Flexible and porous polyimide/carbon nanotube triboelectric nanogenerator for efficient electromagnetic dissipation

IF 16.8 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2025-04-19 DOI:10.1016/j.nanoen.2025.111036

Shuangshuang Li , Mingyang Zhu , Yanjun Zhang , Mingzhen Xu , Wei Li , Siyuan Yang , Yezi Lu , Xinwei Tang , Wei Hong , Kangqi Chang , Zicheng Wang , Tianxi Liu

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Abstract

Nowadays, triboelectric nanogenerators have attracted considerable interest in a variety of applications. Nevertheless, it is still challenging to ascertain the impact of triboelectric generation on electromagnetic dissipation performance. Here, we report a compressible electromagnetic shielding single-electrode triboelectric nanogenerator (ES-TENG). It is composed of isocyanate-based polyimide/carbon nanotubes (PI/CNT) foam as positive electrodes and polytetrafluoroethylene (PTFE) as negative electrodes, respectively. The effective loading of carbon nanotubes facilitates the rational construction of conductive networks within PI/CNT foam, promoting the effective dissipation of incident electromagnetic waves. More importantly, the generated charge plays an essential role in interfacial polarization during triboelectric generation process, which enhances the electromagnetic shielding effectiveness from 17.2 dB to 26.5 dB in 12.4–18 GHz. The corresponding absorption (A) coefficient can be up to 0.9 in the most frequency of Ku and K bands. Such excellent electromagnetic characteristics make it possible for PI/CNT to exhibit a broad application prospect in the development of efficient absorption-dominated electromagnetic dissipation with sustainable energy harvesting.

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用于高效电磁消散的柔性多孔聚酰亚胺/碳纳米管三电纳米发电机

目前，摩擦电纳米发电机已经引起了广泛的应用。然而，确定摩擦发电对电磁耗散性能的影响仍然具有挑战性。在这里，我们报告了一种可压缩电磁屏蔽单电极摩擦电纳米发电机（ES-TENG）。它由异氰酸酯基聚酰亚胺/碳纳米管（PI/CNT）泡沫作为正极和聚四氟乙烯（PTFE）作为负极组成。碳纳米管的有效负载有助于在PI/CNT泡沫内合理构建导电网络，促进入射电磁波的有效耗散。更重要的是，摩擦电产生过程中产生的电荷对界面极化起着至关重要的作用，使电磁屏蔽效能在12.4-18 GHz范围内从17.2 dB提高到26.5 dB。在Ku和K波段的大部分频率，相应的吸收(A)系数可达0.9。这种优异的电磁特性使得PI/CNT在高效吸收主导的电磁耗散和可持续能量收集方面具有广阔的应用前景。

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来源期刊

Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

30.30

自引率

7.40%

发文量

1207

审稿时长

23 days

期刊介绍： Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.