High-performance Electromagnetic Wave Research Articles

Polyimide-based porous carbon and cobalt nanoparticle composites as high-performance electromagnetic wave absorbers.

This study successfully utilized a straightforward approach, choosing liquid-liquid phase separation to build a porous structure and synthesize composite absorbers based on polyimide-based porous carbon and cobalt nanoparticles (designated as PPC/Co-700 and PPC/Co-800). A fine porous structure was achieved as a result of the excellent heat resistance of polyimide resulting in an excellent electromagnetic wave absorption ability of PPC/Co composites. The results obtained clearly indicated that PPC/Co-700 and PPC/Co-800 exhibit a porous structure with coral-like pores, enhancing both impedance matching properties and microwave attenuation abilities. This improvement in impedance matching conditions and dissipation capability is attributed to the synergistic effect of dielectric loss induced by carbon and magnetic loss induced by Co nanoparticles. PPC/Co-700 showed the strongest absorption performance with a minimum reflection loss of -59.85 dB (30 wt% loading, thickness of 3.42 mm) and an effective absorption bandwidth (EABW, RL ≤ -10 dB) of 6.24 GHz (30 wt% loading, thickness of 2.78 mm). Therefore, this work provides a facile strategy for the development of a promising absorbing material with outstanding electromagnetic wave absorption performance.

Regulating the vacancies of nitrogen-doped carbon nanohorns for high-performance electromagnetic wave absorption.

Single-walled carbon nanohorns (SWCNHs), which are sealed on one side with a conical cap and can self-aggregate, are aggregates with spherical morphology ranging from 30 to 100 nm and include dahlia, bud, and seed structures. These SWCNHs are suitable for electromagnetic wave absorption (EMWA) due to their conductivity loss. However, conductivity loss, which is part of three primary loss mechanisms, leads to SWCNHs suffering from impedance mismatching and a narrow effective absorption bandwidth (EAB). In this work, the content of vacancy-type defects in "dahlia-like" nitrogen-doped single-walled carbon nanohorns (NSWCNHs) is regulated by dielectric barrier discharge (DBD) plasma with argon to adjust their polarization and impedance matching. The high-energy argon ions from the plasma impact the bonds between the carbon atoms and adsorbed oxygen, leading to the sputtering of oxygen atoms from the surface and resulting in an increase in surface disorder and defect content. Vacancy-type defects improved polarization loss and optimized impedance matching, leading to the satisfactory EMWA performance of NSWCNHs. The NSWCNHs exhibit an outstanding minimum reflection loss (RLmin) of -57.94 dB when subjected to argon DBD treatment for 5 minutes, achieving this remarkable result at a thickness of 1.9 mm. Additionally, the effective absorption bandwidth (EAB) can cover 4.78 GHz after a treatment period of 1 minute. These results suggest that NSWCNHs have great potential as high-efficiency EMWA materials and demonstrate a new approach for designing high-performance EMWA absorbers.

Facile fabrication of NiFe2O4-FeNi/C heterointerface composites with balanced magnetic-dielectric loss for boosting electromagnetic wave absorption

In the electronic information age, and even in the impending “intelligent era”, electromagnetic wave (EMW) absorbers have inevitably received more and more attention. However, their practical applications are currently limited by a lack of suitable mass-production strategies for high performance EMW absorbers. Herein, we propose a facile strategy for large-scale and controllable preparation of NiFe2O4-FeNi/C (NFO-FN/C) composites with various microstructural features advantageous to enhanced EMW absorption, including core-shell structure, porous structure, hierarchical nano-micro topography, and electromagnetic heterointerfaces. The composites are synthesized through the confinement pyrolysis of the polydopamine (PDA)-coated NiFe2O4 (NFO), and their microstructural features can be facilely tailored by changing the number of PDA confinement. The synthesized composite of NFO-FN/C-2 performs best after two repetitions of PDA confinement throughout the preparation process, with a reflection loss (RLmin) of −68.74 dB at a thickness of 1.61 mm and a broad effective absorption of 6.37 GHz at a thickness of 1.9 mm. This impressive EMW absorption performance is attributed to the synergistic effect of multiple loss mechanisms and excellent impedance matching derived from the tailored microstructural features of our EMW absorbers. This work provides a new perspective on the large-scale preparation of highly efficient EMW absorbing materials.

