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The Formation of the Solid/Liquid Electrolyte Interphase (SLEI) on NASICON‐Type Glass Ceramics and LiPON
Author(s) -
Busche Martin R.,
Weiss Manuel,
Leichtweiss Thomas,
Fiedler Carsten,
Drossel Thomas,
Geiss Matthias,
Kronenberger Achim,
Weber Dominik A.,
Janek Jürgen
Publication year - 2020
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202000380
Subject(s) - electrolyte , materials science , fast ion conductor , electrode , electrochemistry , cathode , chemical engineering , electrochemical window , secondary ion mass spectrometry , lithium (medication) , dielectric spectroscopy , inorganic chemistry , analytical chemistry (journal) , ion , ionic conductivity , chemistry , medicine , organic chemistry , engineering , endocrinology , chromatography
Most electrochemical energy storages (battery cells) consist of solid electrodes separated by a liquid electrolyte. If electrode materials are—at least partially—soluble in the electrolyte, detrimental mass transport between both electrodes (electrode cross‐talk) occurs. The shuttle mechanism in lithium–sulfur batteries and leaching of Mn in high voltage cathode materials are important examples. Implementing a solid electrolyte (SE) membrane between the electrodes is a comprehensible approach to suppress undesired mass transport but additional resistances arise due to charge transport across the SE and charge transfer through the solid/liquid electrolyte interfaces. The latter contribution is often overlooked as its determination is challenging; however, these interface properties are crucial for practical application. In previous work, a resistive solid/liquid electrolyte interphase “SLEI” has been found at the interface between the SE lithium aluminum germanium phosphate in contact with a liquid ether‐based electrolyte. Here, the aim is deeper insight into this interphase formation, referring to a lithium‐ion conducting glass ceramic (NASICON‐type) and the commonly used thin‐film ion conductor lithium phosphorous oxide nitride. The growth of the SLEI is monitored by a combination of electrochemical characterization, X‐ray photoelectron spectroscopy, and time‐of‐flight secondary ion mass spectrometry.