Good Low-Temperature Properties of Nitrogen-Enriched Porous Carbon as Sulfur Hosts for High-Performance Li-S Batteries
| 发表年度： |
2016 |
| 期： |
27 |
| 卷： |
8 |
| 页： |
17253-17259 |
| 摘要： |
Despite the increased attention devoted to exploring cathode construction based on various nitrogen enriched carbon scaffolds at room temperature, the low temperature behaviors of Li-S cathodes have yet to be studied. Herein, we demonstrate the good low-temperature electrochemical performances of nitrogen-enriched carbon/sulfur composite cathodes. Electrochemical evaluation indicates that a reversible capacity of 368 mAh g(-1) (0.5 C) over 100 cycles is achieved at -20 degrees C. After returning to 25 degrees C, a capacity of 620 mAh g(-1) (0.5 C) is achieved over 350 cycles with a low-capacity attenuation rate (0.071% per cycle) and an initial capacity of 1151 mAh g(-1) (0.1C). This positive electrochemical property was speculated to result from the good surface chemistry of the various amine groups in the nitrogen-enriched carbon materials with enhanced polysulfide immobilization. |
| 刊物名称： |
ACS APPLIED MATERIALS & INTERFACES |
| 影响因子： |
8.456 |
