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Overcoming the Interfacial Limitations Imposed by the Solid–Solid Interface in Solid‐State Batteries Using Ionic Liquid‐Based Interlayers

Pervez, Syed Atif 1; Kim, Guktae 1; Vinayan, Bhaghavathi P. 1; Cambaz, Musa A. 1; Kuenzel, Matthias 1; Hekmatfar, Maral 1; Fichtner, Maximilian 2; Passerini, Stefano 1
1 Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

Li-garnets are promising inorganic ceramic solid electrolytes for lithium metal batteries, showing good electrochemical stability with Li anode. However, their brittle and stiff nature restricts their intimate contact with both the electrodes, hence presenting high interfacial resistance to the ionic mobility. To address this issue, a strategy employing ionic liquid electrolyte (ILE) thin interlayers at the electrodes/electrolyte interfaces is adopted, which helps overcome the barrier for ion transport. The chemically stable ILE improves the electrodes-solid electrolyte contact, significantly reducing the interfacial resistance at both the positive and negative electrodes interfaces. This results in the more homogeneous deposition of metallic lithium at the negative electrode, suppressing the dendrite growth across the solid electrolyte even at high current densities of 0.3 mA cm$^{-2}$. Further, the improved interface Li/electrolyte interface results in decreasing the overpotential of symmetric Li/Li cells from 1.35 to 0.35 V. The ILE modified Li/LLZO/LFP cells stacked either in monopolar or bipolar configurations show excellent electrochemical performance. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000117762
Veröffentlicht am 17.03.2020
DOI: 10.1002/smll.202000279
Zitationen: 41
Web of Science
Zitationen: 39
Zitationen: 46
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 09.04.2020
Sprache Englisch
Identifikator ISSN: 1613-6810, 1613-6829
KITopen-ID: 1000117762
HGF-Programm 37.01.01 (POF III, LK 01) Fundamentals and Materials
Erschienen in Small
Verlag John Wiley and Sons
Band 16
Heft 14
Seiten Art.Nr. 2000279
Vorab online veröffentlicht am 27.02.2020
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