High performance sulphur-doped pitch-based carbon materials as anode materials for sodium-ion batteries
| Autor: | Wang Chunlei, Yong-qiang Guo, Hong-yi Guo, Lei He, Yu-ren Sun, Ying Zhou, Chen Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Carbonization Materials Science (miscellaneous) chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure Electrochemistry 01 natural sciences Sulfur 0104 chemical sciences Anode chemistry Chemical engineering Specific surface area medicine General Materials Science Coal tar 0210 nano-technology Carbon medicine.drug |
| Zdroj: | New Carbon Materials. 35:420-427 |
| ISSN: | 1872-5805 |
| Popis: | Sulfur-doped pitch-based carbon materials with a high sulfur content were prepared by a two-step heat treatment method using medium-temperature coal tar pitch as the carbon source and sublimated sulfur as the sulfur source. The effect of the final carbonization temperature on the composition, microstructure and electrochemical properties of the materials suitability as anode materials for sodium ion batteries were investigated. Results show that by increasing the final carbonization temperature the sulfur content of the materials decreases significantly, and the specific surface area and interlayer spacing gradually increase. Among the carbons obtained at different final carbonization temperatures, the sulfur content of the carbon at 800 oC was 20.19 wt.% and its interlayer spacing 0.368 nm, and its reversible capacity was 482.8 mAh/g at 0.1 A/g for the first cycle and had values of 245.9 and 103.7 mAh/g at 0.5 and 5 A/g, respectively after 500 cycles. The excellent sodium storage performance of the carbon at 800 oC is attributed to its high sulfur content, large interlayer spacing and suitable pore structure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect