Fig. 5: AC line filter application at room temperature and low temperature.

a Schematic of PEDOT-based AC line filter on Ti/Au interdigitated electrodes (PEDOT MSCs). b The optical photo of PEDOT MSC. c CV curves of PEDOT MSCs at different scan rates. Impedance phase angle on the frequency for PEDOT MSCs and commercial 220 μF aluminum electrolytic capacitors (AECs) at c +25 °C, d −70 °C, e −95 °C. f Areal capacitance versus frequency of PEDOT MSCs and commercial 220 μF AEC at +25 °C and −95 °C. AC line-filtering performance of g commercial 220 μF AEC and h PEDOT MSCs at +25 °C and −70 °C.