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Synergy of Inorganic Fillers in Composite Thermoplastic Polymer/Ionic Liquid/LiTFSI Electrolytes

AuthorsGonzález, F.; Garcia-Calvo, O.; Tiemblo, Pilar; García, Nuria ; Fedeli, E.; Thieu, T.; Urdampilleta, I.; Kvasha, A.
Issue Date2020
PublisherElectrochemical Society
CitationJournal of the Electrochemical Society 167 (2020)
AbstractThe development of novel solid electrolytes, which can be processed using solvent-free methods, is one of the keys for successful industrialization of solid state batteries and their further implementation in electrical vehicles. Here, we study thermoplastic solid state electrolytes based on polyethylene oxide (PEO), 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYRTFSI), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and two inorganic fillers with different morphology and nature (modified sepiolite (TPGS-S) and garnet-type LiLaZrNbO (LLZNO) prepared by solvent free extrusion method. Several thermoplastic polymer electrolytes (TPEs) are prepared and comprehensively studied. Composite thermoplastic electrolyte TPE-S10G10 containing 10 wt% of TPGS-S and 10 wt% of LLZNO fillers shows the best electrochemical performance in Li-LiFePO solid state batteries operating under 0.2C/0.5D cycling conditions at 60 &Deg;C. Solid state cell with TPE-S10G10 electrolyte retains 80% of initial discharge capacity after 540 cycles. Thus, a synergetic effect of using two different fillers, which can be exploited during the development of TPEs, is clearly demonstrated.
Publisher version (URL)http://dx.doi.org/10.1149/1945-7111/ab6bc1
Identifiersdoi: 10.1149/1945-7111/ab6bc1
issn: 1945-7111
Appears in Collections:(ICTP) Artículos
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