Supercapacitive performance of N-doped graphene/Mn3O4/Fe3O4 as an electrode material
Nitrogen-doped graphene (NDG) and mixed metal oxides have been attracting much attention as the combination of these materials resulted in enhanced electrochemical properties. In this study, a composite of nitrogen-doped graphene/manganese oxide/iron oxide (NDG/Mn3O4/Fe3O4) for a supercapacitor was...
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| Format: | Article |
| Language: | English |
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MDPI
2019
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| Online Access: | http://psasir.upm.edu.my/id/eprint/38422/ http://psasir.upm.edu.my/id/eprint/38422/1/38422.pdf |
| _version_ | 1848848875116298240 |
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| author | Chong, Beng Meng Azman, Nur Hawa Nabilah Mohd Abdah, Muhammad Amirul Aizat Sulaiman, Yusran |
| author_facet | Chong, Beng Meng Azman, Nur Hawa Nabilah Mohd Abdah, Muhammad Amirul Aizat Sulaiman, Yusran |
| author_sort | Chong, Beng Meng |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Nitrogen-doped graphene (NDG) and mixed metal oxides have been attracting much attention as the combination of these materials resulted in enhanced electrochemical properties. In this study, a composite of nitrogen-doped graphene/manganese oxide/iron oxide (NDG/Mn3O4/Fe3O4) for a supercapacitor was prepared through the hydrothermal method, followed by freeze-drying. Field emission scanning electron microscopy (FESEM) images revealed that the NDG/Mn3O4/Fe3O4 composite displayed wrinkled-like sheets morphology with Mn3O4 and Fe3O4 particles attached on the surface of NDG. The presence of NDG, Mn3O4, and Fe3O4 was characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The electrochemical studies revealed that the NDG/Mn3O4/Fe3O4 composite exhibited the highest specific capacitance (158.46 F/g) compared to NDG/Fe3O4 (130.41 F/g), NDG/Mn3O4 (147.55 F/g), and NDG (74.35 F/g) in 1 M Na2SO4 at a scan rate of 50 mV/s due to the synergistic effect between bimetallic oxides, which provide richer redox reaction and high conductivity. The galvanostatic charge discharge (GCD) result demonstrated that, at a current density of 0.5 A/g, the discharging time of NDG/Mn3O4/Fe3O4 is the longest compared to NDG/Mn3O4 and NDG/Fe3O4, indicating that it had the largest charge storage capacity. NDG/Mn3O4/Fe3O4 also exhibited the smallest resistance of charge transfer (Rct) value (1.35 Ω), showing its excellent charge transfer behavior at the interface region and good cyclic stability by manifesting a capacity retention of 100.4%, even after 5000 cycles. |
| first_indexed | 2025-11-15T09:41:27Z |
| format | Article |
| id | upm-38422 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:41:27Z |
| publishDate | 2019 |
| publisher | MDPI |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-384222020-05-04T16:54:02Z http://psasir.upm.edu.my/id/eprint/38422/ Supercapacitive performance of N-doped graphene/Mn3O4/Fe3O4 as an electrode material Chong, Beng Meng Azman, Nur Hawa Nabilah Mohd Abdah, Muhammad Amirul Aizat Sulaiman, Yusran Nitrogen-doped graphene (NDG) and mixed metal oxides have been attracting much attention as the combination of these materials resulted in enhanced electrochemical properties. In this study, a composite of nitrogen-doped graphene/manganese oxide/iron oxide (NDG/Mn3O4/Fe3O4) for a supercapacitor was prepared through the hydrothermal method, followed by freeze-drying. Field emission scanning electron microscopy (FESEM) images revealed that the NDG/Mn3O4/Fe3O4 composite displayed wrinkled-like sheets morphology with Mn3O4 and Fe3O4 particles attached on the surface of NDG. The presence of NDG, Mn3O4, and Fe3O4 was characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The electrochemical studies revealed that the NDG/Mn3O4/Fe3O4 composite exhibited the highest specific capacitance (158.46 F/g) compared to NDG/Fe3O4 (130.41 F/g), NDG/Mn3O4 (147.55 F/g), and NDG (74.35 F/g) in 1 M Na2SO4 at a scan rate of 50 mV/s due to the synergistic effect between bimetallic oxides, which provide richer redox reaction and high conductivity. The galvanostatic charge discharge (GCD) result demonstrated that, at a current density of 0.5 A/g, the discharging time of NDG/Mn3O4/Fe3O4 is the longest compared to NDG/Mn3O4 and NDG/Fe3O4, indicating that it had the largest charge storage capacity. NDG/Mn3O4/Fe3O4 also exhibited the smallest resistance of charge transfer (Rct) value (1.35 Ω), showing its excellent charge transfer behavior at the interface region and good cyclic stability by manifesting a capacity retention of 100.4%, even after 5000 cycles. MDPI 2019 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/38422/1/38422.pdf Chong, Beng Meng and Azman, Nur Hawa Nabilah and Mohd Abdah, Muhammad Amirul Aizat and Sulaiman, Yusran (2019) Supercapacitive performance of N-doped graphene/Mn3O4/Fe3O4 as an electrode material. Applied Sciences, 9 (6). art. no. 1040. pp. 1-12. ISSN 2076-3417 https://www.mdpi.com/2076-3417/9/6/1040 10.3390/app9061040 |
| spellingShingle | Chong, Beng Meng Azman, Nur Hawa Nabilah Mohd Abdah, Muhammad Amirul Aizat Sulaiman, Yusran Supercapacitive performance of N-doped graphene/Mn3O4/Fe3O4 as an electrode material |
| title | Supercapacitive performance of N-doped graphene/Mn3O4/Fe3O4 as an electrode material |
| title_full | Supercapacitive performance of N-doped graphene/Mn3O4/Fe3O4 as an electrode material |
| title_fullStr | Supercapacitive performance of N-doped graphene/Mn3O4/Fe3O4 as an electrode material |
| title_full_unstemmed | Supercapacitive performance of N-doped graphene/Mn3O4/Fe3O4 as an electrode material |
| title_short | Supercapacitive performance of N-doped graphene/Mn3O4/Fe3O4 as an electrode material |
| title_sort | supercapacitive performance of n-doped graphene/mn3o4/fe3o4 as an electrode material |
| url | http://psasir.upm.edu.my/id/eprint/38422/ http://psasir.upm.edu.my/id/eprint/38422/ http://psasir.upm.edu.my/id/eprint/38422/ http://psasir.upm.edu.my/id/eprint/38422/1/38422.pdf |