One-step synthesis of 3D sulfur-doped porous carbon with multilevel pore structure for high-rate supercapacitors
| Autor: | Jingyang Tian, Zhenghui Li, Zhangming Liu, Gai Qin, Haiyan Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Supercapacitor
Materials science Renewable Energy Sustainability and the Environment Sodium lignosulfonate Carbonization Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Capacitance 0104 chemical sciences chemistry.chemical_compound Fuel Technology chemistry Chemical engineering Specific surface area 0210 nano-technology Porosity Current density Carbon |
| Zdroj: | International Journal of Hydrogen Energy. 43:1596-1605 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2017.11.091 |
| Popis: | In this work, three-dimensional (3D) interconnected S-doped porous carbon materials are fabricated using bio-waste sodium lignosulfonate as carbon and sulfur precursor by in situ carbonization and subsequent KOH activation process. The as-obtained S-PC-50 has high specific surface area of 1592 m2 g−1, high S weight percentage up to 5.2 wt% and interconnected porous framework consisting of micro-, meso- and macropores. As a result, the S-PC-50 exhibits a high specific capacitance of 320 F g−1 at 0.2 A g−1, excellent rate performance with 76.5% capacitance retention after a current density increasing from 2 A g−1 (200 F g−1) to 100 A g−1 (153 F g−1) and 99% capacitance retention after 10,000 cycles at 5 A g−1. Besides, the symmetric supercapacitor can deliver a high energy density up to 8.2 Wh kg−1 at 50 W kg−1. |
| Databáze: | OpenAIRE |
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