Flexible, Heat-Resistant, and Flame-Retardant Glass Fiber Nonwoven/Glass Platelet Composite Separator for Lithium-Ion Batteries

Ulrich Schadeck, Kanat Kyrgyzbaev, Heiko Zettl, Thorsten Gerdes and Ralf Moos
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Ulrich Schadeck: Department of Materials Processing, University of Bayreuth, 95440 Bayreuth, Germany
Kanat Kyrgyzbaev: Department of Materials Processing, University of Bayreuth, 95440 Bayreuth, Germany
Heiko Zettl: Vitrulan Textile Glass GmbH, 95509 Marktschorgast, Germany
Thorsten Gerdes: Department of Materials Processing, University of Bayreuth, 95440 Bayreuth, Germany
Ralf Moos: Department of Functional Materials, Zentrum für Energietechnik (ZET), University of Bayreuth, 95440 Bayreuth, Germany

Energies, 2018, vol. 11, issue 4, 1-14

Abstract: A new type of high-temperature stable and self-supporting composite separator for lithium-ion batteries was developed consisting of custom-made ultrathin micrometer-sized glass platelets embedded in a glass fiber nonwoven together with a water-based sodium alginate binder. The physical and electrochemical properties were investigated and compared to commercial polymer-based separators. Full-cell configuration cycling tests at different current rates were performed using graphite and lithium iron phosphate as electrode materials. The glass separator was high-temperature tested and showed a stability up to at least 600 °C without significant shrinking. Furthermore, it showed an exceptional wettability for non-aqueous electrolytes. The electrochemical performance was excellent compared to commercially available polymer-based separators. The results clearly show that glass platelets integrated into a glass fiber nonwoven performs remarkably well as a separator material in lithium-ion batteries and show high-temperature stability.

Keywords: glass platelets; composite separator; high-temperature stability; full-cell configuration cycling tests; lithium-ion battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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