Controlled Fabrication of Ramie Plant Derived Magnetic Helical/Chiral Porous Carbon Fibers (Ni@CNTs@HPCFs) for Highly Efficient Microwave Absorption Performance and EAB across a Broad Temperature Range

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(44), P. 18916 - 18930

Published: Oct. 24, 2024

Herein, we report a sustainable catalytic self-deposition (CSD) synthesis approach to fabricate 1D ultralightweight magnetic CNT helical/chiral porous carbon fibers (Nix@CNTs@HPCFt's) that exhibit tremendous absorption performance over broad range of temperature (700–800 °C) and contents (1.00–2.00 mmol). The synergistic impact in situ dipping the CSD enables regulation morphology density by encapsulating Ni nanocatalysts. Nix@CNTs@HPCFt's unprecedentedly splendid capabilities spectrum microwave (4.00–18.00 GHz) with efficient bandwidth (EAB, RL ≤ −10 dB) 2.00–4.50 mm thickness. Moreover, unprecedented refer their sophisticated structure, ultralow density, large specific surface area, CNTs, interface polarization, cross-polarization, dielectric loss integration 0D/1D components, loss, well-matched impedance. Notably, Ni1.00@CNTs@HPCF700 at 11.92 GHz 2.41 matching thickness exhibits an astronomical −45.20 dB EAB 10.40–18.00 (7.60 covering 40% X band entire band. improves 8.00 (10.00–18.00 50% whole Ku 2.30 mm. Meanwhile, Ni1.50@CNTs@HPCF800 just 4.10 8.24 gained −64.40 4.32 (6.80–11.12 30% C 78% This study opens new doors for development absorbers produced carbonization comparable performance.

Language: Английский

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Ultrathin moiré pattern interlayered metamaterials for broadband and wide-frequency range tunable microwave absorption

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 178695 - 178695

Published: Jan. 1, 2025

Language: Английский

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A New Type Microwave Absorption Materials: Metal–Organic‐Frameworks (MOFs) Used as Non‐Conductive Material Combination with P‐C‐800

Advanced Electronic Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 8, 2025

Abstract Metal–Organic‐Frameworks (MOFs) are commonly used as microwave‐absorbing materials after pyrolysis treatment. Rare researchers treat MOFs non‐conductive and use them absorbing directly. In this paper, MOFs@P‐C‐800 composite prepared adopt to hydrothermal ultrasonic dispersion methods by regulating the morphological characteristics of content P‐C‐800. As for Co‐BDC‐P‐C‐800, maximum reflection loss reaches −18.4 dB at 14.29 GHz effective absorption bandwidth (EAB) achieves 3.87 from 13.5 17.37 GHz. After contents P‐C‐800 is adjusted, Co‐BDC‐P‐C‐800 (0.05 g) exhibited excellent microwave performance, RL value −60 13 with a thickness 2.0 mm, EAB 5.91 12.02 17.93 This paper not only provides new application direction MOFs, but also offers promising research development materials.

Language: Английский

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Multidimensional Fe3O4@CoNi-CNTs Composite: Synergizing High-Dielectricity and High-Permeability for Enhanced Electromagnetic Wave Absorption

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Theoretical Model of the Island Effect in Flexible Electronics under Equal Biaxial Stretching

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Island‐bridge architecture represents a widely used structural design strategy in the field of stretchable inorganic electronics, where flexible serpentine interconnects function as bridges to accommodate most deformation, while islands residing functional devices exhibit minimal deformation. The mismatch Young's modulus between elastic substrate and rigid usually leads stress concentration, which is named island effect. This phenomenon can significantly increase risk interfacial damage, such debonding tearing failure near island. In this work, mechanical model effect under equal biaxial stretching developed based on theoretical analysis, simulation, experimental measurement. scaling law displacement strain distributions surface illustrates that ratio radius length main controlling parameter effect, proved by numerical results. criterion distinguishing whether problem axisymmetric derived from this. Further, deformation periodic array structure predicted model, demonstrating its potential for application electronic devices.

Language: Английский

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Mechanistic Insights into the Structural Evolution of ZIF‐67 via Electrospinning Strategy Toward High Electromagnetic Wave Absorption Performance of ZIF‐67‐Derived Carbon Nanofibers

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Metal‐organic framework (MOF)‐derived architectures are regarded as an effective electromagnetic wave (EMW)‐absorbing materials owing to their adjustable compositions and microstructures. The combination of MOFs with carbon nanofibers (CNFs) is a practical method increase the EMW absorption ability. In this work, cobalt‐based zeolitic imidazolate framework‐67 (ZIF‐67) serves self‐sacrificing precursor fabricate Co‐carbon nanofiber (Co‐CNF) composites via in situ electrospinning strategy. Comparative studies on ex situ, strategies for conducted. A unique structural evolution mechanism from ZIF‐67 Co nanoparticles explored. Numerous small evenly distributed surface synthesized Co‐CNF (in‐Co‐CNF) resulting collapse framework, whereas remains (ex‐Co‐CNF), encapsulating large nanoparticles. lower reflection loss ( RL ) −48.6 dB at 6.8 GHz 3.5 mm achieved in‐Co‐CNF because improved conduction, polarization, magnetic losses, ex‐Co‐CNF only exhibits −18.3 9.3 same thickness. radar cross‐section (RCS) simulation Tesla wireless transmission experiment conducted validate real applications.

Language: Английский

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Controlled Synthesis of HPCFs@FeCoNi@NC from Biomass Fiber with Excellent Electromagnetic Wave Absorption Properties Over a Broad Spectrum EAB and Magnetic Contents

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Language: Английский

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Flexible CoNiZn@Ti3CNTx MXene@carbon fabrics with hierarchical structure for efficient electromagnetic wave absorption

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 500, P. 157444 - 157444

Published: Nov. 1, 2024

Language: Английский

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Multidimensional, Superflexible, and Binder-free CNT-rGO/Si Buckypaper as Anodes for Lithium-Ion Batteries and Electrochemical Performance

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(20), P. 9194 - 9206

Published: Oct. 9, 2024

It is a challenge to prepare self-supporting electrodes with superflexibility and excellent electrochemical properties for lithium-ion batteries (LIBs) using simple method. The utilization of Si in LIB anodes widespread due its high specific capacity. However, the significant volume expansion during charge–discharge cycles hinders large-scale application, Si–carbon are mostly powder form. Herein, low-cost method synthesizing superflexible via ultrasonic self-assembly, followed by directional pressure filtration technology, proposed. Ultrasonic self-assembly was realized formation homogeneous stable suspension Si, carbon nanotubes (CNTs), reduced graphene oxide (rGO), which technique, leading binder-free, self-supported, buckypaper (BP). For BP, CNTs were inserted into exfoliated rGO nanosheets avoid restacking agglomeration, while micro- nanoparticles uniformly filled between nanosheets, forming three-dimensional network structure. skeleton not only provided cushioning support changes but also multiple conductive pathways. BP 50 nm (CNT-rGO/Si-0.05) had residual capacity 540 mAh/g after 200 at 820 mA/g, 91% that fourth cycle. Its structure almost no damage 1500 successive 180° bending-straightening.

Language: Английский

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Carbon nanotubes decorated NiCo/C composite anchored on graphene oxide as broadband microwave absorber

Diamond and Related Materials, Journal Year: 2024, Volume and Issue: unknown, P. 111733 - 111733

Published: Oct. 1, 2024

Language: Английский

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