Volume 142, Issue 17 e56780
RESEARCH ARTICLE

Enhancement of Solid-State Lithium-Ion Batteries Using Zeolitic Imidazolate Framework-67 in Polyethylene Oxide-Based Composite Polymer Electrolytes for Improved Ionic Conductivity and Stability

Xiying Wang

Xiying Wang

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China

Contribution: Conceptualization (equal), Data curation (lead), Writing - original draft (lead)

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Beili Pang

Corresponding Author

Beili Pang

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China

Correspondence:

Beili Pang ([email protected])

Liyan Yu ([email protected])

Lifeng Dong ([email protected])

Contribution: Conceptualization (lead), Funding acquisition (lead), Writing - review & editing (lead)

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Lingyi Kong

Lingyi Kong

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China

Contribution: Data curation (equal), Formal analysis (equal)

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Yongqi Zhu

Yongqi Zhu

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China

Contribution: Data curation (equal), Formal analysis (equal)

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Changzhao Chen

Changzhao Chen

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China

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

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Hongzhou Dong

Hongzhou Dong

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China

Contribution: ​Investigation (lead), Project administration (lead)

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Liyan Yu

Corresponding Author

Liyan Yu

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China

Correspondence:

Beili Pang ([email protected])

Liyan Yu ([email protected])

Lifeng Dong ([email protected])

Contribution: Funding acquisition (lead), Project administration (lead)

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Lifeng Dong

Corresponding Author

Lifeng Dong

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China

Department of Physics, Hamline University, St. Paul, Minnesota, USA

Correspondence:

Beili Pang ([email protected])

Liyan Yu ([email protected])

Lifeng Dong ([email protected])

Contribution: Conceptualization (lead), Project administration (lead), Writing - review & editing (lead)

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First published: 27 January 2025

Funding: This work was supported by the National Natural Science Foundation of China (21905153, 22378221, 22308183, 52002198, 21776147, 61604086, ZR2023QB070), the Natural Science Foundation of Shandong Province (ZR2021YQ32), the Taishan Scholar Project of Shandong Province (tsqn201909117), the Qingdao Science and Technology Benefit the People Demonstration and Guidance Special Project (23-2-8-cspz-11-nsh), the Qingdao Natural Science Foundation (23-2-1-241-zyyd-jch), and the China Postdoctoral Science Foundation (2023M731856). Lifeng Dong also thanks financial support from the Malmstrom Endowed Fund at Hamline University.

ABSTRACT

Polyethylene oxide (PEO)-based polymers are commonly used in solid-state lithium-ion batteries, though their high crystallinity at room temperature reduces ionic conductivity. In this research, zeolitic imidazolate framework-67 (ZIF-67), with its regular dodecahedral structure, large surface area, and numerous nanoscopic pores, is synthesized and uniformly dispersed into a PEO matrix to create a novel composite polymer electrolyte (CPE). ZIF-67 effectively reduces PEO crystallinity and enhances the mechanical properties of the electrolyte by disrupting the order structure of the PEO polymer chains. The resulting CPE achieves an ion conductivity of 6.50 × 10−4 S cm−1, and demonstrated high interfacial compatibility and stability with optimized ZIF-67 content. Furthermore, the LiCoO2/CPE/Li battery exhibits good cycle stability at 0.1 C, with discharge capacities of 130.81, 125.31, and 112.25 mAh/g at 0.1, 0.2, and 0.5 C. Therefore, ZIF-67 presents a promising strategy for enhancing battery performance and developing high-performance lithium-ion batteries.

Conflicts of Interest

The authors declare no conflicts of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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