In situ SERS spectroscopy of Ag-modified pyrolytic graphite in organic electrolytes

Takashi Itoh, Koji Abe, Mohamed Mohamedi, Matsuhiko Nishizawa, Isamu Uchida

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Surface enhanced Raman scattering (SERS) has been applied to study the lithium intercalation/ deintercalation process at the interface of a pyrolytic graphite electrode with propylene and ethylene carbonate containing organic solutions. We have focused on the lattice vibration of the most outer graphite surface layer simultaneously with cyclic voltammetric measurements. In situ Raman spectroscopy performed in this way allowed us to determine the La value that describes the size of graphitic microcrystallites along the a-axis. It was found that the La value decreases when the electrode is polarized to potentials between 0.02 and 1.0 V. This phenomenon can be correlated with the intercalation of lithium ions into the graphene structure. According to the spectral change, the size of the graphitic microcrystallites shows reversible behavior with potential cycling at the surface of the electrode.

本文言語English
ページ(範囲)328-333
ページ数6
ジャーナルJournal of Solid State Electrochemistry
5
5
DOI
出版ステータスPublished - 2001 12 1

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 電気化学
  • 電子工学および電気工学

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