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Issue 47, 2019
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Buckled AgNW/MXene hybrid hierarchical sponges for high-performance electromagnetic interference shielding

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Abstract

The development of electromagnetic interference (EMI) shielding materials is moving forward towards being lightweight and showing high-performance. Here, we report on lightweight silver nanowire (AgNW)/MXene hybrid sponges featuring hierarchical structures that are fabricated by a combination of dip-coating and unidirectional freeze-drying methods. The commercial melamine formaldehyde sponges (MF), designed with a buckled structure, are chosen as the template for coating with the AgNW layer (BMF/AgNW). Furthermore, the additional irregular honeycomb architecture composed of MXene assembled cell walls is introduced inside the BMF cell–matrix through unidirectional freeze-drying of MXene aqueous suspensions. Consequently, the BMF/AgNW presents a better EMI shielding effectiveness of 40.0 dB contributed by the conductive network and multiple reflections and scattering compared with the MF/AgNW. Eventually, the resulting AgNW/MXene hybrid sponge exhibits a higher EMI shielding effectiveness of 52.6 dB with a low density of 49.5 mg cm−3 compared with the BMF/AgNW due to synergetic effects of the AgNW and MXene both in conductivity and hierarchical structure. These results also provide a novel way to fabricate lightweight and conductive sponges as high-performance EMI shielding materials.

Graphical abstract: Buckled AgNW/MXene hybrid hierarchical sponges for high-performance electromagnetic interference shielding

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Publication details

The article was received on 17 Sep 2019, accepted on 28 Oct 2019 and first published on 29 Oct 2019


Article type: Paper
DOI: 10.1039/C9NR07988B
Nanoscale, 2019,11, 22804-22812

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    Buckled AgNW/MXene hybrid hierarchical sponges for high-performance electromagnetic interference shielding

    C. Weng, G. Wang, Z. Dai, Y. Pei, L. Liu and Z. Zhang, Nanoscale, 2019, 11, 22804
    DOI: 10.1039/C9NR07988B

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