Aramid Fibers Modulated Polyethylene Separator as Efficient Polysulfide Barrier for High-Performance Lithium-Sulfur Batteries
The separators with high absorbability of polysulfides are essential for improving the electrochemical performance of lithium–sulfur (Li–S) batteries. Herein, the aramid fibers coated polyethylene (AF-PE) films are designed by roller coating, the high polarity of AFs can strongly increase the bindin...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/15/2513 |
| _version_ | 1797441212466069504 |
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| author | Jifeng Gu Jiaping Zhang Yun Su Xu Yu |
| author_facet | Jifeng Gu Jiaping Zhang Yun Su Xu Yu |
| author_sort | Jifeng Gu |
| collection | DOAJ |
| description | The separators with high absorbability of polysulfides are essential for improving the electrochemical performance of lithium–sulfur (Li–S) batteries. Herein, the aramid fibers coated polyethylene (AF-PE) films are designed by roller coating, the high polarity of AFs can strongly increase the binding force at AF/PE interfaces to guarantee the good stability of the hybrid film. As confirmed by the microscopic analysis, the AF-PE-6 film with the nanoporous structure exhibits the highest air permeability by the optimal coating content of AFs. The high absorbability of polysulfides for AF-PE-6 film can effectively hinder the migration of polysulfides and alleviate the shuttle effect of the Li–S battery. AF-PE-6 cell shows the specific capacity of 661 mAh g<sup>−1</sup> at 0.1 C. After 200 charge/discharge cycles, the reversible specific capacity is 542 mAh g<sup>−1</sup> with the capacitance retention of 82%, implying the excellent stability of AF-PE-6. The enhanced cell performance is attributed to the porous architecture of the aramid layer for trapping the dissolved sulfur-containing species and facilitating the charge transfer, as confirmed by SEM and EDS after 200 cycles. This work provides a facile way to construct the aramid fiber-coated separator for the inhibition of polysulfides in the Li–S battery. |
| first_indexed | 2024-03-09T12:19:47Z |
| format | Article |
| id | doaj.art-5c1798bcedaa4aa2895eb49610df545b |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T12:19:47Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-5c1798bcedaa4aa2895eb49610df545b2023-11-30T22:41:48ZengMDPI AGNanomaterials2079-49912022-07-011215251310.3390/nano12152513Aramid Fibers Modulated Polyethylene Separator as Efficient Polysulfide Barrier for High-Performance Lithium-Sulfur BatteriesJifeng Gu0Jiaping Zhang1Yun Su2Xu Yu3College of Physics and Electronic Engineering, Xinxiang University, Xinxiang 453003, ChinaCollege of Physics and Electronic Engineering, Xinxiang University, Xinxiang 453003, ChinaCollege of Physics and Electronic Engineering, Xinxiang University, Xinxiang 453003, ChinaSchool of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 250002, ChinaThe separators with high absorbability of polysulfides are essential for improving the electrochemical performance of lithium–sulfur (Li–S) batteries. Herein, the aramid fibers coated polyethylene (AF-PE) films are designed by roller coating, the high polarity of AFs can strongly increase the binding force at AF/PE interfaces to guarantee the good stability of the hybrid film. As confirmed by the microscopic analysis, the AF-PE-6 film with the nanoporous structure exhibits the highest air permeability by the optimal coating content of AFs. The high absorbability of polysulfides for AF-PE-6 film can effectively hinder the migration of polysulfides and alleviate the shuttle effect of the Li–S battery. AF-PE-6 cell shows the specific capacity of 661 mAh g<sup>−1</sup> at 0.1 C. After 200 charge/discharge cycles, the reversible specific capacity is 542 mAh g<sup>−1</sup> with the capacitance retention of 82%, implying the excellent stability of AF-PE-6. The enhanced cell performance is attributed to the porous architecture of the aramid layer for trapping the dissolved sulfur-containing species and facilitating the charge transfer, as confirmed by SEM and EDS after 200 cycles. This work provides a facile way to construct the aramid fiber-coated separator for the inhibition of polysulfides in the Li–S battery.https://www.mdpi.com/2079-4991/12/15/2513nanoporousaramid fiberspolysulfidesLi–S battery |
| spellingShingle | Jifeng Gu Jiaping Zhang Yun Su Xu Yu Aramid Fibers Modulated Polyethylene Separator as Efficient Polysulfide Barrier for High-Performance Lithium-Sulfur Batteries Nanomaterials nanoporous aramid fibers polysulfides Li–S battery |
| title | Aramid Fibers Modulated Polyethylene Separator as Efficient Polysulfide Barrier for High-Performance Lithium-Sulfur Batteries |
| title_full | Aramid Fibers Modulated Polyethylene Separator as Efficient Polysulfide Barrier for High-Performance Lithium-Sulfur Batteries |
| title_fullStr | Aramid Fibers Modulated Polyethylene Separator as Efficient Polysulfide Barrier for High-Performance Lithium-Sulfur Batteries |
| title_full_unstemmed | Aramid Fibers Modulated Polyethylene Separator as Efficient Polysulfide Barrier for High-Performance Lithium-Sulfur Batteries |
| title_short | Aramid Fibers Modulated Polyethylene Separator as Efficient Polysulfide Barrier for High-Performance Lithium-Sulfur Batteries |
| title_sort | aramid fibers modulated polyethylene separator as efficient polysulfide barrier for high performance lithium sulfur batteries |
| topic | nanoporous aramid fibers polysulfides Li–S battery |
| url | https://www.mdpi.com/2079-4991/12/15/2513 |
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