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Electrochemically active glass separators for lithium-ion batteries

Title data

Schadeck, Ulrich ; Gerdes, Thorsten ; Krenkel, Walter ; Moos, Ralf:
Electrochemically active glass separators for lithium-ion batteries.
Event: Advanced Functional Materials Spectroscopy and Electrochemistry Congress , March 24-27, 2019 , Stockholm, Sweden.
(Conference item: Conference , Speech )

Abstract in another language

Lithium-ion batteries are an integral part of today's society. They are used in almost any mobile electrical device, since they have higher energy densities and a more efficient cyclic stability than other battery types such as lead-acid or nickelcadmium batteries. Therefore, Lithium-ion batteries have become the standard choice of power sources for electric vehicles. This results in enhanced safety requirements. To replace todays used electrochemically passive polymer-based battery separators with poor stability to high temperatures, a novel high-temperature stable and self-supporting composite separator for lithium-ion batteries is developed consisting of custom-made ultrathin micrometer-sized sodium borosilicate glass platelets embedded in a glass fiber nonwoven together with a water-based binder. The presented separator is electrochemically active, whereas ions from the glass platelets are provided during progressing cycling, behave like an electrolyte additive, and improve the battery performance. For comparison, glass platelets with alternative compositions are investigated. The glass separators are tested in a graphite/lithium iron phosphate full-cell configuration. Charge/discharge tests at different current rates up to a 10C-rate, post-mortem analysis, impedance measurements and electric analysis methods are used to interpret the specific influence of glass on cell aging.

Further data

Item Type: Conference item (Speech)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Ceramic Materials Engineering
Faculties > Faculty of Engineering Science > Chair Materials Processing
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 08 May 2019 06:36
Last Modified: 08 May 2019 06:36
URI: https://eref.uni-bayreuth.de/id/eprint/48909