Electrospun MoS<sub>2</sub>-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS<sub>2</sub> Batteries
As a promising candidate for high-energy-density rechargeable lithium metal batteries, Li/FeS<sub>2</sub> batteries still suffer from the large volume change and severe shuttle effect of lithium polysulfides during cycling. To improve the electrochemical performance, great efforts have b...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/16/7/921 |
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| author | Sheng Wu Qian Liu Wei Zhang Ruizhe Wu Hongping Tang Yulin Ma Wenqiang Xu Shufang Jiang |
| author_facet | Sheng Wu Qian Liu Wei Zhang Ruizhe Wu Hongping Tang Yulin Ma Wenqiang Xu Shufang Jiang |
| author_sort | Sheng Wu |
| collection | DOAJ |
| description | As a promising candidate for high-energy-density rechargeable lithium metal batteries, Li/FeS<sub>2</sub> batteries still suffer from the large volume change and severe shuttle effect of lithium polysulfides during cycling. To improve the electrochemical performance, great efforts have been made to modify FeS<sub>2</sub> cathodes by constructing various nanocomposites. However, energy density is sacrificed, and these materials are not applicable at a large scale. Herein, we report that the electrochemical performance of commercial FeS<sub>2</sub> can be greatly enhanced with the application of a double-layer MoS<sub>2</sub>-CNTs-PVA (MCP)/PVA separator fabricated by electrospinning. The assembled Li/FeS<sub>2</sub> batteries can still deliver a high discharge capacity of 400 mAh/g after 200 cycles at a current density of 0.5 C. The improved cycling stability can be attributed to the strong affinity towards lithium polysulfides (LiPSs) of the hydroxyl-rich PVA matrix and the unique double-layer structure, in which the bottom layer acts as an electrical insulation layer and the top layer coupled with MoS<sub>2</sub>/CNTs provides catalytic sites for LiPS conversion. |
| first_indexed | 2024-04-24T10:37:17Z |
| format | Article |
| id | doaj.art-e5e31ca706ff4ae68ccfecf01fe90ed5 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-04-24T10:37:17Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-e5e31ca706ff4ae68ccfecf01fe90ed52024-04-12T13:25:06ZengMDPI AGPolymers2073-43602024-03-0116792110.3390/polym16070921Electrospun MoS<sub>2</sub>-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS<sub>2</sub> BatteriesSheng Wu0Qian Liu1Wei Zhang2Ruizhe Wu3Hongping Tang4Yulin Ma5Wenqiang Xu6Shufang Jiang7Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, ChinaCollaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, ChinaCollaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, ChinaCollaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, ChinaCollaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, ChinaCollaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, ChinaCollaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, ChinaCollaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, ChinaAs a promising candidate for high-energy-density rechargeable lithium metal batteries, Li/FeS<sub>2</sub> batteries still suffer from the large volume change and severe shuttle effect of lithium polysulfides during cycling. To improve the electrochemical performance, great efforts have been made to modify FeS<sub>2</sub> cathodes by constructing various nanocomposites. However, energy density is sacrificed, and these materials are not applicable at a large scale. Herein, we report that the electrochemical performance of commercial FeS<sub>2</sub> can be greatly enhanced with the application of a double-layer MoS<sub>2</sub>-CNTs-PVA (MCP)/PVA separator fabricated by electrospinning. The assembled Li/FeS<sub>2</sub> batteries can still deliver a high discharge capacity of 400 mAh/g after 200 cycles at a current density of 0.5 C. The improved cycling stability can be attributed to the strong affinity towards lithium polysulfides (LiPSs) of the hydroxyl-rich PVA matrix and the unique double-layer structure, in which the bottom layer acts as an electrical insulation layer and the top layer coupled with MoS<sub>2</sub>/CNTs provides catalytic sites for LiPS conversion.https://www.mdpi.com/2073-4360/16/7/921electrospinningpolyvinyl alcoholMoS<sub>2</sub>Li/FeS<sub>2</sub> batteries |
| spellingShingle | Sheng Wu Qian Liu Wei Zhang Ruizhe Wu Hongping Tang Yulin Ma Wenqiang Xu Shufang Jiang Electrospun MoS<sub>2</sub>-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS<sub>2</sub> Batteries Polymers electrospinning polyvinyl alcohol MoS<sub>2</sub> Li/FeS<sub>2</sub> batteries |
| title | Electrospun MoS<sub>2</sub>-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS<sub>2</sub> Batteries |
| title_full | Electrospun MoS<sub>2</sub>-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS<sub>2</sub> Batteries |
| title_fullStr | Electrospun MoS<sub>2</sub>-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS<sub>2</sub> Batteries |
| title_full_unstemmed | Electrospun MoS<sub>2</sub>-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS<sub>2</sub> Batteries |
| title_short | Electrospun MoS<sub>2</sub>-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS<sub>2</sub> Batteries |
| title_sort | electrospun mos sub 2 sub cnts pva pva hybrid separator for high performance li fes sub 2 sub batteries |
| topic | electrospinning polyvinyl alcohol MoS<sub>2</sub> Li/FeS<sub>2</sub> batteries |
| url | https://www.mdpi.com/2073-4360/16/7/921 |
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