Superelastic Graphene‐Based Composite Aerogel for Thermal and Electromagnetic Protection in Extreme Temperature Environments DOI

Junwei Yue,

Mengmeng Qin, Huitao Yu

et al.

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

Published: May 2, 2025

Abstract The aerogel materials stacked with nanomaterials usually have good thermal insulation and electromagnetic wave (EMW) absorption properties due to their porous properties. However, consecutive mechanical loading cycles under extreme temperature environments cause irreversible structural damage. Furthermore, there is an inherent contradiction between the characteristics of multiple interfaces anti‐fatigue performance. In this study, polyimide (PI) fibers are dispersed in graphene aerogel, composite (G‐PI@F 20 /CNT x ) can be formed by situ welding. hierarchical structure endows excellent superelasticity, insulation, EMW endures 90% strain compression over a range −196 160 °C, deformation loss remaining below 5%. This hinders phonon conduction, resulting low conductivity (0.0313 W m −1 K ). thickness 4.1 mm achieves effective bandwidth (EAB) 12.48 GHz. By increasing 20.3 mm, ultra‐broadband 15.24 GHz optimal reflection (RL min −43.49 dB attained. These findings provide crucial insights into design multifunctional absorbing offer general strategy for synthesizing superelastic aerogels.

Language: Английский

Integrating nitrogen doping with multi-heterogeneous interfaces of NRGO/ZnFe2O4@PPy composite aerogels for efficient and wideband electromagnetic wave absorption DOI
Guan Yang, Ruiwen Shu, Baohua Liu

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159819 - 159819

Published: Jan. 1, 2025

Language: Английский

Citations

7
High-performance MOF-based electromagnetic wave absorption materials: design and performance optimization DOI
Xiaoxuan Fan,

Zhan-Zhan Wang,

X. T. Zhang

et al.

Materials Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Electromagnetic wave absorbing material (EMWAM) based on metal-organic framework (MOF) has high loss capacity and wide absorption bandwidth. This paper reviews recent research MOF-based EMWAM outlines current challenges future directions.

Language: Английский

Citations

3
Activated Graphite with Richly Oxygenated Surface from Spent Lithium‐Ion Batteries for Microwave Absorption DOI Open Access
Fangyu Zheng, Peikun Wu, Lizhi Wang

et al.

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

Published: Jan. 16, 2025

Designing spent graphite anodes from lithium-ion batteries (LIBs) for applications beyond regenerated offers significant potential promoting the recycling of LIBs. The battery-grade graphite, characterized by a highly graphitized structure, demonstrates excellent conductive loss capabilities, making it suitable microwave absorption. During Li-ion intercalation and deintercalation processes in battery operation, surface layer (SG) becomes activated, forming oxygen-rich functional groups that enhance polarization mechanism. To further control achieve optimized impedance matching, reduced graphene oxide (rGO) is employed as modifier. Herein, rGO serves binder, effectively combining individual SG particles. matched Fermi levels reduce interfacial barrier, facilitating rapid electron transfer. Simultaneously, their combination forms 3D conduction network, which not only enhances multiple scattering, reflection, attenuation electromagnetic waves but also provides abundant centers increased As result, SG/rGO aerogel achieves an impressive effective absorption bandwidth 7.04 GHz accompanied minimum reflection -51.1 dB. This study broadens scope LIBs utilization insights wilder more applications.

Language: Английский

Citations

2
A Pomegranate‐Like Nanolayer Featuring A Core‐Shell Architectural Design for Thermal‐Mechanical‐Electromagnetic Responses and Sensor DOI
Xiaoxuan Fan, Min Zhang,

X.T. Zhang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 12, 2024

Abstract Multifunctional electromagnetic wave (EMW) absorbing materials are attracting attention because of their potential applications in medical, livelihood, and military. In this study, a pomegranate‐like nanolayer featuring core‐shell architecture (PNCS) is prepared using confinement strategy. Introducing metal atoms into unique design (M‐PNCS, M = Mn, Fe, Co, Ni, Cu) effectively tuned the response improved functions. The Mn‐PNCS composite exhibited highest absorption. Its reflection loss ( RL ) reached −62.39 dB with an effective absorption bandwidth (EAB) at 1.8 mm 6.0 GHz. As charge transport capacity increases, its can be transformed shielding, green shielding index up to 3.54. On basis, used fabricate multifunctional film new strain sensor. This integrated absorption, thermal insulation, hydrophobicity, flexibility, sensing, thus showing for use wearable protective clothing. addition, sensors simulation achieved sensing through coupling effect between patterns. These findings demonstrate that excellent material technical fields EMW devices.

Language: Английский

Citations

10
Photo-thermally controlled Cu nanoparticles density in SWCNT/Cu nanocomposites-based flexible EMI shielding electrodes DOI
Jae‐Won Lee,

Juhee Kim,

Min Su Kim

et al.

