Enhanced Na+ pseudocapacitance in a P, S co-doped carbon anode arising from the surface modification by sulfur and phosphorus with C–S–P coupling
| Autor: | Kangli Wang, Jie Yan, Kai Jiang, Wei Li, Pingyuan Feng, Mao Jiang, Jing Han, Ruxing Wang, Shengling Cao |
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| Rok vydání: | 2020 |
| Předmět: |
Carbon disulfide
Materials science Renewable Energy Sustainability and the Environment Phosphorus Doping Inorganic chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Sulfur Pseudocapacitance 0104 chemical sciences Anode chemistry.chemical_compound Adsorption chemistry General Materials Science 0210 nano-technology Carbon |
| Zdroj: | Journal of Materials Chemistry A. 8:422-432 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c9ta11594c |
| Popis: | Enhanced phosphorus (7.2 wt%) and sulfur (15.7 wt%) co-doped carbon (PSC) is synthesized via a one-step sintering of carbon disulfide and red phosphorus in a vacuum. It is found that S atoms can act as immobilization sites for phosphorus by covalently bonding with P atoms in the form of C–S–P, and thus high-level doping of phosphorus can be realized. Owing to the high-level doping, this co-doped carbon shows enlarged interlayer spacing, improved charge transfer capability and strong adsorption of Na+ ions. When tested as an anode for sodium ion batteries, this PSC delivers a high reversible capacity of 513.8 mA h g−1 at 100 mA g−1, excellent rate capability of 181.8 mA h g−1 at 10 A g−1 and superior cycling stability with a capacity of 290.1 mA h g−1 after 1000 cycles at 1 A g−1. |
| Databáze: | OpenAIRE |
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