Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance Supercapacitors
Herein, for the first time, the growth of ZnO nanorods directly on aluminum (Al) substrate via a low temperature (80 °C) wet chemical method, and used as binder-free electrode for supercapacitors were reported. XRD pattern and HRTEM images showed that high crystalline nanorods grown on Al substrate...
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MDPI AG
2020-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/10/1979 |
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| author | Faheem Ahmed Ghzzai Almutairi Bandar AlOtaibi Shalendra Kumar Nishat Arshi Syed Ghazanfar Hussain Ahmad Umar Naushad Ahmad Abdullah Aljaafari |
| author_facet | Faheem Ahmed Ghzzai Almutairi Bandar AlOtaibi Shalendra Kumar Nishat Arshi Syed Ghazanfar Hussain Ahmad Umar Naushad Ahmad Abdullah Aljaafari |
| author_sort | Faheem Ahmed |
| collection | DOAJ |
| description | Herein, for the first time, the growth of ZnO nanorods directly on aluminum (Al) substrate via a low temperature (80 °C) wet chemical method, and used as binder-free electrode for supercapacitors were reported. XRD pattern and HRTEM images showed that high crystalline nanorods grown on Al substrate with c-axis orientation. Morphological studies revealed that the nanorods possessed well defined hexagon phase with length and diameter of ~2 µm and 100–180 nm, respectively. Raman spectrum of ZnO nanorods showed that the characteristic E<sub>2H</sub> mode corresponds to the vibration associated with the oxygen atoms of ZnO. The optical properties of ZnO nanorods studied using Room-temperature PL spectra revealed a near-band-edge (NBE) peak at ~388 nm emission and deep level (DLE) at ~507 nm. Electrochemical measurements showed that ZnO nanorods on Al substrate exhibited remarkably enhanced performance as electrode for supercapacitors with a value of specific capacitance of 394 F g<sup>−1</sup> measured with scan rate of 20 mV s<sup>−1</sup>. This unique nanorods structures also exhibited excellent stability of >98% capacitance retention for 1000 cycles that were measured at 1A g<sup>−1</sup>. The presented easy and cost-effective method might open up the possibility for the mass production of binder-free electrodes for efficient electrochemical energy storage devices. |
| first_indexed | 2024-03-10T15:49:00Z |
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| id | doaj.art-99f17afaba314d928297071ad914d289 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T15:49:00Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-99f17afaba314d928297071ad914d2892023-11-20T16:15:43ZengMDPI AGNanomaterials2079-49912020-10-011010197910.3390/nano10101979Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance SupercapacitorsFaheem Ahmed0Ghzzai Almutairi1Bandar AlOtaibi2Shalendra Kumar3Nishat Arshi4Syed Ghazanfar Hussain5Ahmad Umar6Naushad Ahmad7Abdullah Aljaafari8Department of Physics, College of Science, King Faisal University, P.O. Box-400, Al-Ahsa 31982, Saudi ArabiaNational Center for Energy Storage Technologies, King Abdulaziz City for Science and Technology (KACST), Riyadh 12354, Saudi ArabiaNational Center for Energy Storage Technologies, King Abdulaziz City for Science and Technology (KACST), Riyadh 12354, Saudi ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box-400, Al-Ahsa 31982, Saudi ArabiaDepartment of Basic Sciences, Preparatory Year Deanship, King Faisal University, Al-Ahsa 31982, Saudi ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box-400, Al-Ahsa 31982, Saudi ArabiaDepartment of Chemistry, Faculty of Science and Arts, NajranUniversity, Najran 11001, Saudi ArabiaDepartment of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box-400, Al-Ahsa 31982, Saudi ArabiaHerein, for the first time, the growth of ZnO nanorods directly on aluminum (Al) substrate via a low temperature (80 °C) wet chemical method, and used as binder-free electrode for supercapacitors were reported. XRD pattern and HRTEM images showed that high crystalline nanorods grown on Al substrate with c-axis orientation. Morphological studies revealed that the nanorods possessed well defined hexagon phase with length and diameter of ~2 µm and 100–180 nm, respectively. Raman spectrum of ZnO nanorods showed that the characteristic E<sub>2H</sub> mode corresponds to the vibration associated with the oxygen atoms of ZnO. The optical properties of ZnO nanorods studied using Room-temperature PL spectra revealed a near-band-edge (NBE) peak at ~388 nm emission and deep level (DLE) at ~507 nm. Electrochemical measurements showed that ZnO nanorods on Al substrate exhibited remarkably enhanced performance as electrode for supercapacitors with a value of specific capacitance of 394 F g<sup>−1</sup> measured with scan rate of 20 mV s<sup>−1</sup>. This unique nanorods structures also exhibited excellent stability of >98% capacitance retention for 1000 cycles that were measured at 1A g<sup>−1</sup>. The presented easy and cost-effective method might open up the possibility for the mass production of binder-free electrodes for efficient electrochemical energy storage devices.https://www.mdpi.com/2079-4991/10/10/1979ZnObinder-free electrodeX-ray diffractionsupercapacitorsnanorods |
| spellingShingle | Faheem Ahmed Ghzzai Almutairi Bandar AlOtaibi Shalendra Kumar Nishat Arshi Syed Ghazanfar Hussain Ahmad Umar Naushad Ahmad Abdullah Aljaafari Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance Supercapacitors Nanomaterials ZnO binder-free electrode X-ray diffraction supercapacitors nanorods |
| title | Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance Supercapacitors |
| title_full | Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance Supercapacitors |
| title_fullStr | Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance Supercapacitors |
| title_full_unstemmed | Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance Supercapacitors |
| title_short | Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance Supercapacitors |
| title_sort | binder free electrode based on zno nanorods directly grown on aluminum substrate for high performance supercapacitors |
| topic | ZnO binder-free electrode X-ray diffraction supercapacitors nanorods |
| url | https://www.mdpi.com/2079-4991/10/10/1979 |
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