Dynamic Observation of Molecular Movement at Interface Between Electrode and Solid Polymer Electrolyte by Using In Situ FTIR Spectroscopy

利用原位 FTIR 光谱动态观察电极与固体聚合物电解质界面处的分子运动

• 批准号: 08455394
• 负责人: KANAMURA Kiyoshi
• 金额: $ 4.86万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455394/
• 关键词: in situ FTIR; Solid Polymer Electrolyte; Pt electrode; dynamic observation; Nafion; hydrophilic; hydrophobic; Interface; パ-フルオロスルホン酸; その場赤外吸収分光法; 吸着; 内部反射法; 高分子鎖の運動

Solid polymer electrolytes have been studied as important materials used in fuel cells, rechargeable lithium batteries, and sensors. In this study, we investigated a dynamic behavior of solid polymer electrolytes at interfaces between a solid electrodes and them. So far, many instrumental techniques have been developed in order to observe such interfaces consisting of polymers and metal electrodes. An in situ FTIR measurement is one of useful tools for detection physical and chemical changes of such interfaces. In early state of this project, we developed the measurement system of in situ FTIR with an internal reflectance. At the secons stage, the interfacial dynamic change of Nafion and Pt electrode interface was investigated. The results obtained from this study were summarized as follows.(1)A dynamic change of chemical compositions of a surface film on lithium metal in nonaqueous electrolytes was investigated in order to confirm a reliability of our measurement system.(2)An adsorption behavior of CF_3(CF_2)_7SO_3H,which was used as a model compound of nafion, was examined. An adsorption behavior on the Pt electrode depended on the electrode potential and the concentration of CF_3(CF_2)_7SO_3H.(3)The Nafion film was casted on the Pt electrode and then it was soaked by HClO_4 aqueous electrolvte. In the course of these processes, the dynamic behavior of the interface between the Nafion and the Pt was observed by using in situ FTIR measurement. It was found that the chemical and physical states were changed by these treatments. Moreover, they were changed by the electrode potential.(4)A micro-phase separation of the Nafion membrane was detected by using an atomic force microscopy and a surface potential detection.

固体聚合物电解质已被研究作为燃料电池、可充电锂电池和传感器的重要材料。在这项研究中，我们研究了固体聚合物电解质在固体电极和它们之间的界面上的动态行为。到目前为止，为了观察这种由聚合物和金属电极组成的界面，已经开发了许多仪器技术。原位傅立叶红外测量是检测这些界面的物理和化学变化的有用工具之一。在项目前期，我们开发了具有内反射率的原位FTIR测量系统。在第二阶段，研究了Nafion和Pt电极界面的动态变化。本研究所得结果总结如下：(1)研究了非水电解质中金属锂表面膜化学成分的动态变化，以验证该测量系统的可靠性。(2)考察了以CF_3(CF_2)_7SO_3H为模型化合物的吸附行为。Pt电极上的吸附行为取决于电极电位和CF_3(CF_2)_7SO_3H浓度。(3)在Pt电极上浇铸Nafion薄膜，然后用HClO_4水溶液浸泡。在此过程中，采用原位FTIR测量方法观察了ni - Pt界面的动态行为。研究发现，这些处理改变了化学和物理状态。此外，它们还受到电极电位的影响。(4)采用原子力显微镜和表面电位检测方法检测了Nafion膜的微相分离。

项目成果

Kiyoshi Kanamura et al.: "Dynamic Observation of Surface Reaction of Lithium Foils Immersed in Diethyl Carbonate Electrolytes by Using in situ FTIR" DENKIKAGAKU. 66, No.3. 272-278 (1998)

Kiyoshi Kanamura 等人：“利用原位 FTIR 动态观察浸没在碳酸二乙酯电解质中的锂箔的表面反应”DENKIKAGAKU。

Kiyoshi Kanamura et al.: "Chemical Reactions of Lithium Surface During Immersion in LiClO_4 or LiPF_6/DEC Electrolyte" J.Electrochem.Soc.144, No.7. 1900-1906 (1997)

Kiyoshi Kanamura 等人：“LiClO_4 或 LiPF_6/DEC 电解质浸没期间锂表面的化学反应”J.Electrochem.Soc.144，No.7。

Kiyoshi Kanamura et al.: "Study on Dynamic behavior of Diethyl Carbonate Electrolytes on Lithium Metal Surface Using In Situ FTIR Spectroscopy" Chemistry Letters. 1997. 41-42 (1997)

Kiyoshi Kanamura 等人：“利用原位 FTIR 光谱研究碳酸二乙酯电解质在锂金属表面上的动态行为”化学快报。

Kiyoshi Kanamura: "Study on Dynamic Bahavior of Diethyl Carbonate Electrolyte on Lithium Metal Surface Using In Situ FTIR Spectroscopy" Chemistry Letters. 1997. 41-42 (1997)

Kiyoshi Kanamura：“利用原位 FTIR 光谱研究碳酸二乙酯电解质在锂金属表面的动态行为”化学快报。

Kiyoshi Kanamura et.al.: "Chemical Reactions of Lithium Surface During Immersion in LiClO_4 or LiPF_6/DEC Electrolyte" J.Electrochem.Soc.144,No.7. 1900-1906 (1997)

Kiyoshi Kanamura 等人：“LiClO_4 或 LiPF_6/DEC 电解质浸没期间锂表面的化学反应”J.Electrochem.Soc.144，No.7。