In situ observation of tin negative electrode / electrolyte interface by X-ray reflectivity

Koki Shimada, Tomoya Kawaguchi, Tetsu Ichitsubo, Eiichiro Matsubara, Katsutoshi Fukuda, Yoshiharu Uchimoto, Zempachi Ogumi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

An electrode/electrolyte interface is obviously one of the most dominant factors controlling a battery performance. In the present work, a formation of a tin negative electrode/electrolyte interface (SEI) was investigated by an in situ X-ray reflectivity measurement. SEI was formed even at a high voltage of about 2.5 V vs Li/Li+. This voltage is much higher than the value of about 1.5 V in the previous works. Thus, SEI in the present work is clearly different from that formed by reductive decomposition of an electrolyte and/or reduction of Sn oxide. Its structure was seemingly an amorphous solid containing a quite amount of fluoride, which grows up to 150-200 nm thick by keeping for 1 h at about 2.5-2.6 V.

Original languageEnglish
Title of host publicationInterfaces and Interphases in Battery Systems
Pages31-37
Number of pages7
Edition1
DOIs
Publication statusPublished - 2012 Dec 1
Externally publishedYes
EventInterfaces and Interphases in Battery Systems - PRiME 2012 - Honolulu, HI, United States
Duration: 2012 Oct 72012 Oct 12

Publication series

NameECS Transactions
Number1
Volume50
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherInterfaces and Interphases in Battery Systems - PRiME 2012
CountryUnited States
CityHonolulu, HI
Period12/10/712/10/12

ASJC Scopus subject areas

  • Engineering(all)

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