Impedance Analyses on Porous Electrodes Considering the Distribution of Time Constants

考虑时间常数分布的多孔电极阻抗分析

• 批准号: 22560729
• 负责人: ITAGAKI Masayuki
• 金额: $ 2.58万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22560729/
• 关键词: 電気化学インピーダンス; 電気化学測定; 多孔質電極; インピーダンススペクトル; 表面・界面物性; 先端機能デバイス; 材料加工・処理

This study has been carried out to contribute to analyses on electrode structures of energy devices by applying an electrochemical impedance spectroscopy (EIS) to them. This study consists of EIS analyses on porous electrodes and cell structure analyses by finite element method (FEM). In the application of EIS, impedance spectra of porous electrode was separated depending on the frequency ranges, and itwas found that characteristic locus appeared for the porous structure in the middle frequency range. Pore size and electrolyte nature in the pore were investigated on the basis of impedance spectra. The current distribution during impedance measurement was calculated by FEM. It was found that the current distribution was changed depending on the imposed frequency. The relation between the porous structure and the characteristic impedance locus was discussed comparing the impedance results with the calculated current distribution. The analytical method developed by this study can be contributed to the material developments and operation monitoring’s of various energy devices.

本研究旨在应用电化学阻抗谱（EIS）技术对能量器件的电极结构进行分析。本研究包括多孔电极的电化学阻抗谱分析和电池结构的有限元分析。在电化学阻抗谱的应用中，多孔电极的阻抗谱在不同的频率范围内得到分离，发现多孔结构的阻抗谱在中间频率范围内出现特征轨迹。根据阻抗谱研究了孔的大小和孔中的电解质性质。用有限元法计算了阻抗测量过程中的电流分布。结果发现，电流分布的变化取决于所施加的频率。通过阻抗结果与电流分布的比较，讨论了多孔结构与阻抗轨迹的关系。本研究所发展之分析方法，可供各种能源装置之材料开发及操作监控之参考。

项目成果

Current Distribution of Dye-Sensitized solar Cells during Impedance Measurement by FEM

FEM 阻抗测量期间染料敏化太阳能电池的电流分布

• 发表时间: 2013
• 作者: T. Ohtaki;H. Hoshi;I. Shitanda;M. Itagaki
• 通讯作者: M. Itagaki