SEI investigations on copper electrodes after lithium plating with Raman spectroscopy and mass spectrometry

Schmitz R., Ansgar Muller R., Wilhelm Schmitz R., Schreiner C., Kunze M., Lex-Balducci A., Passerini S., Winter M.

Research article (journal) | Peer reviewed

Abstract

The composition and formation of the SEI which is formed on lithium, which has been electrochemically deposited on a Cu substrate, is investigated by Raman spectroscopy and mass spectrometry. Semicarbonates, Li2CO 3 and Li2C2 are identified as SEI components. The existence of Li2C2 is further proven with mass spectrometry by analyzing the gases which are formed by hydrolysis. Raman mapping reveals that Li2CO3 is homogeneously distributed over the copper substrate, on which lithium was deposited. At contrast, Li 2C2 is mainly located on the plated lithium. An in situ Raman spectroscopy method for SEI investigation was developed and shows that Li2C2 is not formed at a potential >0 V vs. Li/Li +. © 2013 Elsevier B.V. All rights reserved.

Details about the publication

JournalJournal of Power Sources
Volume233
Issuenull
Page range110-114
StatusPublished
Release year2013
Language in which the publication is writtenEnglish
DOI10.1016/j.jpowsour.2013.01.105
Link to the full texthttp://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84873663112
KeywordsLithium; Mass spectrometry; Raman; Raman mapping; SEI; SERS

Authors from the University of Münster

Lex-Balducci, Alexandra
Institute of Physical Chemistry