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Energies 2018, 11(4), 999; https://doi.org/10.3390/en11040999

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.
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)
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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. 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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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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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