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Volume 12
Issue 4
10.3390/polym12040764
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Article

Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries

by
Yanling Li
1,
Xiang Wang
1,*,
Jianyu Liang
2,*,
Kuan Wu
1,
Long Xu
1 and
Jun Wang
1
1
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
2
Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609, USA
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(4), 764; https://doi.org/10.3390/polym12040764
Submission received: 14 January 2020 / Revised: 4 March 2020 / Accepted: 10 March 2020 / Published: 1 April 2020
(This article belongs to the Special Issue Polymer Materials for Electrochemical Applications)
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Abstract

A zeolite/polyimide composite separator with a spongy-like structure was prepared by phase inversion methods based on heat-resistant polyimide (PI) polymer matrix and ZSM-5 zeolite filler, with the aim to improve the thermal stability and electrochemical properties of corresponding batteries. The separator exhibits enhanced thermal stability and no shrinkage up to 180 °C. The introduction of a certain number of ZSM-5 zeolites endows the composite separator with enhanced wettability and electrolyte uptake, better facilitating the free transport of lithium-ion. Furthermore, the composite separator shows a high ionic conductivity of 1.04 mS cm−1 at 25 °C, and a high decomposition potential of 4.7 V. Compared with the PP separator and pristine PI separator, the ZSM-5/PI composite separator based LiFePO4/Li cells have better rate capability (133 mAh g−1 at 2 C) and cycle performance (145 mAh g-1 at 0.5 C after 50 cycles). These results demonstrate that the ZSM-5/PI composite separator is promising for high-performance and high-safety lithium-ion batteries.
Keywords: zeolite; polyimide; phase inversion; spongy-like; lithium-ion batteries zeolite; polyimide; phase inversion; spongy-like; lithium-ion batteries

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MDPI and ACS Style

Li, Y.; Wang, X.; Liang, J.; Wu, K.; Xu, L.; Wang, J. Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries. Polymers 2020, 12, 764. https://doi.org/10.3390/polym12040764

AMA Style

Li Y, Wang X, Liang J, Wu K, Xu L, Wang J. Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries. Polymers. 2020; 12(4):764. https://doi.org/10.3390/polym12040764

Chicago/Turabian Style

Li, Yanling, Xiang Wang, Jianyu Liang, Kuan Wu, Long Xu, and Jun Wang. 2020. "Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries" Polymers 12, no. 4: 764. https://doi.org/10.3390/polym12040764

APA Style

Li, Y., Wang, X., Liang, J., Wu, K., Xu, L., & Wang, J. (2020). Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries. Polymers, 12(4), 764. https://doi.org/10.3390/polym12040764

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