One-Dimensional Nanoscale Si/Co Based on Layered Double Hydroxides towards Electrochemical Supercapacitor Electrodes
It is well known that layered double hydroxides (LDHs) are two-dimensional (2D) layered compounds. However, we modified these 2D layered compounds to become one-dimensional (1D) nanostructures destined for high-performance supercapacitors applications. In this direction, silicon was inserted inside...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-04-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/12/9/1404 |
| _version_ | 1827671957357723648 |
|---|---|
| author | Osama Saber Sajid Ali Ansari Aya Osama Mostafa Osama |
| author_facet | Osama Saber Sajid Ali Ansari Aya Osama Mostafa Osama |
| author_sort | Osama Saber |
| collection | DOAJ |
| description | It is well known that layered double hydroxides (LDHs) are two-dimensional (2D) layered compounds. However, we modified these 2D layered compounds to become one-dimensional (1D) nanostructures destined for high-performance supercapacitors applications. In this direction, silicon was inserted inside the nanolayers of Co-LDHs producing nanofibers of Si/Co LDHs through the intercalation of cyanate anions as pillars for building nanolayered structures. Additionally, nanoparticles were observed by controlling the preparation conditions and the silicon percentage. Scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and thermal analyses have been used to characterize the nanolayered structures of Si/Co LDHs. The electrochemical characterization was performed by cyclic voltammetry and galvanic charge–discharge technique in 2M KOH electrolyte solution using three-electrode cell system. The calculated specific capacitance results indicated that the change of morphology from nanoparticles or plates to nanofibers had a positive effect for improving the performance of specific capacitance of Si/Co LDHs. The specific capacitance enhanced to be 621.5 F g<sup>−1</sup> in the case of the nanofiber of Si/Co LDHs. Similarly, the excellent cyclic stability (84.5%) was observed for the nanofiber. These results were explained through the attribute of the nanofibrous morphology and synergistic effects between the electric double layer capacitive character of the silicon and the pseudo capacitance nature of the cobalt. The high capacitance of ternary Si/Co/cyanate LDHs nanocomposites was suggested to be used as active electrode materials for high-performance supercapacitors applications. |
| first_indexed | 2024-03-10T03:52:59Z |
| format | Article |
| id | doaj.art-ba07ba5e1bdf42e290aca7f6866a6d54 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T03:52:59Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-ba07ba5e1bdf42e290aca7f6866a6d542023-11-23T08:53:41ZengMDPI AGNanomaterials2079-49912022-04-01129140410.3390/nano12091404One-Dimensional Nanoscale Si/Co Based on Layered Double Hydroxides towards Electrochemical Supercapacitor ElectrodesOsama Saber0Sajid Ali Ansari1Aya Osama2Mostafa Osama3Department of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaIt is well known that layered double hydroxides (LDHs) are two-dimensional (2D) layered compounds. However, we modified these 2D layered compounds to become one-dimensional (1D) nanostructures destined for high-performance supercapacitors applications. In this direction, silicon was inserted inside the nanolayers of Co-LDHs producing nanofibers of Si/Co LDHs through the intercalation of cyanate anions as pillars for building nanolayered structures. Additionally, nanoparticles were observed by controlling the preparation conditions and the silicon percentage. Scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and thermal analyses have been used to characterize the nanolayered structures of Si/Co LDHs. The electrochemical characterization was performed by cyclic voltammetry and galvanic charge–discharge technique in 2M KOH electrolyte solution using three-electrode cell system. The calculated specific capacitance results indicated that the change of morphology from nanoparticles or plates to nanofibers had a positive effect for improving the performance of specific capacitance of Si/Co LDHs. The specific capacitance enhanced to be 621.5 F g<sup>−1</sup> in the case of the nanofiber of Si/Co LDHs. Similarly, the excellent cyclic stability (84.5%) was observed for the nanofiber. These results were explained through the attribute of the nanofibrous morphology and synergistic effects between the electric double layer capacitive character of the silicon and the pseudo capacitance nature of the cobalt. The high capacitance of ternary Si/Co/cyanate LDHs nanocomposites was suggested to be used as active electrode materials for high-performance supercapacitors applications.https://www.mdpi.com/2079-4991/12/9/1404Si/Co LDHs1D nanostructuresnanofiberscyclic voltammetrycharge–discharge methodsupercapacitors |
| spellingShingle | Osama Saber Sajid Ali Ansari Aya Osama Mostafa Osama One-Dimensional Nanoscale Si/Co Based on Layered Double Hydroxides towards Electrochemical Supercapacitor Electrodes Nanomaterials Si/Co LDHs 1D nanostructures nanofibers cyclic voltammetry charge–discharge method supercapacitors |
| title | One-Dimensional Nanoscale Si/Co Based on Layered Double Hydroxides towards Electrochemical Supercapacitor Electrodes |
| title_full | One-Dimensional Nanoscale Si/Co Based on Layered Double Hydroxides towards Electrochemical Supercapacitor Electrodes |
| title_fullStr | One-Dimensional Nanoscale Si/Co Based on Layered Double Hydroxides towards Electrochemical Supercapacitor Electrodes |
| title_full_unstemmed | One-Dimensional Nanoscale Si/Co Based on Layered Double Hydroxides towards Electrochemical Supercapacitor Electrodes |
| title_short | One-Dimensional Nanoscale Si/Co Based on Layered Double Hydroxides towards Electrochemical Supercapacitor Electrodes |
| title_sort | one dimensional nanoscale si co based on layered double hydroxides towards electrochemical supercapacitor electrodes |
| topic | Si/Co LDHs 1D nanostructures nanofibers cyclic voltammetry charge–discharge method supercapacitors |
| url | https://www.mdpi.com/2079-4991/12/9/1404 |
| work_keys_str_mv | AT osamasaber onedimensionalnanoscalesicobasedonlayereddoublehydroxidestowardselectrochemicalsupercapacitorelectrodes AT sajidaliansari onedimensionalnanoscalesicobasedonlayereddoublehydroxidestowardselectrochemicalsupercapacitorelectrodes AT ayaosama onedimensionalnanoscalesicobasedonlayereddoublehydroxidestowardselectrochemicalsupercapacitorelectrodes AT mostafaosama onedimensionalnanoscalesicobasedonlayereddoublehydroxidestowardselectrochemicalsupercapacitorelectrodes |