPI AGEnergies1996-10732021-06-011411323710.3390/en14113237An Investigation of the Electrochemical Properties of CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> Composite as Binder-Free Electrodes of a SupercapacitorBushra Nawaz0Muhammad Obaid Ullah1Ghulam Ali2Department of Electronics Engineering, University of Engineering and Technology Taxila, Taxila 47080, PakistanDepartment of Electrical Engineering, University of Engineering and Technology Taxila, Taxila 47080, PakistanU.S.-Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, PakistanMetallic oxides are considered promising candidates for supercapacitors owing to their inherent pseudocapacitive behavior and superior electrochemical properties. In this work, NiCo<sub>2</sub>O<sub>4</sub>, CuCo<sub>2</sub>O<sub>4</sub>, and CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> composite electrodes are synthesized directly on a nickel foam substrate via the facile hydrothermal method. The phase of the prepared materials was analyzed using the X-ray diffraction method. The morphology of the prepared binder-free electrodes was observed by scanning electron microscopy. The electrochemical testing was done in a 2 M KOH solution against an Ag/AgCl reference electrode. The CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> composite electrode demonstrated a value of specific capacitance as high as 422 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup> and thus outperformed the NiCo<sub>2</sub>O<sub>4</sub> and CuCo<sub>2</sub>O<sub>4</sub> in terms of its electrochemical performance. The CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> composite retained a specific capacitance of 278 F g<sup>−1</sup> even with the increase of current density to 10 A g<sup>−1</sup>, which corresponds to a 34% loss of capacitance compared to 40% and 48% of individual NiCo<sub>2</sub>O<sub>4</sub> and CuCo<sub>2</sub>O<sub>4</sub> electrodes, respectively. Hence, the synergy in a composite material demonstrates it to be a potential candidate as an electrode in supercapacitors.https://www.mdpi.com/1996-1073/14/11/3237metallic oxidessupercapacitorscomposite electrodesbinder-freeCuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> |
| spellingShingle | Bushra Nawaz Muhammad Obaid Ullah Ghulam Ali An Investigation of the Electrochemical Properties of CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> Composite as Binder-Free Electrodes of a Supercapacitor Energies metallic oxides supercapacitors composite electrodes binder-free CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> |
| title | An Investigation of the Electrochemical Properties of CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> Composite as Binder-Free Electrodes of a Supercapacitor |
| title_full | An Investigation of the Electrochemical Properties of CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> Composite as Binder-Free Electrodes of a Supercapacitor |
| title_fullStr | An Investigation of the Electrochemical Properties of CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> Composite as Binder-Free Electrodes of a Supercapacitor |
| title_full_unstemmed | An Investigation of the Electrochemical Properties of CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> Composite as Binder-Free Electrodes of a Supercapacitor |
| title_short | An Investigation of the Electrochemical Properties of CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> Composite as Binder-Free Electrodes of a Supercapacitor |
| title_sort | investigation of the electrochemical properties of cuco sub 2 sub o sub 4 sub nico sub 2 sub o sub 4 sub composite as binder free electrodes of a supercapacitor |
| topic | metallic oxides supercapacitors composite electrodes binder-free CuCo<sub>2</sub>O<sub>4</sub>@NiCo<sub>2</sub>O<sub>4</sub> |
| url | https://www.mdpi.com/1996-1073/14/11/3237 |
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