Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor
Lamellar activated carbons derived from Konjac sponges (KACs) have been successfully fabricated through a facile KOH activation method. By manipulating the activation temperature and KOH/C ratio, the achieved KACs exhibit ultrahigh specific surface area up to ∼3000 m2/g and hierarchical pore structu...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Journal of Nanotechnology |
| Online Access: | http://dx.doi.org/10.1155/2018/1358984 |
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| author | Bing Han Chongchong Geng Gong Cheng |
| author_facet | Bing Han Chongchong Geng Gong Cheng |
| author_sort | Bing Han |
| collection | DOAJ |
| description | Lamellar activated carbons derived from Konjac sponges (KACs) have been successfully fabricated through a facile KOH activation method. By manipulating the activation temperature and KOH/C ratio, the achieved KACs exhibit ultrahigh specific surface area up to ∼3000 m2/g and hierarchical pore structure with tunable micro/mesopore distribution. Notably, KACs possess plenty of worm-shaped micropores formed by graphene stacking layers with the lateral distance close to size of hydrated electrolyte ions. Owing to optimized pore structure, high graphitization, and extra O/N doping, KACs exhibited much enhanced specific capacitance (253.0 F/g), superior rate ability (77% retention of capacitance at 10 A/g), and remarkable cycling stability (0.4% decay under 5 A/g after 2000 cycles) in the acid electrolyte. The mass production ability of KAC materials and the knowledge of correlation between texture properties and capacitive performance open new opportunities for the application of such novel biomass-derived carbons in supercapacitor devices. |
| format | Article |
| id | doaj-art-18fcdec6179a49efbceb28edee13cc14 |
| institution | OA Journals |
| issn | 1687-9503 1687-9511 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Nanotechnology |
| spelling | doaj-art-18fcdec6179a49efbceb28edee13cc142025-08-20T02:02:15ZengWileyJournal of Nanotechnology1687-95031687-95112018-01-01201810.1155/2018/13589841358984Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance SupercapacitorBing Han0Chongchong Geng1Gong Cheng2College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, ChinaCollege of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, ChinaCollege of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, ChinaLamellar activated carbons derived from Konjac sponges (KACs) have been successfully fabricated through a facile KOH activation method. By manipulating the activation temperature and KOH/C ratio, the achieved KACs exhibit ultrahigh specific surface area up to ∼3000 m2/g and hierarchical pore structure with tunable micro/mesopore distribution. Notably, KACs possess plenty of worm-shaped micropores formed by graphene stacking layers with the lateral distance close to size of hydrated electrolyte ions. Owing to optimized pore structure, high graphitization, and extra O/N doping, KACs exhibited much enhanced specific capacitance (253.0 F/g), superior rate ability (77% retention of capacitance at 10 A/g), and remarkable cycling stability (0.4% decay under 5 A/g after 2000 cycles) in the acid electrolyte. The mass production ability of KAC materials and the knowledge of correlation between texture properties and capacitive performance open new opportunities for the application of such novel biomass-derived carbons in supercapacitor devices.http://dx.doi.org/10.1155/2018/1358984 |
| spellingShingle | Bing Han Chongchong Geng Gong Cheng Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor Journal of Nanotechnology |
| title | Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor |
| title_full | Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor |
| title_fullStr | Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor |
| title_full_unstemmed | Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor |
| title_short | Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor |
| title_sort | konjac sponge derived carbon flakes with optimized pore structure for high performance supercapacitor |
| url | http://dx.doi.org/10.1155/2018/1358984 |
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