Polyvinylidene fluoride membranes probed by electrochemical impedance spectroscopy

作者：Qizhao Luo, Qing Huang, Zhe Chen, Lei Yao, Ping Fu, Zhidong Lin · 发表于：Materials Research Express · 年份：2018 · DOI：10.1088/2053-1591/aac7f2 · 被引用次数：7 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Conducting polymers and applications、Analytical Chemistry and Sensors

Electrochemical impedance spectroscopy (EIS) has been applied to characterize the structure of polyvinylidene fluoride (PVDF) membranes. The characteristic frequency, which directly obtained from the original EIS data, was used to clarify the difference of the membranes’ structures. The experimental data indicated the equivalence between the characteristic frequency and the membrane resistance fitted from the equivalent circuit. The results evidenced that the characteristic frequency obtained directly from original EIS data without any fitting calculation can be used for in situ characterizing a membrane instead of the membrane resistance.