PUB-2016-MPW

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

​Narendra Kurra, Qiu Jiang, Ahad Syed, Chuan Xia, and Husam N Alshareef, "Micro-Pseudocapacitors with Electroactive Polymer Electrodes: Toward AC-Line Filtering Applications"
​ACS Appl. Mater. Interfaces, 2016, 8 (20), pp 12748–12755
Narendra Kurra, Qiu Jiang, Ahad Syed, Chuan Xia, and Husam N Alshareef
ac-line filtering; conducting polymer; electrochemical capacitor; micro-pseudocapacitor; thin film
2016
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 (CA) and frequency response in the two-dimensional architecture (CA = 0.15 mF/cm2, phase angle of −80.5° at 120 Hz) is improved by designing three-dimensional thin-film architecture (CA = 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.