Volume 136, Issue 32 47841
Article

Preparation of 4A zeolite coated polypropylene membrane for lithium-ion batteries separator

Ehsan Shekarian

Ehsan Shekarian

Department of Petroleum and Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

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Mohammad Reza Jafari Nasr

Mohammad Reza Jafari Nasr

Department of Petroleum and Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

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Toraj Mohammadi

Corresponding Author

Toraj Mohammadi

Research Center for Membrane Separation Processes, Faculty of Chemical Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran

Correspondence to: T. Mohammadi ([email protected])Search for more papers by this author
Omid Bakhtiari

Omid Bakhtiari

Membrane Research Center, Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran

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Mehran Javanbakht

Mehran Javanbakht

Department of Chemistry, Amirkabir University of Technology, Tehran, Iran

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First published: 10 April 2019
Citations: 37

ABSTRACT

This study aims to improve wettability and thermal resistance of lithium-ion batteries separators. For this purpose, a commercial polypropylene (PP) separator was coated by 4A zeolite using poly(vinylidene fluoride) as binder and effects of the separators' zeolite content was investigated. All the coated separators showed lower contact angles, higher electrolyte uptakes, and less thermal shrinkages compared to the neat commercial separator. The coated PPA8 separator (zeolite to binder ratio of 8) showed the lowest wettability (contact angle of 0°) and electrolyte uptake (270%) due to its surface porosity resulting from the zeolite particles interstitial cavities as well as their internal cavities. Also, the PPA8 separator ion conductivity was found as 2.25 mS cm−1 and C-rate and cycling performance of its assembled battery were higher compared to those of the commercial PP separator assembled battery. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47841.

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