Phosphorus/sulfur Co-doped porous carbon with enhanced specific capacitance for supercapacitor and improved catalytic activity for oxygen reduction reaction
| Autor: | Jiacheng Wang, Stephanie L. Candelaria, Pengxi Li, Ruguang Ma, Guozhong Cao, Evan Uchaker, Qian Liu, Yao Zhou, Yongfang Chen |
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| Rok vydání: | 2016 |
| Předmět: |
Supercapacitor
Carbon disulfide Renewable Energy Sustainability and the Environment Chemistry Inorganic chemistry technology industry and agriculture Energy Engineering and Power Technology chemistry.chemical_element Phosphorus pentasulfide 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Sulfur 0104 chemical sciences Catalysis chemistry.chemical_compound Amorphous carbon Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Pyrolysis |
| Zdroj: | Journal of Power Sources. 314:39-48 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2016.03.009 |
| Popis: | Phosphorus (P)/sulfur (S) co-doped porous carbon derived from resorcinol and furaldehyde are synthesized through one-step sol-gel processing with the addition of phosphorus pentasulfide as P and S source followed with freeze-drying and pyrolysis in nitrogen. The P/S co-doping strategy facilitates the pore size widening both in micropore and mesopore regions, together with the positive effect on the degree of graphitization of porous carbon through elimination of amorphous carbon through the formation and evaporation of carbon disulfide. As an electrode for supercapacitor application, P/S co-doped porous carbon demonstrates 43.5% improvement on specific capacitance of the single electrode compared to pristine porous carbon in organic electrolyte at a current of 0.5 mA due to the P-induced pseudocapacitive reactions. As for electrocatalytic use, promoted electrocatalytic activity and high resistance to crossover effects of oxygen reduction reaction (ORR) in alkaline media are observed after the introduction of P and S into porous carbon. After air activation, the specific capacitance of the single electrode of sample PS-pC reaches up to 103.5 F g−1 and an improved oxygen reduction current density. |
| Databáze: | OpenAIRE |
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