Zartasha Sarwar, Aqsa Akram, Muhammad Umair, Aqeel Ahmed Shah, Naveed Akhtar Shad, Abdullah Algethami, Muhammad Khawar Abbas, Hafiz T. Ali, Yasir Javed, Sumara Ashraf
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引用次数: 0
Abstract
Rapid advancements in transportation, optoelectronics, and portable electronic devices are accelerating the transition toward sustainable energy solutions. Hybrid supercapacitors are increasingly recognized as efficient energy storage systems, attracting considerable interest because of their adaptable configurations and enhanced electrochemical performance. Nevertheless, advancing electrode materials with improved electrochemical performance is essential for enhancing specific capacity, long-term cycling durability, and energy density. In this work, CuO, reduced graphene oxide (rGO)/CuO, and CeO2/CuO nanocomposites were synthesized using a hydrothermal approach. The prepared nanomaterials were systematically characterized to evaluate their structural, functional, optical, and morphological features using x-ray diffraction (XRD), Raman, Fourier-transform infrared (FTIR), photoluminescence (PL), and ultraviolet–visible spectroscopy, and scanning electron microscopy (SEM). Electrochemical analysis revealed that the CeO2/CuO-based electrode exhibited superior electrochemical storage performance, achieving specific capacitance of 599 F g−1 when tested at 5 mV s−1, significantly outperforming rGO/CuO (176 F g−1) and CuO (164 F g−1). To better elucidate the hybrid charge-storage mechanism of the CeO2/CuO electrode, a detailed kinetic study (Dunn’s model) was conducted to decouple surface capacitive effects from bulk diffusion contributions.
交通运输、光电子和便携式电子设备的快速发展正在加速向可持续能源解决方案的过渡。混合超级电容器作为一种高效的储能系统，因其结构适应性强、电化学性能优异而受到广泛关注。然而，改进电化学性能的电极材料对于提高比容量、长期循环耐久性和能量密度至关重要。本文采用水热法合成了CuO、还原氧化石墨烯(rGO)/CuO和CeO2/CuO纳米复合材料。利用x射线衍射（XRD）、拉曼光谱（Raman）、傅里叶变换红外光谱（FTIR）、光致发光（PL）、紫外可见光谱和扫描电子显微镜（SEM）对所制备的纳米材料进行了系统表征，以评价其结构、功能、光学和形态特征。电化学分析表明，CeO2/CuO电极具有优异的电化学存储性能，在5 mV s−1下，比电容达到599 F g−1，明显优于rGO/CuO （176 F g−1）和CuO （164 F g−1）。为了更好地阐明CeO2/CuO电极的混合电荷存储机制，进行了详细的动力学研究（Dunn模型），将表面电容效应与体扩散贡献分离开来。图形抽象
期刊介绍：
The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications.
Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field.
A journal of The Minerals, Metals & Materials Society.
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