Self‐Templating Synthesis of 3D Hollow Tubular Porous Carbon Derived from Straw Cellulose Waste with Excellent Performance for Supercapacitors
| Autor: | Beichen Xue, Xiao-Feng Wang, Qingling Wei, Lianghai Hu, Zhimin Chen, Jieshan Qiu, Xiaomin Yang, Zichen Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science General Chemical Engineering chemistry.chemical_element 02 engineering and technology Straw 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance 0104 chemical sciences chemistry.chemical_compound General Energy chemistry Chemical engineering Specific surface area Environmental Chemistry General Materials Science Cellulose 0210 nano-technology Carbon Power density |
| Zdroj: | ChemSusChem. 12:1390-1400 |
| ISSN: | 1864-564X 1864-5631 |
| DOI: | 10.1002/cssc.201802945 |
| Popis: | A three-dimensional hollow tubular porous carbon (SCPC) was prepared from straw cellulose waste through a self-templating method combined with NaOH activation. Straw cellulose acts both as carbon source and structural template. The obtained SCPC exhibits a 3D hierarchical porous network structure. SCPC has a high specific surface area, a high mesoporosity ratio, and a low resistivity, which make it display excellent electrochemical performance for supercapacitors. SCPC showed a high specific capacitance of 312.57 F g-1 in 6 m KOH at 0.5 A g-1 , an excellent rate performance of 281.32 F g-1 even at 15 A g-1 , and an outstanding cyclic stability of 92.93 % capacitance retention after 20 000 cycles at 1 A g-1 . SCPC-based supercapacitors can deliver an energy density of 8.67 Wh kg-1 at a power density of 3.50 kW kg-1 in 6 m KOH and an energy density of 28.56 Wh kg-1 at a power density of 14.09 kW kg-1 in 1 m Et4 NBF4 /PC, which demonstrates the possibility of applying SCPC in supercapacitors. This research not only offers a facile and sustainable method for the preparation of hierarchical porous carbon for electrochemical energy storage devices but also provides a highly efficient method for the utilization of biomass waste. |
| Databáze: | OpenAIRE |
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