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Open AccessArticle

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

1
Department of Materials Processing, University of Bayreuth, 95440 Bayreuth, Germany
2
Vitrulan Textile Glass GmbH, 95509 Marktschorgast, Germany
3
Department of Functional Materials, Zentrum für Energietechnik (ZET), University of Bayreuth, 95440 Bayreuth, Germany
*
Author to whom correspondence should be addressed.
Energies 2018, 11(4), 999; https://doi.org/10.3390/en11040999
Received: 26 March 2018 / Revised: 11 April 2018 / Accepted: 13 April 2018 / Published: 20 April 2018
(This article belongs to the Section Energy Storage and Application)
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. View Full-Text
Keywords: glass platelets; composite separator; high-temperature stability; full-cell configuration cycling tests; lithium-ion battery glass platelets; composite separator; high-temperature stability; full-cell configuration cycling tests; lithium-ion battery
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Schadeck, U.; Kyrgyzbaev, K.; Zettl, H.; Gerdes, T.; Moos, R. Flexible, Heat-Resistant, and Flame-Retardant Glass Fiber Nonwoven/Glass Platelet Composite Separator for Lithium-Ion Batteries. Energies 2018, 11, 999.

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