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Sodium Borosilicate Glass Separators as an Electrolyte Additive Donor for Improving the Electrochemical Performance of Lithium-Ion Batteries

Title data

Schadeck, Ulrich ; Hahn, Markus ; Gerdes, Thorsten ; Krenkel, Walter ; Danzer, Michael A. ; Moos, Ralf:
Sodium Borosilicate Glass Separators as an Electrolyte Additive Donor for Improving the Electrochemical Performance of Lithium-Ion Batteries.
In: Journal of the Electrochemical Society. Vol. 166 (2019) Issue 14 . - A3416-A3424.
ISSN 1945-7111
DOI: https://doi.org/10.1149/2.1011914jes

Abstract in another language

In order to replace today's used electrochemical passive polymer-based lithium-ion battery separators, custom-made ultrathin micrometer-sized glass platelets are being tested as separators. Ions are leached from the glass by hydrofluoric acid (HF), which is typically present in LiPF6 containing electrolytes. The ions act as an electrolyte additive and show an effect on electrochemical cell parameters with progressing battery cycling. For comparability, different glass compositions are investigated and are compared to a commercial polymer-based separator. The separators are tested in a graphite || lithium iron phosphate full-cell configuration. Charge/discharge tests at different C-rates up to 10C, post-mortem analyses, impedance spectroscopy measurements, and distribution of relaxation times analyses are conducted to analyze the specific influence of the glass composition on cell aging. It is shown that in addition to the positive side effect of HF gettering, the ions from a sodium borosilicate glass cause a modification of the solid electrolyte interphase (SEI) with regard to its conductivity, thus improving the fast-charging capability and cycling stability of the battery cell.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Ceramic Materials Engineering > Chair Ceramic Materials Engineering - Univ.-Prof. Dr.-Ing. Walter Krenkel
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Faculties > Faculty of Engineering Science > Lehrstuhl Elektrische Energiesysteme > Lehrstuhl Elektrische Energiesysteme - Univ.-Prof. Dr. Michael A. Danzer
Profile Fields > Advanced Fields > Advanced Materials
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Research Institutions > Affiliated Institutes > TechnologieAllianzOberfranken (TAO)
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 18 Oct 2019 06:22
Last Modified: 18 Oct 2019 06:22
URI: https://eref.uni-bayreuth.de/id/eprint/52789