Reduced graphene oxide-ZnO hollow microsphere composite for supercapacitor applications
Through a facile solvothermal synthesis process, a reduced graphene oxide-ZnO microsphere composite was produced at 180 °C for 24 hours. Raman spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy were used to analyze the morphological str...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universitas Mercu Buana
2025-05-01
|
| Series: | Jurnal Ilmiah SINERGI |
| Subjects: | |
| Online Access: | https://publikasi.mercubuana.ac.id/index.php/sinergi/article/view/31776 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849425684918697984 |
|---|---|
| author | Abqari Luthfi Albert Abdullah Shahidan Radiman Wee Siong Chiu Muhammad Azmi Abdul Hamid Fadhlul Wafi Badrudin |
| author_facet | Abqari Luthfi Albert Abdullah Shahidan Radiman Wee Siong Chiu Muhammad Azmi Abdul Hamid Fadhlul Wafi Badrudin |
| author_sort | Abqari Luthfi Albert Abdullah |
| collection | DOAJ |
| description | Through a facile solvothermal synthesis process, a reduced graphene oxide-ZnO microsphere composite was produced at 180 °C for 24 hours. Raman spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy were used to analyze the morphological structures of the material. The analysis revealed that hexagonal phase wurtzite ZnO nanoparticles assembled homogeneous microspheres, decorated on the graphene sheets by graphene oxide functional groups. The ZnO nanoparticles are about 30 nm in size and the microspheres are hollow. A possible growth mechanism for the formation of ZnO hollow microspheres anchored on graphene sheets has been proposed. Cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance were used to evaluate the electrochemical performance of the composite. At a scan rate of 1 mV/s, the reduced graphene oxide-ZnO hollow microsphere composite electrode demonstrated an enhanced specific capacitance of 40.70 F/g with energy and power densities of 5.75 Wh/kg and 1.97 kW/kg, respectively. |
| format | Article |
| id | doaj-art-64c683d2c63044e5b99f2ccefc9df73b |
| institution | Kabale University |
| issn | 1410-2331 2460-1217 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Universitas Mercu Buana |
| record_format | Article |
| series | Jurnal Ilmiah SINERGI |
| spelling | doaj-art-64c683d2c63044e5b99f2ccefc9df73b2025-08-20T03:29:40ZengUniversitas Mercu BuanaJurnal Ilmiah SINERGI1410-23312460-12172025-05-0129253954610.22441/sinergi.2025.2.0238304Reduced graphene oxide-ZnO hollow microsphere composite for supercapacitor applicationsAbqari Luthfi Albert Abdullah0Shahidan Radiman1Wee Siong Chiu2Muhammad Azmi Abdul Hamid3Fadhlul Wafi Badrudin4Physics Department, Centre for Defence Foundation Studies, Universiti Pertahanan Nasional MalaysiaSchool of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan MalaysiaDepartment of Physics, Faculty of Science, University of MalayaSchool of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan MalaysiaPhysics Department, Centre for Defence Foundation Studies, Universiti Pertahanan Nasional MalaysiaThrough a facile solvothermal synthesis process, a reduced graphene oxide-ZnO microsphere composite was produced at 180 °C for 24 hours. Raman spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy were used to analyze the morphological structures of the material. The analysis revealed that hexagonal phase wurtzite ZnO nanoparticles assembled homogeneous microspheres, decorated on the graphene sheets by graphene oxide functional groups. The ZnO nanoparticles are about 30 nm in size and the microspheres are hollow. A possible growth mechanism for the formation of ZnO hollow microspheres anchored on graphene sheets has been proposed. Cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance were used to evaluate the electrochemical performance of the composite. At a scan rate of 1 mV/s, the reduced graphene oxide-ZnO hollow microsphere composite electrode demonstrated an enhanced specific capacitance of 40.70 F/g with energy and power densities of 5.75 Wh/kg and 1.97 kW/kg, respectively.https://publikasi.mercubuana.ac.id/index.php/sinergi/article/view/31776compositesgraphenehollow spheresolvothermalzinc oxide |
| spellingShingle | Abqari Luthfi Albert Abdullah Shahidan Radiman Wee Siong Chiu Muhammad Azmi Abdul Hamid Fadhlul Wafi Badrudin Reduced graphene oxide-ZnO hollow microsphere composite for supercapacitor applications Jurnal Ilmiah SINERGI composites graphene hollow sphere solvothermal zinc oxide |
| title | Reduced graphene oxide-ZnO hollow microsphere composite for supercapacitor applications |
| title_full | Reduced graphene oxide-ZnO hollow microsphere composite for supercapacitor applications |
| title_fullStr | Reduced graphene oxide-ZnO hollow microsphere composite for supercapacitor applications |
| title_full_unstemmed | Reduced graphene oxide-ZnO hollow microsphere composite for supercapacitor applications |
| title_short | Reduced graphene oxide-ZnO hollow microsphere composite for supercapacitor applications |
| title_sort | reduced graphene oxide zno hollow microsphere composite for supercapacitor applications |
| topic | composites graphene hollow sphere solvothermal zinc oxide |
| url | https://publikasi.mercubuana.ac.id/index.php/sinergi/article/view/31776 |
| work_keys_str_mv | AT abqariluthfialbertabdullah reducedgrapheneoxideznohollowmicrospherecompositeforsupercapacitorapplications AT shahidanradiman reducedgrapheneoxideznohollowmicrospherecompositeforsupercapacitorapplications AT weesiongchiu reducedgrapheneoxideznohollowmicrospherecompositeforsupercapacitorapplications AT muhammadazmiabdulhamid reducedgrapheneoxideznohollowmicrospherecompositeforsupercapacitorapplications AT fadhlulwafibadrudin reducedgrapheneoxideznohollowmicrospherecompositeforsupercapacitorapplications |