Electrochemical Performance of Potassium Bromate Active Electrolyte for Laser-Induced KBr-Graphene Supercapacitor Electrodes
In this paper, we have reported a low-concentration active electrolyte of KBrO<sub>3</sub> for the supercapacitor’s application. The electrochemical processes were carried out in two concentrations of KBrO<sub>3</sub> with 0.2 and 0.4 M. Additionally, we have reported a novel...
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MDPI AG
2023-03-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/11/3/109 |
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| author | Nagih M. Shaalan Faheem Ahmed Shalendra Kumar Mohamad M. Ahmad Abdullah F. Al-Naim D. Hamad |
| author_facet | Nagih M. Shaalan Faheem Ahmed Shalendra Kumar Mohamad M. Ahmad Abdullah F. Al-Naim D. Hamad |
| author_sort | Nagih M. Shaalan |
| collection | DOAJ |
| description | In this paper, we have reported a low-concentration active electrolyte of KBrO<sub>3</sub> for the supercapacitor’s application. The electrochemical processes were carried out in two concentrations of KBrO<sub>3</sub> with 0.2 and 0.4 M. Additionally, we have reported a novel strategy for doping graphene during its fabrication process with a potassium bromide (KBr) solution. The chemical doping of graphene with KBr improved the electrochemical properties of graphene used as supercapacitors. HRTEM images confirmed the multi-layer graphene obtained by CO<sub>2</sub> laser based on polyimide. The effect of KBr on the graphene lattice has been studied using Raman spectroscopy. The two electrodes of graphene and KBr-doped graphene were subjected to the electrochemical properties study as a supercapacitor by electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge-discharge techniques. The results exhibited the successful method of graphene doping and the stability of using KBrO<sub>3</sub> as a suitable electrolyte for electrochemical processes with this lower molarity. The specific capacitance of the pristine graphene capacitor in 0.2 M of KBrO<sub>3</sub> was 33 Fg<sup>−1</sup>, while this value increased up to 70 Fg<sup>−1</sup> for KBr-doped graphene in 0.4 M of KBrO<sub>3</sub>. The specific capacity in mAhg<sup>−1</sup> has also increased twofold. The results exhibited the possibility of using KBrO<sub>3</sub> as an electrolyte. The supercapacitor performance almost showed good stability in the life cycle. |
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| language | English |
| last_indexed | 2024-03-11T06:23:42Z |
| publishDate | 2023-03-01 |
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| series | Inorganics |
| spelling | doaj.art-0c165a48a3af429c8fcfdd579412e7642023-11-17T11:45:07ZengMDPI AGInorganics2304-67402023-03-0111310910.3390/inorganics11030109Electrochemical Performance of Potassium Bromate Active Electrolyte for Laser-Induced KBr-Graphene Supercapacitor ElectrodesNagih M. Shaalan0Faheem Ahmed1Shalendra Kumar2Mohamad M. Ahmad3Abdullah F. Al-Naim4D. Hamad5Department 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 ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaPhysics Department, Faculty of Science, Assiut University, Assiut 71516, EgyptIn this paper, we have reported a low-concentration active electrolyte of KBrO<sub>3</sub> for the supercapacitor’s application. The electrochemical processes were carried out in two concentrations of KBrO<sub>3</sub> with 0.2 and 0.4 M. Additionally, we have reported a novel strategy for doping graphene during its fabrication process with a potassium bromide (KBr) solution. The chemical doping of graphene with KBr improved the electrochemical properties of graphene used as supercapacitors. HRTEM images confirmed the multi-layer graphene obtained by CO<sub>2</sub> laser based on polyimide. The effect of KBr on the graphene lattice has been studied using Raman spectroscopy. The two electrodes of graphene and KBr-doped graphene were subjected to the electrochemical properties study as a supercapacitor by electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge-discharge techniques. The results exhibited the successful method of graphene doping and the stability of using KBrO<sub>3</sub> as a suitable electrolyte for electrochemical processes with this lower molarity. The specific capacitance of the pristine graphene capacitor in 0.2 M of KBrO<sub>3</sub> was 33 Fg<sup>−1</sup>, while this value increased up to 70 Fg<sup>−1</sup> for KBr-doped graphene in 0.4 M of KBrO<sub>3</sub>. The specific capacity in mAhg<sup>−1</sup> has also increased twofold. The results exhibited the possibility of using KBrO<sub>3</sub> as an electrolyte. The supercapacitor performance almost showed good stability in the life cycle.https://www.mdpi.com/2304-6740/11/3/109KBr-graphenelaser-induced graphenesupercapacitorelectrochemicalKBrO<sub>3</sub> active electrolyte |
| spellingShingle | Nagih M. Shaalan Faheem Ahmed Shalendra Kumar Mohamad M. Ahmad Abdullah F. Al-Naim D. Hamad Electrochemical Performance of Potassium Bromate Active Electrolyte for Laser-Induced KBr-Graphene Supercapacitor Electrodes Inorganics KBr-graphene laser-induced graphene supercapacitor electrochemical KBrO<sub>3</sub> active electrolyte |
| title | Electrochemical Performance of Potassium Bromate Active Electrolyte for Laser-Induced KBr-Graphene Supercapacitor Electrodes |
| title_full | Electrochemical Performance of Potassium Bromate Active Electrolyte for Laser-Induced KBr-Graphene Supercapacitor Electrodes |
| title_fullStr | Electrochemical Performance of Potassium Bromate Active Electrolyte for Laser-Induced KBr-Graphene Supercapacitor Electrodes |
| title_full_unstemmed | Electrochemical Performance of Potassium Bromate Active Electrolyte for Laser-Induced KBr-Graphene Supercapacitor Electrodes |
| title_short | Electrochemical Performance of Potassium Bromate Active Electrolyte for Laser-Induced KBr-Graphene Supercapacitor Electrodes |
| title_sort | electrochemical performance of potassium bromate active electrolyte for laser induced kbr graphene supercapacitor electrodes |
| topic | KBr-graphene laser-induced graphene supercapacitor electrochemical KBrO<sub>3</sub> active electrolyte |
| url | https://www.mdpi.com/2304-6740/11/3/109 |
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