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Graphene/Carbon Nanotubes Composite as a Polysulfide Trap for Lithium-Sulfur Batteries
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gao, Feng |
| Copyright Year | 2019 |
| Abstract | Separator modified with graphene/carbon nanotube composite (G/CNT) is introduced into lithium-sulfur (Li-S) battery to trap and activate the soluble polysulfides. The Li-S battery based on a novel separator allows sulfur cathode to reach a high initial discharge capacity of 1200 mAh.g at 0.2 C and a reversible capacity of 815 mAh.g after 100 cycles at 0.5 C, which led to an excellent rate capability (up to 2 C rate) and a high Coulombic efficiency of 99%. In this study, the role of separator modified with G/CNT in the electrochemistry of Li-S batteries was also systematically explored. The electrical conductivity and the special leaf stack structure of G/CNT layer have a synergistic effect in controlling the shuttle effect of polysulfides. Moreover, the G/CNT layer can compensate for the effects of deterioration of the morphology of sulfur cathode. |
| Starting Page | 3301 |
| Ending Page | 3314 |
| Page Count | 14 |
| File Format | PDF HTM / HTML |
| DOI | 10.20964/2019.04.16 |
| Alternate Webpage(s) | http://www.electrochemsci.org/papers/vol14/140403301.pdf |
| Alternate Webpage(s) | https://doi.org/10.20964/2019.04.16 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
