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Hierarchical porous carbon fabricated by NaCl-activated Artemisia argyi rod as electrode material for high-performance supercapacitor.
- Source :
- Ionics; Jun2022, Vol. 28 Issue 6, p2991-3000, 10p
- Publication Year :
- 2022
-
Abstract
- A cost-effective approach was applied to prepare hierarchical porous carbons by simple carbonization and NaCl activation of Artemisia argyi rod at different temperatures. The obtained Artemisia argyi rod–based porous carbon (AARC)-700 material possesses high specific surface area of 1141.8 m<superscript>2</superscript> g<superscript>−1</superscript> and has a hierarchical structure with rich micro-, meso-, and macropores. As electrode for supercapacitor, AARC-700 shows an outstanding electrochemical performance of 348.4 F g<superscript>−1</superscript> at 1 A g<superscript>−1</superscript> in 6 M KOH electrolyte and a superior capacitance of 140 F g<superscript>−1</superscript> at 100 A g<superscript>−1</superscript>. At a wide voltage window of 2.0 V, the energy density of the assembled symmetric supercapacitor (AARC-700//AARC-700) at a power density of 2.0 kW kg<superscript>−1</superscript> in 1.0 M Na<subscript>2</subscript>SO<subscript>4</subscript> aqueous electrolyte is as high as 32.06 Wh kg<superscript>−1</superscript>. Even at a high power density of 40 kW kg<superscript>−1</superscript>, a high energy density of 16.67 Wh kg<superscript>−1</superscript> can be achieved. Moreover, the symmetric supercapacitor shows capacitance retention of 99.7% after 20,000 continual charge/discharge cycles at a high current density of 5 A g<superscript>−1</superscript>. The results indicate that AARC-700 has bright prospect for application as an electrode material for energy storage. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09477047
- Volume :
- 28
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Ionics
- Publication Type :
- Academic Journal
- Accession number :
- 157133314
- Full Text :
- https://doi.org/10.1007/s11581-022-04551-1