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Development of a new Electrochemical Impedance Spectroscopy Approach for Monitoring the Solid Electrolyte Interphase Formation
Author(s) -
Heins Tom P.,
Harms Nina,
Schramm LindaSusann,
Schröder Uwe
Publication year - 2016
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600132
Subject(s) - interphase , electrolyte , dielectric spectroscopy , electrochemistry , electrode , anode , materials science , chemical engineering , battery (electricity) , lithium (medication) , electrical impedance , chemical physics , fast ion conductor , analytical chemistry (journal) , chemistry , thermodynamics , electrical engineering , chromatography , genetics , engineering , biology , medicine , power (physics) , physics , endocrinology
The formation of surface films on lithium ion electrodes is a crucial factor for the performance and durability of the respective battery. Especially the formation of the solid electrolyte interphase (SEI) on the anodes of these cells widely determines the stability and functionality of the electrode. Therefore, a precise insight into the formation process of this layer is required. Based on temperature‐dependent electrochemical impedance spectroscopy a new approach to monitor the formation of the SEI was developed. This way the kinetics of the interphase could be described using its activation energy. Comparison of these values with the respective resistances regarding the charge turnover during the initial charging of the cell provided additional information about the course of the SEI formation. It could be shown that these findings are in good agreement with the descriptions of the mechanism of the SEI formation provided by the literature.