Journal of Materials Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

In this study, single-walled carbon nanotube (SWCNT)/Cu nanocomposites were systematically synthesized from oxidized SWCNTs and Cu formate via photothermal heating.

Language: Английский

Citations

0
Cross-Linked Polyurethane/Bimetallic MOF-Derived Composites with Electromagnetic Wave-Absorbing, Self-Healing, and Recyclable Capabilities DOI
Xiaoran Liu, Zhiqiang Wang, Weiwei Men

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 25, 2025

Language: Английский

Citations

0
Carbon Nanocoils‐Assisted Formation of Tunable Pore Graphene Aerogels for Lightweight Broadband Microwave Absorption, Thermal Insulation, and Antifreeze Devices DOI Open Access
Yuan Guo, Yuping Duan,

Shude Gu

et al.

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

Published: Feb. 9, 2025

The rational design of the aerogel pore structure facilitates maximum excitation materials physicochemical properties, which enables modulation their electromagnetic performance. However, controllable adjustment remains a significant challenge. Here, freeze-thawing process and thermal annealing treatment are introduced to prepare reduced graphene oxide (rGO)/iron (Fe)/carbon nanocoil (CNC) aerogels. composite aerogels with tunable obtained by adjusting content CNC. Both experiments simulations confirm that addition CNC presents continuous 3D conductive network, improves conductivity loss polarization loss. Meanwhile, amorphous carbon within causes structural defects, further enhance Therefore, rGO/Fe/CNC optimized has lightweight efficient wave absorption. At an ultra-low filling ratio 0.8 wt%, effective absorption bandwidth reaches 7.9 GHz optimal reflection is -43.5 dB. In addition, due network interwoven temperature stability nanomaterials, have excellent insulation, antifreeze performance, hydrophobicity. This multifunctional absorber great potential for application in complex changing environments.

Language: Английский

Citations

0
Modulating Electromagnetic Genes Through Bi-Phase High-Entropy Engineering Toward Temperature-Stable Ultra-Broadband Megahertz Electromagnetic Wave Absorption DOI Creative Commons
Xiaoji Liu, Yuping Duan, Nan Wu

et al.

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Feb. 25, 2025

Abstract Magnetic absorbers with high permeability have significant advantages in low-frequency and broadband electromagnetic wave (EMW) absorption. However, the insufficient magnetic loss inherent conductivity of existing limit further expansion EMW absorption bandwidth. Herein, spinel (FeCoNiCrCu) 3 O 4 high-entropy oxides (HEO) are successfully constructed on surface FeCoNiCr 0.4 Cu 0.2 alloys (HEA) through low-temperature oxygen bath treatment. On one hand, HEO HEA different magnetocrystalline anisotropies, which is conducive to achieving continuous natural resonance improve loss. other low can serve as an impedance matching layer, magneto-electric co-modulation. When thickness 5 mm, minimum reflection (RL) value bandwidth (RL < − dB) bi-phase composites (BPHEC) reach 12.8 dB 633 MHz, respectively. The RCS reduction multilayer sample gradient characteristic 18.34 m 2 . In addition, BPHEC also exhibits temperature-stable performance, Curie temperature, oxidation resistance. maintains between 593 691 MHz from 50 150 °C. This work offers a new tunable strategy toward modulating genes for ultra-broadband megahertz

Language: Английский

Citations

0
Superelastic Graphene‐Based Composite Aerogel for Thermal and Electromagnetic Protection in Extreme Temperature Environments DOI

Junwei Yue,

Mengmeng Qin, Huitao Yu

et al.

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

Published: May 2, 2025

Abstract The aerogel materials stacked with nanomaterials usually have good thermal insulation and electromagnetic wave (EMW) absorption properties due to their porous properties. However, consecutive mechanical loading cycles under extreme temperature environments cause irreversible structural damage. Furthermore, there is an inherent contradiction between the characteristics of multiple interfaces anti‐fatigue performance. In this study, polyimide (PI) fibers are dispersed in graphene aerogel, composite (G‐PI@F 20 /CNT x ) can be formed by situ welding. hierarchical structure endows excellent superelasticity, insulation, EMW endures 90% strain compression over a range −196 160 °C, deformation loss remaining below 5%. This hinders phonon conduction, resulting low conductivity (0.0313 W m −1 K ). thickness 4.1 mm achieves effective bandwidth (EAB) 12.48 GHz. By increasing 20.3 mm, ultra‐broadband 15.24 GHz optimal reflection (RL min −43.49 dB attained. These findings provide crucial insights into design multifunctional absorbing offer general strategy for synthesizing superelastic aerogels.

Language: Английский

Citations

0