探究脉冲激光沉积产生的钴铁氧体纳米结构的形态变化对其电化学特性的影响

IF 2 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Thin Solid Films Pub Date : 2024-09-28 DOI:10.1016/j.tsf.2024.140538

Rodrigo D. Santos , Natasha M. Suguihiro , Victor M. Paiva , Eliane D’Elia , Braulio S. Archanjo , Wallace C. Nunes

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引用次数: 0

摘要

较高的表面体积比通常会提高超级电容器电极的电容。然而，过高的孔隙率会增加电阻，从而抵消这一优势。本研究优化了 CFO（铁氧体钴）纳米粒子的压实度，以提高超级电容器的性能。在保持晶体结构和颗粒尺寸一致的前提下，通过脉冲激光沉积技术制备了不同压实度的纳米颗粒组装 CFO 薄膜。利用电子显微镜和电化学技术进行的表征显示，压实度与电容之间存在很强的相关性。与 CFO 薄膜相比，所有 CFO 纳米粒子组装薄膜都表现出更优越的伪电容行为，其中压实度最高的纳米粒子组装薄膜达到了 6 mF cm-2 的高面积电容。

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Probing the influence of morphological variations on the electrochemical properties of cobalt ferrite nanostructures produced by pulsed laser deposition

A higher surface-to-volume ratio typically enhances capacitance in supercapacitor electrodes. However, excessive porosity can increase electrical resistance, counteracting this benefit. This study optimized the compaction level of CFO (Cobalt Ferrite Oxide) nanoparticles for enhanced supercapacitor performance. Nanoparticle-assembled CFO films with varying compaction were produced via pulsed laser deposition while maintaining consistent crystal structure and particle size. Characterization using electron microscopy and electrochemical techniques revealed a strong correlation between compaction and capacitance. All CFO nanoparticle-assembled films exhibited superior pseudocapacitive behavior compared to CFO thin films, with the most compacted nanoparticle-assembled film achieving a high areal capacitance of 6 mF cm⁻².

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来源期刊

Thin Solid Films 工程技术-材料科学：膜

CiteScore

4.00

自引率

4.80%

发文量

381

审稿时长

7.5 months

期刊介绍： Thin Solid Films is an international journal which serves scientists and engineers working in the fields of thin-film synthesis, characterization, and applications. The field of thin films, which can be defined as the confluence of materials science, surface science, and applied physics, has become an identifiable unified discipline of scientific endeavor.