ENGLISH |
中国科研实验室
| 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 |
