High-frequency response porous PEDOT: PSS thin-film material and preparation method and application thereof

Abstract

The invention discloses a high-frequency response porous PEDOT: 1. PSS thin-film material. The preparation method is based on a high-molecular polymer PEDOT / PSS (poly 3, 4-ethylenedioxythiophene / polystyrene sulfonate). The preparation method comprises the following steps of: adding a polar cosolvent DMSO (dimethyl sulfoxide) into a PEDOT / PSS aqueous solution; uniformly stirring, spin-coating filter paper with the mixed solution, putting the PEDOT: PSS thin film material into a drying oven, drying at 80 DEG C for 10 minutes, treating with concentrated sulfuric acid at room temperature for 12-24hours, washing with deionized water, and finally drying to obtain the high-frequency response porous PEDOT: PSS thin-film material. The supercapacitor prepared from the high-frequency response porousPEDOT: PSS thin-film material has the advantages of high energy density, small internal resistance and good high-frequency responsiveness.

Description

technical field [0001] The invention belongs to the field of filter capacitors, and in particular relates to a high-frequency response porous PEDOT:PSS film material and its preparation method and application. Background technique [0002] In recent years, Internet of Things (IoT) technologies have facilitated the development of renewable microgenerators that harvest environmental energy such as wind energy, friction energy, and vibration energy. However, the low-frequency pulse signal of the micro-generator is inefficient and needs to be rectified and filtered to obtain a stable and continuous DC signal. Electrochemical capacitors (ECs) have the advantages of simple construction, high specific capacitance, good rate capability, and frequency adaptability, providing promising candidates for next-generation filtering devices. [0003] Conductive polymer electrode materials have good rate performance and a specific capacitance much larger than ordinary carbon electrode materi...

AI Technical Summary

Problems solved by technology

In recent years, the conductive polymer material PEDOT:PSS (poly3,4-ethylenedioxythiophene / polystyrene sulfonate) is used to prepare filter supercapacitors, which is becoming a research hotspot, but the PSS chain in polymer electrode materials On the one hand, the transport of charges is limited, on the other hand, the exposure of the active sites of PEDOT is hindered, and the internal resistance caused by the electrode material itself is very large. Therefore, a new method for the preparation of conductive polymer electrode materials is adopted. During the process, the surface morphology (pore, particle shape, and grain dispersion) of the polymer electrode material is controlled to improve the wettability of the electrolyte, thereby improving the rate performance of the conductive polymer electrode material, reducing the internal resistance of the electrode, and improving Its energy density is very important and meaningful

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