Facile synthesis of Ce2(WO4)3-decorated polyaniline composites as promising electrode material for supercapacitor applications

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL Ionics Pub Date : 2024-07-09 DOI:10.1007/s11581-024-05676-1

J. Aarthi, S. Rajkumar, S. Gowri, J. Princy Merlin, K. Kirubavathi, K. Selvaraju

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Abstract

In the present work, rare earth metal oxides composed of cerium tungstate/polyaniline (Ce₂(WO₄)₃/PANI) composites were prepared by an in situ chemical oxidative polymerization process and their supercapacitive behavior was evaluated. The structural and morphological properties of the Ce₂(WO₄)₃/PANI composites were characterized via spectral and analytical techniques. X-ray diffraction revealed that the two prominent peaks for Ce₂(WO₄)₃ and PANI located at 2θ = 28.3° and 25.4° were in good accordance with the observed 2θ values in Ce₂(WO₄)₃/PANI composite. Field-emission scanning electron microscopy (FESEM) studies of Ce₂(WO₄)₃/PANI had a nano-spherical interconnected with a layer-like morphology, which results in a rapid electron exchange. Electrochemical analysis revealed that Ce₂(WO₄)₃/PANI exhibited an increased supercapacitor electrode response with a significant specific capacity (C_s) of 399 C g⁻¹ at 1 Ag⁻¹ and exhibited a remarkable capacity retention of 90.5% even after 3000 galvanostatic charge-discharge (GCD) cycles with 84% columbic efficiency, suggesting its promising electrode material for SCs.

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简便合成 Ce2(WO4)3 装饰聚苯胺复合材料，将其作为超级电容器应用的理想电极材料

本研究采用原位化学氧化聚合工艺制备了由钨酸铈/聚苯胺（Ce2(WO4)3/PANI）组成的稀土金属氧化物复合材料，并对其超级电容器行为进行了评估。通过光谱和分析技术对 Ce2(WO4)3/PANI 复合材料的结构和形态特性进行了表征。X 射线衍射显示，Ce2(WO4)3 和 PANI 的两个突出峰值分别位于 2θ = 28.3° 和 25.4°，这与在 Ce2(WO4)3/PANI 复合材料中观察到的 2θ 值十分吻合。对 Ce2(WO4)3/PANI 的场发射扫描电子显微镜（FESEM）研究表明，其具有纳米球状的层状相互连接形态，这导致了快速的电子交换。电化学分析表明，Ce2(WO4)3/PANI 显示出更高的超级电容器电极响应，在 1 Ag-1 的条件下，比容量 (Cs) 达到 399 C g-1，即使经过 3000 次电静态充放电 (GCD) 循环后，容量保持率仍高达 90.5%，电容效率为 84%，这表明其有望成为超级电容器的电极材料。

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.