The electrode optimization and rational design are of great significance for the performance enhancement of self-powered electrochromic devices (ECDs). It can be effectively enhanced by developing interfacial properties of electrodes, which can promote the internal ion transport within functional components consisting of an electrode, electrochromic layer, and electrolyte layer and thus obtain performance improvement of fabricated devices. This work aims to construct the electrode of poly(3,4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT:PSS) on different substrates and promote interface performance of the prepared electrodes via inheriting the surface topography of substrates. Besides, the prepared PEDOT:PSS electrodes as a dual-function layer including the electrochromic and electrode layer are employed to assemble the ECDs. It is found that the intrinsic roughness of the paper substrate can facilitate the electrochemical performance of the prepared PEDOT:PSS electrode on it effectively, thereby showing a superior electrochemical surface area and diffusion coefficient as well as a lower charge-transfer resistance of 13.56 Ω. Similarly, for the prepared self-powered ECD on the paper substrate, it also indicates a high light absorption property (0.413), well-defined electrochromic contrast (33.09), fast switching (τ_c = 4.0 s, τ_b = 6.8 s), high coloration efficiency (92.275 cm² C^–1), high areal capacity (10.93 mAh m^–2) at 0.01 mA cm^–2, and lower equivalent series resistance (176.2 Ω) in comparison to parallel ECDs on the PET and glass substrate. Leveraging the intrinsic roughness of the substrate is able to enhance the electrochemical performance of electrodes, which can also provide a new strategy for the construction of high-performance self-powered ECDs.

中文翻译：

---

通过继承衬底固有粗糙度的 PEDOT：PSS 电极增强自供电电致变色器件的性能


电极优化和合理设计对于自供电电致变色器件 （ECD） 的性能提升具有重要意义。它可以通过发展电极的界面性能来有效增强，这可以促进由电极、电致变色层和电解质层组成的功能组件内部的离子传输，从而获得制造器件的性能改进。本工作旨在在不同衬底上构建聚（3,4-乙烯二氧噻吩）：聚苯乙烯磺酸盐 （PEDOT：PSS） 的电极，并通过继承衬底的表面形貌来促进所制备电极的界面性能。此外，制备的 PEDOT：PSS 电极作为包括电致变色层和电极层在内的双重功能层用于组装 ECD。研究发现，纸基板的本征粗糙度可以有效地促进所制备的 PEDOT：PSS 电极在其上的电化学性能，从而表现出优异的电化学表面积和扩散系数以及较低的 13.56 Ω电荷转移电阻。同样，对于在纸基板上制备的自供电 ECD，与 PET 和玻璃基板上的并行 ECD 相比，它还表明具有高光吸收特性 （0.413）、明确的电致变色对比度 （33.09）、快速切换 （τ_c = 4.0 s，τ_b = 6.8 s）、高着色效率 （92.275 cm² C^–1）、在 0.01 mA ^cm-2 时的高面容量 （10.93 mAh m^–2） 和较低的等效串联电阻 （176.2 Ω）。 利用基板固有的粗糙度能够增强电极的电化学性能，这也可以为构建高性能自供电 ECD 提供新的策略。