Micro-Pseudocapacitors with Electroactive Polymer Electrodes: Toward AC-Line Filtering Applications

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• 作者：Narendra Kurra ; Qiu Jiang ; Ahad Syed ; Chuan Xia ; Husam N Alshareef
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：May 25, 2016
• 年：2016
• 卷：8
• 期：20
• 页码：12748-12755
• 全文大小：470K
• 年卷期：0
• ISSN：1944-8252

文摘

In this study, we investigate the frequency response of micro-pseudocapacitors based on conducting polymer electrodes such as poly(3,4-ethylenedioxythiophene) (PEDOT), polypyrrole, and polyaniline. It is shown that by proper choice of polymeric material and device structure, miniaturized micro-pseudocapacitors can match the frequency response of commercial bulky electrolytic capacitors. Specifically, we show that PEDOT-based micro-pseudocapacitors exhibit phase angle of −80.5° at 120 Hz, which is comparable to commercial bulky electrolytic capacitors, but with an order of magnitude higher capacitance density (3 FV/cm³). The tradeoff between the areal capacitance (C_A) and frequency response in the two-dimensional architecture (C_A = 0.15 mF/cm², phase angle of −80.5° at 120 Hz) is improved by designing three-dimensional thin-film architecture (C_A = 1.3 mF/cm², phase angle of −60° at 120 Hz). Our work demonstrates that fast frequency response can be achieved using electroactive polymer electrodes.