Flexible Composite Carbon Films Prepared by a Pancake‐Making Method for Electromagnetic Interference Shielding

Yang, Minglong; Wei, Qiang; Li, Jianjun; Guo, Hongwei; Gao, Liya; Huang, Li; He, Xiaodong; Li, Yibin; Yuan, Ye

doi:10.1002/admi.201901815

Cited by 29 publications

(15 citation statements)

References 39 publications

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“…The effect was to glue the contiguous MXene nanoflakes and encourage the pressure fetch and boost the energy dissipation. [ 36 ]…”

Section: Resultsmentioning

confidence: 99%

“…The effect was to glue the contiguous MXene nanoflakes and encourage the pressure fetch and boost the energy dissipation. [36] In addition, other reported EMI shielding materials exhibited unsatisfactory mechanical properties for practical usage. For instance, the carbon nanotube/thermal plastic polyurethane film with an EMI shielding performance exhibited a low tensile strength of 11.5 MPa.…”

Section: Mechanical Propertymentioning

confidence: 99%

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Ultrathin and Mechanically Robust Mussel Byssus‐Inspired MXene@Aramid Nanofibers Materials with Superior Endurance in Harsh Environments for Tunable EMI Shielding Performance

Cheng

Liao

et al. 2022

Adv Materials Inter

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Reducing the fire hazards caused by high power electromagnetic (EM) waves and maintaining operational status of EM interference (EMI) shielding devices in harsh environments have caught increasing eyesight. In this paper, a series of promising EMI shielding materials with mussel byssus‐inspired structure are accomplished via an efficient vacuum‐assisted filtration approach. The flexible multilayered MXene@ANF nacres reveal superior mechanical property compared with both self‐supporting MXene film and MXene@ANF mixture film. Meanwhile, these nacres exhibit both exceeding and tunable EMI shielding effectiveness (EMI SE) of 40–60 dB in 8.2–12.4 GHz with a thickness of ≈20 µm and the absolute SE (SSEt) accomplishes 36641.94 dB·cm2 g−1. Besides, the exceeding thermal insulation of ANF offers the MXene nacres with an outstanding flame‐stopping capacity, and it can still block 99.99% EM waves after 2 min burning. Furthermore, MXene nacres perform superior endurance in harsh environment and retain EMI SE of 42 dB after the ultralow temperature damage. The EMI SE and fire safety of MXene@ANF with two typical structures, composite films and foam, are also systematically investigated. Therefore, this work is promising to fabricate tunable EMI shielding products with low fire hazards and high endurance in harsh environments.

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“…The effect was to glue the contiguous MXene nanoflakes and encourage the pressure fetch and boost the energy dissipation. [ 36 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Mechanical Propertymentioning

confidence: 99%

Ultrathin and Mechanically Robust Mussel Byssus‐Inspired MXene@Aramid Nanofibers Materials with Superior Endurance in Harsh Environments for Tunable EMI Shielding Performance

Cheng

Liao

et al. 2022

Adv Materials Inter

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“…Efficient, low weight, and low-cost EMI shielding materials are in great need. [16][17][18] One key issue that has inflicted the application of conductive nanofibrous materials is their low conductivities. Although the intrinsic material conductivity is crucial, the loose/weak physical interconnection between individual nanofibers is also With their low cost and unique physicochemical properties, conductive polymerbased film electrodes drew much attention in flexible electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Highly Crosslinked Conductive Polymer Nanofibrous Films for High‐Rate Solid‐State Supercapacitors and Electromagnetic Interference Shielding

Lai

Bai

Wang

et al. 2022

Adv Materials Inter

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With their low cost and unique physicochemical properties, conductive polymer‐ based film electrodes drew much attention in flexible electronic devices. However, their poor intrinsic conductivities limit their applications in high‐rate supercapacitors or high electromagnetic interference (EMI) shielding performance. It is meaningful to deal with the issue through the rational design of the film nanostructure. Herein, using specially treated PEDOT:PSS coated polyacrylonitrile (PAN) nanofibrous films (PPNFs) as a current collector, polyaniline (PANI) or polypyrrole (PPy) based highly crosslinked conductive nanofibrous films (HCC‐NFs), named as PANI@PPNF and PPy@PPNF, are fabricated. The PANI@PPNF electrodes exhibit a specific capacitance of 156 mF cm–2 at a current density of 1 mA cm–2. Meanwhile, 41% capacity (64 mF cm–2) remained even at 20 mA cm–2. The remarkable rate performance of PANI@PPNFs demonstrates the HCC‐NF structure brings a high‐rate character for pseudocapacitive material. Furthermore, the solid‐state supercapacitor shows long‐term cycle stability at a high scan rate of 1 V s–1 for 5 000 cycles and over 75% of the specific capacitance is retained, suggesting excellent cycle stability of PANI@PPNF. Besides, PANI or PPy based HCC‐NFs show high performance in EMI shielding. This conductive polymer‐based HCC‐NF structure offers a promising platform for designing multi‐functional flexible electronic devices.

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“…Therefore, the use of these materials is not suitable for EMI shielding of wide-range GHz level electronic devices. In contrast, the reflective EMI shielding method that utilizes the conductive properties of materials can be applied to wide-range EMI shielding (including the GHz region) by efficient designing of the composition and structure of various conductive materials (structural diversification such as porous bodies − and nano- or microstructures − and diversification of material composition such as composites − ).…”

Section: Introductionmentioning

confidence: 99%

Transparent and Flexible Electromagnetic Interference Shielding Film Using ITO Nanobranches by Internal Scattering

Kim

Hyeong

Choi

et al. 2021

ACS Appl. Mater. Interfaces

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A transparent and flexible film capable of shielding electromagnetic waves over a wide range of frequencies (X and K u bands, 8−18 GHz) is prepared. The electromagnetic wave shielding film is fabricated using the excellent transmittance, electrical conductivity, and thermal stability of indium tin oxide (ITO), a representative transparent conductive oxide. The inherent mechanical brittleness of oxide ceramics is overcome by adopting a nanobranched structure. In addition, mechanical stability is maintained even after repeated bending experiments (200 000 times). The produced transparent and flexible shielding film is applied to practical GHz devices (Wi-Fi and LTE devices), and signal sensitivity is confirmed to decrease. Therefore, it can be widely applied to various transparent and flexible electronic devices.

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Flexible Composite Carbon Films Prepared by a Pancake‐Making Method for Electromagnetic Interference Shielding

Cited by 29 publications

References 39 publications

Ultrathin and Mechanically Robust Mussel Byssus‐Inspired MXene@Aramid Nanofibers Materials with Superior Endurance in Harsh Environments for Tunable EMI Shielding Performance

Ultrathin and Mechanically Robust Mussel Byssus‐Inspired MXene@Aramid Nanofibers Materials with Superior Endurance in Harsh Environments for Tunable EMI Shielding Performance

Highly Crosslinked Conductive Polymer Nanofibrous Films for High‐Rate Solid‐State Supercapacitors and Electromagnetic Interference Shielding

Transparent and Flexible Electromagnetic Interference Shielding Film Using ITO Nanobranches by Internal Scattering

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