Capacitive behavior of glucose-derived porous activated carbon with different morphologies
| Autor: | Xiu Cheng Zheng, Pan Li, Xiao Feng Guo, Dan Li, Xiao Ye Zhan, Guangping Zheng, Cui Ning Feng |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Capacitive sensing chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention law Specific surface area Materials Chemistry medicine Calcination Porosity Supercapacitor Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering Mechanics of Materials 0210 nano-technology Carbon Current density Activated carbon medicine.drug |
| Zdroj: | Journal of Alloys and Compounds. 805:426-435 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.07.093 |
| Popis: | Glucose-derived porous activated carbon materials (AGC-600-4 and AGC-180-x) are prepared using ZnCl2 as the etching agent via impregnation treatment and hydrothermal method followed by the calcination process. The analytic results indicate that the obtained materials exhibit higher specific surface area and superior double-layer capacitive behavior than the corresponding pristine carbon (GC-600 and GC-180) when used as electrode materials for supercapacitors. Moreover, compared with the AGC-600-4 nanosheets, the optimal AGC-180-4 microspheres have a high specific surface area of 1713 m2 g−1 and a maximum specific capacitance of 235.9 F g−1 at a current density of 1.0 A g−1 in the three-electrode system. Meanwhile, AGC-180-4 also exhibits better capacitive properties than AGC-600-4 in the two-electrode system, showing an excellent cyclic stability with a high energy density of 24.63 Wh kg−1 at the power density of 949.5 W kg−1. It is thus demonstrated that AGC-180-4 could be ideal electrode materials for supercapacitor due to its unique etched spherical structure and excellent electrochemical properties. |
| Databáze: | OpenAIRE |
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