| Autor: |
Jianqing Bian, Mengmeng Zheng, Qibin Chen, Honglai Liu |
| Předmět: |
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| Zdroj: |
New Journal of Chemistry; 5/21/2022, Vol. 46 Issue 19, p9372-9382, 11p |
| Abstrakt: |
Porous carbons with the large specific surface area, high electrical conductivity as well as abundant heteroatom doping are regarded as a promising candidate for supercapacitor applications. In this report, a facile potassium ferrate (K2FeO4) activation strategy is adopted to transform the N-rich Schiff-based polymer into N-doped graphitized porous carbons (NGPCs) by the synchronous activation and graphitization. The optimized NGPC-700-1 sample delivers a delightful capacitance of 322.7 F g-1 at 0.5 A g4 and an excellent rate capability (79.1% capacitance retained at 50 A g g-1) in 6 M KOH due to the unique laminated and porous structure with the large surface area (2123.7 m2 g g-1), high porous volume (1.30 cm3 g4) and abundant N/O dopant (6.20/8.20 at%). Moreover, the assembled symmetric supercapacitor achieves a high energy density of 21.5 W h kg4 at the power supply of 445.5 W kg g-1 in 1 M Na2SO4 electrolyte. Therefore, NGPCs derived from one-step activation/graphitization of N-rich polymer represent a promising route for preparing porous carbon materials with the high charge storage capacity and rate capability in the energy storage. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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