材料科学
电极
电容
介电谱
循环伏安法
电化学
四氟乙烯
复合材料
活性炭
电流密度
聚四氟乙烯
分析化学(期刊)
化学工程
化学
聚合物
有机化学
物理化学
吸附
工程类
物理
量子力学
共聚物
作者
Pelin Ozpinar,Ceren Doğan,Hakan Demiral,Uğur Moralı,Salim Erol,Derya Yıldız,Canan Samdan,İlknur Demiral
标识
DOI:10.1016/j.diamond.2023.110092
摘要
In this study, the electrochemical performance of the electrode materials based on two commonly used binders –poly(vinylidene difluoride) (PVDF) and poly(tetrafluoroethylene) (PTFE)– was introduced. The electrochemical performance of the activated carbon electrodes was explored by performing cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy techniques. The results showed that the activated carbon electrode prepared at 500 °C with PTFE (AC-500-PTFE) exhibited higher capacitance values at low current rates than the one with PVDF (AC-500-PVDF). The results also revealed that the capacitance values of the AC-500-PVDF electrode for the current rates higher than 1.5 A g−1 were higher than the AC-500-PTFE electrode. The implemented transmission line equivalent circuit model for impedance showed that the capacitance inside the pores was higher for the AC-500-PVDF, and the higher capacitance on the electrode surface was obtained for the AC-500-PTFE. As a result, it is recommended to prefer PTFE binder for low current density, yet a PVDF binder for high current density applications.
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