High-Efficiency Polysulfide Trapping with g-C 3 N 4 /CNT Hybrids for Superior Lithium-Sulfur Batteries.
Saved in:
| Title: | High-Efficiency Polysulfide Trapping with g-C 3 N 4 /CNT Hybrids for Superior Lithium-Sulfur Batteries. |
|---|---|
| Authors: | Chen, Zhen1 (AUTHOR), Meng, Hao1,2 (AUTHOR), Wang, Jiayi1 (AUTHOR), Yang, Lin1,2 (AUTHOR), Wang, Xin1 (AUTHOR), Chen, Zhongwei2 (AUTHOR) |
| Source: | Energies (19961073). Sep2025, Vol. 18 Issue 17, p4462. 14p. |
| Subjects: | Lithium sulfur batteries, Polysulfides, Electric conductivity, Carbon nanotubes, Adsorption (Chemistry) |
| Abstract: | Commercialization of lithium-sulfur (Li-S) batteries is critically hampered by the severe lithium polysulfide shuttle effect. Hence, designing multifunctional materials that synergistically provide physical confinement of polysulfides, chemical entrapment, and catalytic promotion is a viable route for improving Li-S battery performance. Herein, graphitic carbon nitride (g-C3N4) with abundant nitrogen atoms was used as the chemical adsorption material to realize a "physical-chemical" dual confinement for polysulfides. Furthermore, the integration of CNTs with g-C3N4 is intended to substantially enhance the conductivity of the cathode material. Consequently, the synthesized g-C3N4/CNT composite, which functions as an effective polysulfide immobilizer, significantly improved the cycling stability and discharge capacity of Li-S batteries. This enhancement can be attributed to its potent adsorption and catalytic activities. Li-S cells utilizing g-C3N4/CNT cathodes exhibit exceptional discharge capacity and notable rate capability. Specifically, after 100 cycles at 0.2 C, the discharge capacity was 701 mAh g−1. Furthermore, even at a high rate of 2 C, a substantial capacity of 457 mAh g−1 was retained. [ABSTRACT FROM AUTHOR] |
| Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | Commercialization of lithium-sulfur (Li-S) batteries is critically hampered by the severe lithium polysulfide shuttle effect. Hence, designing multifunctional materials that synergistically provide physical confinement of polysulfides, chemical entrapment, and catalytic promotion is a viable route for improving Li-S battery performance. Herein, graphitic carbon nitride (g-C3N4) with abundant nitrogen atoms was used as the chemical adsorption material to realize a "physical-chemical" dual confinement for polysulfides. Furthermore, the integration of CNTs with g-C3N4 is intended to substantially enhance the conductivity of the cathode material. Consequently, the synthesized g-C3N4/CNT composite, which functions as an effective polysulfide immobilizer, significantly improved the cycling stability and discharge capacity of Li-S batteries. This enhancement can be attributed to its potent adsorption and catalytic activities. Li-S cells utilizing g-C3N4/CNT cathodes exhibit exceptional discharge capacity and notable rate capability. Specifically, after 100 cycles at 0.2 C, the discharge capacity was 701 mAh g−1. Furthermore, even at a high rate of 2 C, a substantial capacity of 457 mAh g−1 was retained. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 19961073 |
| DOI: | 10.3390/en18174462 |
