| Autor: |
Xiaofei Hu, Youxuan Ni, Chuanlong Wang, Huan Wang, Edward Matios, Jun Chen, Weiyang Li |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Cell Reports Physical Science, Vol 1, Iss 2, Pp 100015- (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2666-3864 |
| DOI: |
10.1016/j.xcrp.2020.100015 |
| Popis: |
Summary: Room temperature sodium-sulfur (Na-S) batteries hold great promise as the next-generation cost-effective energy storage systems. However, their practical implementation is still plagued by the low reversible capacity of a bulk-sized commercial sulfur cathode with low Coulombic efficiency and poor cycling stability. Here, we report a highly stable room temperature Na-S battery using a facile-processed, nanocarbon-promoted, bulk-sized commercial sulfur cathode and a polymer electrolyte. This processed nanocarbon possesses a high binding affinity to sulfur and polysulfides, largely facilitating the sulfur reaction kinetics and leading to high reversible capacity. Meanwhile, by applying a thin coating of the facile-processed nanocarbon on the polymer electrolyte, dead sulfur formation can be avoided, contributing to greatly enhanced capacity retention. Our Na-S battery delivers a reversible capacity of >700 mAh g−1 with near-100% Coulombic efficiency and the ultrahigh capacity retention of 98.2% at 0.2C after 200 cycles. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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