Hierarchical Porous Activated Carbon Derived from Coconut Shell for Ultrahigh-Performance Supercapacitors
In this research, we successfully produced hierarchical porous activated carbon from biowaste employing one-step KOH activation and applied as ultrahigh-performance supercapacitor electrode materials. The coconut shell-derived activated carbon (CSAC) features a hierarchical porous structure in a hon...
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MDPI AG
2023-10-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/20/7187 |
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| author | Yawei Wang Yuhui Duan Xia Liang Liang Tang Lei Sun Ruirui Wang Shunhang Wei Huanan Huang Pinghua Yang Huanan Hu |
| author_facet | Yawei Wang Yuhui Duan Xia Liang Liang Tang Lei Sun Ruirui Wang Shunhang Wei Huanan Huang Pinghua Yang Huanan Hu |
| author_sort | Yawei Wang |
| collection | DOAJ |
| description | In this research, we successfully produced hierarchical porous activated carbon from biowaste employing one-step KOH activation and applied as ultrahigh-performance supercapacitor electrode materials. The coconut shell-derived activated carbon (CSAC) features a hierarchical porous structure in a honeycomb-like morphology, leading to a high specific surface area (2228 m<sup>2</sup> g<sup>−1</sup>) as well as a significant pore volume (1.07 cm<sup>3</sup> g<sup>−1</sup>). The initial test with the CSAC electrode, conducted in a 6 M KOH loaded symmetric supercapacitor, demonstrated an ultrahigh capacitance of 367 F g<sup>−1</sup> at a current density of 0.2 A g<sup>−1</sup> together with 92.09% retention after 10,000 cycles at 10 A g<sup>−1</sup>. More impressively, the zinc–ion hybrid supercapacitor using CSAC as a cathode achieves a high-rate capability (153 mAh g<sup>−1</sup> at 0.2 A g<sup>−1</sup> and 75 mAh g<sup>−1</sup> at 10 A g<sup>−1</sup>), high energy density (134.9 Wh kg<sup>−1</sup> at 175 W kg<sup>−1</sup>), as well as exceptional cycling stability (93.81% capacity retention after 10,000 cycles at 10 A g<sup>−1</sup>). Such work thus illuminates a new pathway for converting biowaste-derived carbons into materials for ultrahigh-performance energy storge applications. |
| first_indexed | 2024-03-10T21:00:56Z |
| format | Article |
| id | doaj.art-b1d00d1f1aea4d36b6a4b91820ca6869 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T21:00:56Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-b1d00d1f1aea4d36b6a4b91820ca68692023-11-19T17:34:02ZengMDPI AGMolecules1420-30492023-10-012820718710.3390/molecules28207187Hierarchical Porous Activated Carbon Derived from Coconut Shell for Ultrahigh-Performance SupercapacitorsYawei Wang0Yuhui Duan1Xia Liang2Liang Tang3Lei Sun4Ruirui Wang5Shunhang Wei6Huanan Huang7Pinghua Yang8Huanan Hu9School of Chemistry and Chemical Engineering, Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, ChinaInstitute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Jinan 250022, ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, ChinaSchool of Mathematical Information, Shaoxing University, Shaoxing 312000, ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, ChinaSchool of Chemistry and Chemical Engineering, Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, ChinaIn this research, we successfully produced hierarchical porous activated carbon from biowaste employing one-step KOH activation and applied as ultrahigh-performance supercapacitor electrode materials. The coconut shell-derived activated carbon (CSAC) features a hierarchical porous structure in a honeycomb-like morphology, leading to a high specific surface area (2228 m<sup>2</sup> g<sup>−1</sup>) as well as a significant pore volume (1.07 cm<sup>3</sup> g<sup>−1</sup>). The initial test with the CSAC electrode, conducted in a 6 M KOH loaded symmetric supercapacitor, demonstrated an ultrahigh capacitance of 367 F g<sup>−1</sup> at a current density of 0.2 A g<sup>−1</sup> together with 92.09% retention after 10,000 cycles at 10 A g<sup>−1</sup>. More impressively, the zinc–ion hybrid supercapacitor using CSAC as a cathode achieves a high-rate capability (153 mAh g<sup>−1</sup> at 0.2 A g<sup>−1</sup> and 75 mAh g<sup>−1</sup> at 10 A g<sup>−1</sup>), high energy density (134.9 Wh kg<sup>−1</sup> at 175 W kg<sup>−1</sup>), as well as exceptional cycling stability (93.81% capacity retention after 10,000 cycles at 10 A g<sup>−1</sup>). Such work thus illuminates a new pathway for converting biowaste-derived carbons into materials for ultrahigh-performance energy storge applications.https://www.mdpi.com/1420-3049/28/20/7187hierarchical porous activated carboncoconut shellsultrahigh-performanceKOH symmetric supercapacitorszinc–ion hybrid supercapacitors |
| spellingShingle | Yawei Wang Yuhui Duan Xia Liang Liang Tang Lei Sun Ruirui Wang Shunhang Wei Huanan Huang Pinghua Yang Huanan Hu Hierarchical Porous Activated Carbon Derived from Coconut Shell for Ultrahigh-Performance Supercapacitors Molecules hierarchical porous activated carbon coconut shells ultrahigh-performance KOH symmetric supercapacitors zinc–ion hybrid supercapacitors |
| title | Hierarchical Porous Activated Carbon Derived from Coconut Shell for Ultrahigh-Performance Supercapacitors |
| title_full | Hierarchical Porous Activated Carbon Derived from Coconut Shell for Ultrahigh-Performance Supercapacitors |
| title_fullStr | Hierarchical Porous Activated Carbon Derived from Coconut Shell for Ultrahigh-Performance Supercapacitors |
| title_full_unstemmed | Hierarchical Porous Activated Carbon Derived from Coconut Shell for Ultrahigh-Performance Supercapacitors |
| title_short | Hierarchical Porous Activated Carbon Derived from Coconut Shell for Ultrahigh-Performance Supercapacitors |
| title_sort | hierarchical porous activated carbon derived from coconut shell for ultrahigh performance supercapacitors |
| topic | hierarchical porous activated carbon coconut shells ultrahigh-performance KOH symmetric supercapacitors zinc–ion hybrid supercapacitors |
| url | https://www.mdpi.com/1420-3049/28/20/7187 |
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