The discharge characteristics of FeOCl in an aprotic organic solvent.

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概要

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• The discharge reaction of FeOCl was investigated and the discharge products were identified by XRD and EPMA. Lithium and solvent co-intercalate into FeOCl during the early stage of the discharge, in the low lithium concentration range in the FeOCl solid matrix (Li<I><SUB>x</SUB></I>FeOCl, <I>x</I><0.6). Such compounds are stable. However, at higher concentrations of lithium, FeOCl co-intercalated by lithium and solvent gradually decompose to yield α-Fe and other compounds. The results show that three electrons are consumed during the discharge. On the other hand, the discharge curve of FeOCl in propylene carbonate containing 1.0 M LiBF<SUB>4</SUB> indicates only a single charge transfer step. Therefore, the reaction mechanism of FeOCl can be explained by the intercalation of lithium in FeOCl followed by the decomposition of the intercalation compound formed between FeOCl, lithium and the solvent. The structure of FeOCl intercalated by lithium changes during the course of immersion in various solvents. This fact indicates that the solvent can easily intercalate into FeOCl and deintercalate from FeOCl. Such a behavior may arise from a weakening of the interaction between FeOCl layers after lithium intercalation, since the intercalation of lithium into FeOCl influences the chemical bonds in FeOCl. As a result, the interaction between FeOCl layers becomes weaker. Therefore, the intercalation and deintercalation of the solvent can easily take place. The stability of the FeOCl structure after cathodic reduction does not depend only on the concentration of lithium in FeOCl, but also on the kind of solvent.

• 公益社団法人 日本化学会の論文

著者

• Takehara Zen-ichiro

  Department Of Chemical Engineering Faculty Of Engineering Kansai University

• Kanamura Kiyoshi

  Department Of Applied Chemistry Graduate School Of Engineering Tokyo Metropolitan University

• Imanishi Nobuyuki

  Department Of Chemistry Faculty Of Engineering Mie University

• Imanishi Nobuyuki

  Department of Industrial Chemistry, Faculty of Engineering, Kyoto University

• Zhen Chen

  Department of Industrial Chemistry, Faculty of Engineering, Kyoto University

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