Volkov Alexey I, Apraksin Rostislav V
Department of Electrochemistry, Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya Embankment, St. Petersburg 199034, Russia.
Ioffe Institute, 26 Politekhnicheskaya str., St. Petersburg 194021, Russia.
Polymers (Basel). 2023 May 26;15(11):2468. doi: 10.3390/polym15112468.
Poly-3,4-ethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS) is a widely used conducting polymer with versatile applications in organic electronics. The addition of various salts during the preparation of PEDOT:PSS films can significantly influence their electrochemical properties. In this study, we systematically investigated the effects of different salt additives on the electrochemical properties, morphology, and structure of PEDOT:PSS films using a variety of experimental techniques, including cyclic voltammetry, electrochemical impedance spectroscopy, operando conductance measurements and in situ UV-VIS spectroelectrochemistry. Our results showed that the electrochemical properties of the films are closely related to the nature of the additives used and allowed us to establish a probable relationship with the Hofmeister series. The correlation coefficients obtained for the capacitance and Hofmeister series descriptors indicate a strong relationship between the salt additives and the electrochemical activity of PEDOT:PSS films. The work allows us to better understand the processes occurring within PEDOT:PSS films during modification with different salts. It also demonstrates the potential for fine-tuning the properties of PEDOT:PSS films by selecting appropriate salt additives. Our findings can contribute to the development of more efficient and tailored PEDOT:PSS-based devices for a wide range of applications, including supercapacitors, batteries, electrochemical transistors, and sensors.
聚3,4-乙撑二氧噻吩：聚苯乙烯磺酸盐（PEDOT:PSS）是一种广泛应用于有机电子学领域的导电聚合物。在PEDOT:PSS薄膜制备过程中添加各种盐类会显著影响其电化学性能。在本研究中，我们使用多种实验技术，包括循环伏安法、电化学阻抗谱、原位电导测量和原位紫外可见光谱电化学，系统地研究了不同盐添加剂对PEDOT:PSS薄膜的电化学性能、形态和结构的影响。我们的结果表明，薄膜的电化学性能与所用添加剂的性质密切相关，并使我们能够与霍夫迈斯特序列建立可能的关系。电容与霍夫迈斯特序列描述符的相关系数表明盐添加剂与PEDOT:PSS薄膜的电化学活性之间存在很强的关系。这项工作使我们能够更好地理解在使用不同盐类对PEDOT:PSS薄膜进行改性过程中发生的过程。它还展示了通过选择合适盐添加剂来微调PEDOT:PSS薄膜性能的潜力。我们的研究结果有助于开发更高效、定制化的基于PEDOT:PSS的器件，用于包括超级电容器、电池、电化学晶体管和传感器在内的广泛应用。
