Volume 62, Issue 36 e202306528
Research Article

Polyoxometalate-Cyclodextrin-Based Cluster-Organic Supramolecular Framework for Polysulfide Conversion and Guest–Host Recognition in Lithium-sulfur Batteries

Prof. Lubin Ni

Corresponding Author

Prof. Lubin Ni

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P. R. China

Contribution: Conceptualization (lead), Data curation (lead), Funding acquisition (lead), Methodology (lead), Project administration (lead), Supervision (lead), Writing - original draft (lead), Writing - review & editing (lead)

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Jie Gu

Jie Gu

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P. R. China

Contribution: Data curation (lead), Formal analysis (lead), ​Investigation (lead)

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Xinyuan Jiang

Xinyuan Jiang

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P. R. China

Contribution: Data curation (equal), Formal analysis (equal), ​Investigation (equal), Resources (equal), Software (equal)

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Hongjie Xu

Hongjie Xu

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P. R. China

Contribution: Data curation (equal), ​Investigation (equal), Software (equal)

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Zhen Wu

Zhen Wu

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P. R. China

Contribution: Data curation (equal), ​Investigation (equal), Software (equal), Validation (equal), Visualization (equal)

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Yuchao Wu

Yuchao Wu

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P. R. China

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Yi Liu

Yi Liu

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P. R. China

Contribution: Validation (equal), Visualization (equal)

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Prof. Ju Xie

Prof. Ju Xie

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P. R. China

Contribution: Methodology (equal), Visualization (equal)

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Prof. Yongge Wei

Corresponding Author

Prof. Yongge Wei

Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China

Contribution: Conceptualization (equal), Project administration (equal), Resources (equal), Supervision (lead), Writing - original draft (equal), Writing - review & editing (lead)

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Prof. Guowang Diao

Corresponding Author

Prof. Guowang Diao

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P. R. China

Contribution: Resources (lead), Supervision (equal), Writing - review & editing (lead)

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First published: 18 July 2023
Citations: 27

Graphical Abstract

Polyoxometalate-cyclodextrin cluster-organic supramolecular framework (POM-CD-COSF)-based battery separator as an ideal lightweight barrier (ca. 0.3 mg cm−2) was first directly involved in the lithium-sulfur battery (Li−S) system to suppress the polysulfide shuttle effect through supramolecularly recognizing polysulfide guests and then catalyzing their conversion while simultaneously accelerating Li+ ions diffusion.

Abstract

Developing polyoxometalate-cyclodextrin cluster-organic supramolecular framework (POM-CD-COSF) still remains challenging due to an extremely difficult task in rationally interconnecting two dissimilar building blocks. Here we report an unprecedented POM-CD-COSF crystalline structure produced through the self-assembly process of a Krebs-type POM, [Zn2(WO2)2(SbW9O33)2]10−, and two β-CD units. The as-prepared POM-CD-COSF-based battery separator can be applied as a lightweight barrier (approximately 0.3 mg cm−2) to mitigate the polysulfide shuttle effect in lithium-sulfur batteries. The designed Li−S batteries equipped with the POM-CD-COSF modified separator exhibit remarkable electrochemical performance, attributed to fast Li+ diffusion through the supramolecular channel of β-CD, efficient polysulfide-capture ability by the dynamic host–guest interaction of β-CD, and improved sulfur redox kinetics by the bidirectional catalysis of POM cluster. This research provides a broad perspective for the development of multifunctional supramolecular POM frameworks and their applications in Li−S batteries.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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