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Schadeck, Ulrich ; Gerdes, Thorsten ; Krenkel, Walter ; Moos, Ralf:
A Glass Platelet Coating on Battery Electrodes and Its Use as a Separator for Lithium-Ion Batteries.
In: Journal of Electrochemical Energy Conversion and Storage.
Bd. 17
(2020)
Heft 3
.
- 034502.
ISSN 2381-6910
DOI: https://doi.org/10.1115/1.4045783
Abstract
A new type of separator for lithium-ion batteries (LIBs) has been developed using ultrathin micrometer-sized sodium borosilicate glass platelets coated directly on a battery electrode with a water-based binder. The coating process is described in detail, demonstrating coating thicknesses of the glass separator of less than 50 µm. The high-temperature stability has been investigated and it has been shown that the separator is dimensionally stable to at least 600 °C. With regard to the electrochemical performance, full-cell tests on graphite || lithium iron phosphate cells showed a very good behavior, according to which comparable properties of the electrode/separator compound to a commercial polymer-based separator were achieved. This glass separator/electrode composite shows an interesting property profile and is a temperature-stable alternative to conventional polymer-based separators.