Construction of cotton derived carbon fiber@FeNi nanoparticle/porous carbon sponge for boosting electromagnetic wave absorption

IF 11 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-06-30 DOI:10.1007/s12598-025-03429-1

Ying Li, Yu-Hao Lu, Zhen-Xin Liu, Dong-Yi Lei, Ming-Long Yang, Dong-Lei Yang, Yi-Han Jin, Jia-Xin Liu, Di Lan

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引用次数: 0

Abstract

Carbon-based sponge materials have attracted massive attention as electromagnetic wave (EMW) absorber candidates due to their lightweight and excellent electromagnetic (EM) attenuation capability. However, the high cost, complex fabrication process and limited EMW absorption bandwidth restrict their application. Herein, a hierarchical three-dimensional (3D) cotton derived carbon fibers coated with core–shell structure FeNi nanoparticle@porous carbon (CCF/FeNi@PC) from MOF precursor were successfully constructed by coprecipitation and one-step pyrolysis methods. By regulating carbonization temperature, optimizing the electromagnetic parameters, outstanding electromagnetic absorption (EMA) performance was achieved. The CCF@FeNi/PC synthesized at 900 °C demonstrates a −64.5 dB minimum reflection loss (RL_min) at 15.39 GHz, and the effective absorption bandwidth (EAB) is 5.08 GHz when the thickness is only 1.9 mm. Notably, the maximum EAB (EAB_max) was extended 8.18 GHz at 2.96 mm for FeNi-800. The excellent microwave absorption performance is attributed to the synergistic effect of enhanced dielectric loss and magnetic loss, good impedance matching as well as hierarchical multiple scattering and reflection of EMWs. The obtained CCF@FeNi/PC composites provide a novel and promising strategy for constructing lightweight low-cost efficient microwave absorption materials.

Graphical abstract

查看原文本刊更多论文

棉源碳fiber@FeNi纳米颗粒/多孔碳海绵增强电磁波吸收的构建

碳基海绵材料由于其轻量化和优异的电磁衰减能力，作为电磁波吸收材料的候选材料受到了广泛的关注。然而，高成本、复杂的制造工艺和有限的EMW吸收带宽限制了它们的应用。本文通过共沉淀法和一步热解法，成功构建了包覆MOF前驱体核壳结构FeNi nanoparticle@porous碳（CCF/FeNi@PC）的层叠三维（3D）棉基碳纤维。通过调节炭化温度，优化电磁参数，获得了优异的电磁吸收性能。在900℃下合成的CCF@FeNi/PC在15.39 GHz时的最小反射损耗（RLmin）为- 64.5 dB，当厚度仅为1.9 mm时，有效吸收带宽（EAB）为5.08 GHz。值得注意的是，FeNi-800的最大EAB （EABmax）在2.96 mm时延长了8.18 GHz。优异的微波吸收性能是由于增强的介质损耗和磁损耗的协同作用、良好的阻抗匹配以及emw的分层多重散射和反射。所得的CCF@FeNi/PC复合材料为构建轻量化、低成本、高效的微波吸收材料提供了一种新颖而有前途的策略。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.