Rapid fabrication of zinc oxide/cobalt oxide based electrochromic electrodes via electrodeposition for enhanced performance electrochromic supercapacitors

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2025-09-18 DOI:10.1016/j.jelechem.2025.119478

Muhammad Norhaffis Mustafa , Nur Najwa Abdul Talib , Farah Ezzah Ab Latif , Arshid Numan

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引用次数: 0

Abstract

Electrochromic supercapacitors (ECSCs) have attracted significant attention due to their potential for simultaneous energy storage and optical modulation. However, achieving high performance in electrochemical and electrochromic properties remains challenging. Therefore, optimizing the fabrication of high-performance electrochromic materials is crucial. The oxide composites, such as zinc oxide (ZnO) and cobalt oxide (CoO), can deliver enhanced electrochemical and optical characteristics of ECSCs. This study presents the fabrication and optimization of a zinc oxide/cobalt oxide (ZCO) composite via a facile electrodeposition and response surface methodology to enhance the electrochromic and energy storage properties of supercapacitors. The ZCO electrode was fabricated on a conductive substrate using an electrodeposition technique. The electrochemical properties were characterized using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The electrochromic performance was evaluated by monitoring the colour change during cycling and measuring the transmittance variation of visible light. The ZCO electrode exhibited significantly improved electrochemical performance compared to individual ZnO or CoO electrodes. The composite showed high specific capacitance (894 F/g, 1 mV/s), excellent cycling stability (80.1 %, 10000 cycles), and enhanced electrochromic behaviour (297.48 cm²/C) with a reversible colour transition. The composite electrode demonstrated a remarkable improvement in optical contrast and energy storage capacity, indicating a synergistic effect between ZnO and CoO. The ZCO composite fabricated by electrodeposition offers a promising, scalable, and cost-effective approach for advanced electrochromic supercapacitors with enhanced electrochemical and optical performance, suitable for next-generation energy storage devices with integrated display functionalities.

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电沉积法快速制备氧化锌/氧化钴基电致变色电极，提高电致变色超级电容器的性能

电致变色超级电容器（ECSCs）由于其同时具有能量存储和光调制的潜力而引起了人们的广泛关注。然而，实现电化学和电致变色性能的高性能仍然具有挑战性。因此，优化高性能电致变色材料的制造是至关重要的。氧化锌（ZnO）和氧化钴（CoO）等氧化物复合材料可以增强ECSCs的电化学和光学特性。本研究提出了一种氧化锌/氧化钴（ZCO）复合材料的制备和优化，通过简单的电沉积和响应面方法来提高超级电容器的电致变色和储能性能。采用电沉积技术在导电衬底上制备了ZCO电极。采用循环伏安法（CV）、恒流充放电法（GCD）和电化学阻抗谱法（EIS）对其电化学性能进行了表征。通过监测循环过程中的颜色变化和测量可见光透过率变化来评估电致变色性能。与单独的ZnO或CoO电极相比，ZCO电极的电化学性能显著提高。该复合材料具有较高的比电容（894 F/g, 1 mV/s），良好的循环稳定性（80.1%，10000次循环）和增强的电致变色行为（297.48 cm2/C），具有可逆的颜色过渡。复合电极在光学对比度和能量存储能力方面表现出显著的改善，表明ZnO和CoO之间存在协同效应。电沉积制备的ZCO复合材料为先进的电致变色超级电容器提供了一种有前途的、可扩展的、经济高效的方法，具有增强的电化学和光学性能，适用于具有集成显示功能的下一代储能设备。

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.