Modified Activated Graphene-Based Carbon Electrodes from Rice Husk for Supercapacitor Applications
The renewable biomass material obtained from rice husk, a low-cost agricultural waste, was used as a precursor to synthesize a highly porous graphene-based carbon as electrode material for supercapacitors. Activated graphene-based carbon (AGC) was obtained by a two-step chemical procedure and exhibi...
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| Format: | Article |
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MDPI AG
2020-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/18/4943 |
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| author | Mukhtar Yeleuov Christopher Seidl Tolganay Temirgaliyeva Azamat Taurbekov Nicholay Prikhodko Bakytzhan Lesbayev Fail Sultanov Chingis Daulbayev Serik Kumekov |
| author_facet | Mukhtar Yeleuov Christopher Seidl Tolganay Temirgaliyeva Azamat Taurbekov Nicholay Prikhodko Bakytzhan Lesbayev Fail Sultanov Chingis Daulbayev Serik Kumekov |
| author_sort | Mukhtar Yeleuov |
| collection | DOAJ |
| description | The renewable biomass material obtained from rice husk, a low-cost agricultural waste, was used as a precursor to synthesize a highly porous graphene-based carbon as electrode material for supercapacitors. Activated graphene-based carbon (AGC) was obtained by a two-step chemical procedure and exhibited a very high specific surface area (SSA) of 3292 m<sup>2</sup> g<sup>−1</sup>. The surface morphology of the synthesized materials was studied using scanning and transmission electron microscopy (SEM, TEM). Furthermore, the AGC was modified with nickel hydroxide Ni(OH)<sub>2</sub> through a simple chemical precipitation method. It was found that the most significant increase in capacitance could be reached with Ni(OH)<sub>2</sub> loadings of around 9 wt.%. The measured specific capacitance of the pure AGC supercapacitor electrodes was 236 F g<sup>−1</sup>, whereas electrodes from the material modified with 9 wt.% Ni(OH)<sub>2</sub> showed a specific capacitance of up to 300 F g<sup>−1</sup> at a current density of 50 mA g<sup>−1</sup>. The increase in specific capacitance achieved due to chemical modification was, therefore 27%. |
| first_indexed | 2024-03-10T16:10:19Z |
| format | Article |
| id | doaj.art-1b8e447f04cb4808ab7696af57fecbb8 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T16:10:19Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-1b8e447f04cb4808ab7696af57fecbb82023-11-20T14:28:09ZengMDPI AGEnergies1996-10732020-09-011318494310.3390/en13184943Modified Activated Graphene-Based Carbon Electrodes from Rice Husk for Supercapacitor ApplicationsMukhtar Yeleuov0Christopher Seidl1Tolganay Temirgaliyeva2Azamat Taurbekov3Nicholay Prikhodko4Bakytzhan Lesbayev5Fail Sultanov6Chingis Daulbayev7Serik Kumekov8Department of Engineering Physics, Satbayev University, Almaty 050013, KazakhstanFaculty of Engineering & Natural Sciences, Johannes Kepler University Linz, 4040 Linz, AustriaLaboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, KazakhstanLaboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, KazakhstanLaboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, KazakhstanLaboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, KazakhstanLaboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, KazakhstanDepartment of Engineering Physics, Satbayev University, Almaty 050013, KazakhstanDepartment of Engineering Physics, Satbayev University, Almaty 050013, KazakhstanThe renewable biomass material obtained from rice husk, a low-cost agricultural waste, was used as a precursor to synthesize a highly porous graphene-based carbon as electrode material for supercapacitors. Activated graphene-based carbon (AGC) was obtained by a two-step chemical procedure and exhibited a very high specific surface area (SSA) of 3292 m<sup>2</sup> g<sup>−1</sup>. The surface morphology of the synthesized materials was studied using scanning and transmission electron microscopy (SEM, TEM). Furthermore, the AGC was modified with nickel hydroxide Ni(OH)<sub>2</sub> through a simple chemical precipitation method. It was found that the most significant increase in capacitance could be reached with Ni(OH)<sub>2</sub> loadings of around 9 wt.%. The measured specific capacitance of the pure AGC supercapacitor electrodes was 236 F g<sup>−1</sup>, whereas electrodes from the material modified with 9 wt.% Ni(OH)<sub>2</sub> showed a specific capacitance of up to 300 F g<sup>−1</sup> at a current density of 50 mA g<sup>−1</sup>. The increase in specific capacitance achieved due to chemical modification was, therefore 27%.https://www.mdpi.com/1996-1073/13/18/4943supercapacitor electrodeactivated rice huskfew-layer graphenenickel hydroxide |
| spellingShingle | Mukhtar Yeleuov Christopher Seidl Tolganay Temirgaliyeva Azamat Taurbekov Nicholay Prikhodko Bakytzhan Lesbayev Fail Sultanov Chingis Daulbayev Serik Kumekov Modified Activated Graphene-Based Carbon Electrodes from Rice Husk for Supercapacitor Applications Energies supercapacitor electrode activated rice husk few-layer graphene nickel hydroxide |
| title | Modified Activated Graphene-Based Carbon Electrodes from Rice Husk for Supercapacitor Applications |
| title_full | Modified Activated Graphene-Based Carbon Electrodes from Rice Husk for Supercapacitor Applications |
| title_fullStr | Modified Activated Graphene-Based Carbon Electrodes from Rice Husk for Supercapacitor Applications |
| title_full_unstemmed | Modified Activated Graphene-Based Carbon Electrodes from Rice Husk for Supercapacitor Applications |
| title_short | Modified Activated Graphene-Based Carbon Electrodes from Rice Husk for Supercapacitor Applications |
| title_sort | modified activated graphene based carbon electrodes from rice husk for supercapacitor applications |
| topic | supercapacitor electrode activated rice husk few-layer graphene nickel hydroxide |
| url | https://www.mdpi.com/1996-1073/13/18/4943 |
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