In situ Fe K-edge X-ray absorption fine structure of a pyrite electrode in a Li/polyethylene oxide(LiClO4)/FeS2 battery environment

Dana A. Totir, In Tae Bae, Yining Hu, Mark R. Antonio, Mark A. Stan, Daniel Alberto Scherson*

*この研究の対応する著者

研究成果: Article査読

37 被引用数 (Scopus)

抄録

Electronic and structural properties of materials generated by the reduction and subsequent oxidation of pyrite (FeS2) in a Li+-based solid polymer electrolyte (SPE) have been examined in situ by fluorescence Fe K-edge X-ray absorption fine structure (XAFS) in a Li/SPE/FeS2 battery environment. The in situ X-ray absorption near edge structure (XANES) of fully, i.e., four-electron, discharged FeS2 displayed features consistent with the presence of metallic iron, in agreement with information derived from in situ X-ray diffraction (XRD) and in situ 57Fe Mossbauer effect spectroscopy (MES) reported by other groups. The two-electron reoxidation (half-recharge) of such fully reduced material yielded an in situ XANES very similar to that of genuine crystalline Li2FeS2 prepared and characterized in this laboratory. These spectroscopic findings support conclusions made purely on the basis of electrochemical information, which identified Li2FeS2 as an intermediate in the charge-discharge mechanism of FeS2 in room-temperature Li+-containing electrolytes.

本文言語English
ページ(範囲)9751-9756
ページ数6
ジャーナルJournal of Physical Chemistry B
101
47
出版ステータスPublished - 1997 11 20
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 表面、皮膜および薄膜
  • 材料化学

フィンガープリント

「In situ Fe K-edge X-ray absorption fine structure of a pyrite electrode in a Li/polyethylene oxide(LiClO<sub>4</sub>)/FeS<sub>2</sub> battery environment」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル