1.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic Electrolyte
The specific energy of an aqueous carbon supercapacitor is generally small, resulting mainly from a narrow potential window of aqueous electrolytes. Here, we introduced agarose, an ecologically compatible polymer, as a novel binder to fabricate an activated carbon supercapacitor, enabling a wider po...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/7/1731 |
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| author | Chih-Chung Lai Feng-Hao Hsu Su-Yang Hsu Ming-Jay Deng Kueih-Tzu Lu Jin-Ming Chen |
| author_facet | Chih-Chung Lai Feng-Hao Hsu Su-Yang Hsu Ming-Jay Deng Kueih-Tzu Lu Jin-Ming Chen |
| author_sort | Chih-Chung Lai |
| collection | DOAJ |
| description | The specific energy of an aqueous carbon supercapacitor is generally small, resulting mainly from a narrow potential window of aqueous electrolytes. Here, we introduced agarose, an ecologically compatible polymer, as a novel binder to fabricate an activated carbon supercapacitor, enabling a wider potential window attributed to a high overpotential of the hydrogen-evolution reaction (HER) of agarose-bound activated carbons in sulfuric acid. Assembled symmetric aqueous cells can be galvanostatically cycled up to 1.8 V, attaining an enhanced energy density of 13.5 W h/kg (9.5 µW h/cm<sup>2</sup>) at 450 W/kg (315 µW/cm<sup>2</sup>). Furthermore, a great cycling behavior was obtained, with a 94.2% retention of capacitance after 10,000 cycles at 2 A/g. This work might guide the design of an alternative material for high-energy aqueous supercapacitors. |
| first_indexed | 2024-03-10T09:52:53Z |
| format | Article |
| id | doaj.art-746eebaa08c1486699dd8cc67ee26a19 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T09:52:53Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-746eebaa08c1486699dd8cc67ee26a192023-11-22T02:33:56ZengMDPI AGNanomaterials2079-49912021-06-01117173110.3390/nano110717311.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic ElectrolyteChih-Chung Lai0Feng-Hao Hsu1Su-Yang Hsu2Ming-Jay Deng3Kueih-Tzu Lu4Jin-Ming Chen5National Synchrotron Radiation Research Center, Hsinchu 30076, TaiwanNational Synchrotron Radiation Research Center, Hsinchu 30076, TaiwanNational Synchrotron Radiation Research Center, Hsinchu 30076, TaiwanDepartment of Applied Chemistry, Providence University, Taichung 43301, TaiwanNational Synchrotron Radiation Research Center, Hsinchu 30076, TaiwanNational Synchrotron Radiation Research Center, Hsinchu 30076, TaiwanThe specific energy of an aqueous carbon supercapacitor is generally small, resulting mainly from a narrow potential window of aqueous electrolytes. Here, we introduced agarose, an ecologically compatible polymer, as a novel binder to fabricate an activated carbon supercapacitor, enabling a wider potential window attributed to a high overpotential of the hydrogen-evolution reaction (HER) of agarose-bound activated carbons in sulfuric acid. Assembled symmetric aqueous cells can be galvanostatically cycled up to 1.8 V, attaining an enhanced energy density of 13.5 W h/kg (9.5 µW h/cm<sup>2</sup>) at 450 W/kg (315 µW/cm<sup>2</sup>). Furthermore, a great cycling behavior was obtained, with a 94.2% retention of capacitance after 10,000 cycles at 2 A/g. This work might guide the design of an alternative material for high-energy aqueous supercapacitors.https://www.mdpi.com/2079-4991/11/7/1731hydrogen-evolution reactionsupercapacitoragarose-bound activated carbon |
| spellingShingle | Chih-Chung Lai Feng-Hao Hsu Su-Yang Hsu Ming-Jay Deng Kueih-Tzu Lu Jin-Ming Chen 1.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic Electrolyte Nanomaterials hydrogen-evolution reaction supercapacitor agarose-bound activated carbon |
| title | 1.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic Electrolyte |
| title_full | 1.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic Electrolyte |
| title_fullStr | 1.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic Electrolyte |
| title_full_unstemmed | 1.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic Electrolyte |
| title_short | 1.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic Electrolyte |
| title_sort | 1 8 v aqueous symmetric carbon based supercapacitors with agarose bound activated carbons in an acidic electrolyte |
| topic | hydrogen-evolution reaction supercapacitor agarose-bound activated carbon |
| url | https://www.mdpi.com/2079-4991/11/7/1731 |
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