Electrospun MoS2-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS2 Batteries

Wu, Sheng; Liu, Qian; Zhang, Wei; Wu, Ruizhe; Tang, Hongping; Ma, Yulin; Xu, Wenqiang; Jiang, Shufang

doi:10.3390/polym16070921

Open AccessArticle

Electrospun MoS₂-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS₂ Batteries

by

Sheng Wu

,

Qian Liu

,

Wei Zhang

,

Ruizhe Wu

^*

,

Hongping Tang

,

Yulin Ma

,

Wenqiang Xu

and

Shufang Jiang

^*

Collaborative 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, China

^*

Authors to whom correspondence should be addressed.

Polymers 2024, 16(7), 921; https://doi.org/10.3390/polym16070921

Submission received: 8 March 2024 / Revised: 21 March 2024 / Accepted: 26 March 2024 / Published: 27 March 2024

(This article belongs to the Section Polymer Membranes and Films)

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Abstract

As a promising candidate for high-energy-density rechargeable lithium metal batteries, Li/FeS₂ 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 FeS₂ 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 FeS₂ can be greatly enhanced with the application of a double-layer MoS₂-CNTs-PVA (MCP)/PVA separator fabricated by electrospinning. The assembled Li/FeS₂ 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 MoS₂/CNTs provides catalytic sites for LiPS conversion.

Keywords: electrospinning; polyvinyl alcohol; MoS₂; Li/FeS₂ batteries

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MDPI and ACS Style

Wu, S.; Liu, Q.; Zhang, W.; Wu, R.; Tang, H.; Ma, Y.; Xu, W.; Jiang, S. Electrospun MoS₂-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS₂ Batteries. Polymers 2024, 16, 921. https://doi.org/10.3390/polym16070921

AMA Style

Wu S, Liu Q, Zhang W, Wu R, Tang H, Ma Y, Xu W, Jiang S. Electrospun MoS₂-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS₂ Batteries. Polymers. 2024; 16(7):921. https://doi.org/10.3390/polym16070921

Chicago/Turabian Style

Wu, Sheng, Qian Liu, Wei Zhang, Ruizhe Wu, Hongping Tang, Yulin Ma, Wenqiang Xu, and Shufang Jiang. 2024. "Electrospun MoS₂-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS₂ Batteries" Polymers 16, no. 7: 921. https://doi.org/10.3390/polym16070921

APA Style

Wu, S., Liu, Q., Zhang, W., Wu, R., Tang, H., Ma, Y., Xu, W., & Jiang, S. (2024). Electrospun MoS₂-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS₂ Batteries. Polymers, 16(7), 921. https://doi.org/10.3390/polym16070921

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Electrospun MoS₂-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS₂ Batteries

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