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| N-Doped Porous Carbons with High Surface Areas Prepared Through One-Step Chemical Activation and Their Application for Supercapacitors |
| Author Name | Affiliation | E-mail | | XIN Ran-Ran | Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, China | | | MIAO Hang-Jin | Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, China | | | JIANG Wei | Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, China | | | HU Geng-Shen | Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, China | gshu@zjnu.edu.cn |
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| Abstract: N-doped carbons with high surface areas were prepared through one-step chemical activation by using polyurethane foam as carbon and nitrogen source and KOH as activation agent. The morphology, elemental content, surface area and the pore structure of the resulting carbon-based products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption, X-ray diffraction (XRD), Raman and X-ray photoelectron spectroscopy (XPS). The carbon-based product obtained at 700℃ (FC700) possesses the largest surface area and pore volume, contributing by the interaction between KOH and the polyurethane foam. In three-electrode system, the capacitance can reach up to 452 F·g-1 at a current density of 0.5 A·g-1 in 6.0 mol·L-1 KOH solution. In a symmetric supercapacitor, the capacitance can reach 344 F·g-1 and the energy density is 11.9 Wh·kg-1 at the power density of 247 W·kg-1. And the capacitance can maintain 98.03% of the initial capacitance, demonstrating the excellent stability. The excellent electrochemical performance of FC700 can be ascribed to the high surface area, large pore volume and nitrogen doping. |
| Keywords: polyurethane foam KOH activation carbon supercapacitor |
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| XIN Ran-Ran,MIAO Hang-Jin,JIANG Wei,HU Geng-Shen.N-Doped Porous Carbons with High Surface Areas Prepared Through One-Step Chemical Activation and Their Application for Supercapacitors[J].Chinese Journal of Inorganic Chemistry,2019,35(10):1781-1790. |
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