Superior electrocatalytic responses of InGaZnO composite electrode for viologen-based electrochromic supercapacitors

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-04-21 DOI:10.1016/j.compositesb.2025.112557

Raksha Pal , Fayong Sun , Soo Yeon Eom , Manoj M. Rajpure , Beomjin Jeong , Jong S. Park

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Abstract

Dual-functional electrochromic devices (ECDs) with low-voltage operation and integrated energy storage are crucial for advancing electrochromic supercapacitors (ECSs), simultaneously offering electrochromic optical switchings and faradaic charge storage. This study presents a fast-switching, high-performance ECS incorporating an InGaZnO (IGZO)-modified fluorine-doped tin oxide (FTO) composite electrode (IGZO@FTO). The ECDs assembled using IGZO@FTO as the working electrode show fast switching times and superior coloration efficiency as the IGZO layer enhances the interfacial electrochemical reaction rate. In addition, the ECSs fabricated with an electrospun TiO₂ as an ion storage layer alleviate slow switching kinetics of viologen reductions, proving outstanding dual-functionality with rapid switching (6 s/12 s), superior coloration efficiency (182.05 cm²/C), and high areal capacitance (37.8 mF/cm²). Furthermore, the IGZO layer reveals significantly higher energy recovery efficiency, reaching over 72 %, attributed to its highly amorphous structure that enhances electron transfer and reaction kinetics. These findings highlight the superior electrocatalytic performance of IGZO-modified electrodes, establishing a promising paradigm for next-generation multifunctional ECDs with rapid response times, high energy efficiency, and broad application potential.

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InGaZnO复合电极对紫外光基电致变色超级电容器优异的电催化性能

具有低压操作和集成能量存储的双功能电致变色器件（ECDs）是发展电致变色超级电容器（ECSs）的关键，同时提供电致变色光开关和法拉第电荷存储。本研究提出了一种结合InGaZnO （IGZO）修饰的掺氟氧化锡（FTO）复合电极的快速开关高性能ECS （IGZO@FTO）。由于IGZO层提高了界面电化学反应速率，以IGZO@FTO为工作电极组装的ECDs具有快速的开关时间和优异的显色效率。此外，用静电纺丝TiO2作为离子存储层制备的ECSs缓解了紫素还原的缓慢切换动力学，证明了出色的双功能，具有快速切换（6 s/12 s），优越的显色效率（182.05 cm2/C）和高面积电容（37.8 mF/cm2）。此外，由于其高度非晶结构增强了电子转移和反应动力学，IGZO层显示出更高的能量回收效率，达到72%以上。这些发现突出了igzo修饰电极优越的电催化性能，为下一代多功能ECDs建立了一个有希望的范例，具有快速响应时间、高能效和广泛的应用潜力。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.