Lightweight Co@MXene/Cellulose-Derived Carbon Aerogel for Electromagnetic Shielding and Absorption Capacity

IF 5.5 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Nano Materials Pub Date : 2025-09-24 DOI:10.1021/acsanm.5c03312

Lu Pei, , , Fang Ren*, , , Shengkui Yuan, , , Chunjie Li, , , Dandan Zhang, , , Yajie Liu, , , Jiale Zhang, , and , Penggang Ren*,

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Abstract

Developing low-density and high-efficiency electromagnetic shielding material with a high absorption coefficient is of great importance. In this work, we successfully prepared a nanostructured Co@MXene/cellulose-derived carbon aerogel via a simple solution mixing–regeneration, freeze-drying, and pyrolysis process. By regulating the concentration of Co²⁺, the degree of its dispersion in the cellulose-derived carbon aerogel can be flexibly adjusted to improve the electromagnetic shielding performance. Thanks to the synergistic effect of the porous structure and electric/magnetic coupling loss, the synthesized carbon aerogel exhibits an absorption coefficient of 0.65 and a high electromagnetic interference (EMI) shielding efficiency (SE) of 40.4 dB when the thickness is 2 mm, which achieve both a high SE and an absorption-based shielding mechanism. It provides an effective method for designing high-performance EMI shielding materials with low reflection and strong absorption properties.

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轻质Co@MXene/纤维素衍生的碳气凝胶电磁屏蔽和吸收能力

开发低密度、高效率、高吸收系数的电磁屏蔽材料具有重要意义。在这项工作中，我们通过简单的溶液混合再生、冷冻干燥和热解过程成功制备了纳米结构的Co@MXene/纤维素来源的碳气凝胶。通过调节Co2+的浓度，可以灵活调节Co2+在纤维素碳气凝胶中的分散程度，从而提高其电磁屏蔽性能。由于多孔结构和电/磁耦合损耗的协同作用，合成的碳气凝胶在厚度为2 mm时，吸收系数为0.65，电磁干扰屏蔽效率（SE）高达40.4 dB，既实现了高SE，又实现了基于吸收的屏蔽机制。为设计具有低反射、强吸收特性的高性能电磁干扰屏蔽材料提供了有效的方法。

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来源期刊

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.