Synthesis of SiC nanowires wrapped in trimetallic layered double hydroxide nanosheets with core-shell structure via self-assembly growth approach for effective electromagnetic wave absorption

The optimization of microstructure and composition is an important strategy to obtain high-performance electromagnetic wave absorption (EMA) materials. In this study, several fungus-like two-dimensional (2D) trimetallic layered double hydroxide (LDH) nanosheets have been synthesized with tunable metallic ions of Ni2+, Co2+, and Zn2+ by using a compositional genetic strategy from MOF. Thereafter, a series of core-shell composites have been fabricated at room temperature by the self-assembly growth approach, constructed from 2D trimetallic LDH nanosheets wrapped on 1D SiC nanowires. The composition and structure of the samples can be preserved by varying the Co and Zn ratios. The EMA materials were prepared by performing a thermal treatment approach in the air atmosphere based on the synthesized composites described above. A reasonable integration of dielectric and magnetic components and an opportune core-shell structure provide better impedance matching, multiple reflections and scattering, polarization loss, enhancing conduction loss, and magnetic loss. The results show that NiCo2Zn1-LC@SiC exhibits superior EMA performance with the minimum reflection loss (RLmin) of −44.73 dB at a thickness of 1.86 mm and the maximum effective absorption band (EABmax) of 6.12 GHz at 2.12 mm. This work proves the influence of the structure and composition on absorbers and provides ideas for the design and development of high-performance EMA materials in a facile approach.

Multi-scale heterostructures of MXene-based composites for adjustable electromagnetic wave absorption

Nowadays, electromagnetic pollution caused by the development of communication technology and electronic equipment has become an urgent problem to be solved. It is an effective solution to design high-performance electromagnetic wave absorption (EWA) materials with wide-band and powerful absorption characteristics for electromagnetic protection. In this work, a multi-scale MXene/carbon nanotube@Fe3O4 composite material with a heterogeneous structure was synthesized by a solvothermal method, and the high/low-frequency EWA operating bands were adjusted by component regulation. The composite material performed excellent EWA performances based on the synergistic effect of polarization loss, conductive and magnetic loss, and three-dimensional heterointerfaces. Its minimum reflection loss reached − 59.95 dB with an effective absorption bandwidth of 4.7 GHz (13.3–18 GHz), which basically covered the Ku band. Therefore, this feasible scheme is expected to provide an effective strategy for controlling military and civil electromagnetic pollution.

Controllable heterogeneous interfaces and dielectric modulation of biomass-derived nanosheet metal-sulfide complexes for high-performance electromagnetic wave absorption

Constructing new environmentally friendly dielectric coupling models is an effective strategy for designing high-performance wave absorbers. However, biomass carbon materials with high potential energy and a lack of magnetic response mechanism do not fulfill the requirements. In this work, the effects of different pyrolysis temperatures and the introduction of different metal sulfides on the microscopic morphology and dielectric-magnetic properties of the composites were investigated. Among them, K element detected in the biomass effectively modulates the conduction loss. The minimum reflection loss (RLmin) of –62.42 dB at 1.8 mm and the maximum effective absorption bandwidth (EABmax) of –62.42 dB at 1.9 mm were obtained due to the non-uniform interfacial-induced polarization of the metal-sulfide nanosheets and the scattering of the electromagnetic waves (EW) by the “island” microstructures. This study provides a powerful reference for the modification and application of biomass materials.

In Situ Fabrication of Heterogeneous Co/Nanoporous Carbon Nano-Islands for Excellent Electromagnetic Wave Absorption.

High-performance electromagnetic wave (EMW) absorbers are essential for addressing electromagnetic pollution and military security. However, challenges remain in realizing cost-effectiveness and modulating absorbing properties. In this study, heterogeneous Co/nanoporous carbon (NPC) nano-islands are prepared by efficient method co-precipitation combined with in situ pyrolysis. The multi-regulation strategy of morphology, graphitization, and defect density is achieved by modulating the pyrolysis temperature. Adjusting the pyrolysis temperature can effectively balance the conductivity and defect density, optimizing the impedance matching and enhancing the attenuation. Furthermore, it facilitates obtaining the appropriate shape and size of Co magnetic nanoparticles (Co-MNPs), triggering strong surface plasmon resonance. This resonance, in turn, bolsters the synergy of dielectric and magnetic loss. The incorporation of porous nanostructures not only optimizes impedance matching and enhances multiple reflections but also improves interfacial polarization. Additionally, the presence of enriched defects and heteroatom doping significantly enhances dipole polarization. Notably, the absorber exhibits an impressive minimum reflection loss (RLmin) of -73.87dB and a maximum effective absorption bandwidth (EABmax) of 6.64GHz. The combination of efficient fabrication methods, a performance regulation strategy through pyrolysis temperature modulation, and radar cross section (RCS) simulation provides a high-performance EMW absorber and can pave the way for large-scale applications.

Bayberry-like bimetallic CoNi-MOF-74 derivatives/MXene hybrids with abundant heterointerfaces toward high-efficiency electromagnetic wave absorption

The flourishing development of electronic devices and radar detection technologies necessitates the urgent creation of high-efficiency electromagnetic wave (EMW) absorption materials with expansive absorption bandwidths. Although MXene has garnered significant interest in the domain of EMW absorption due to its tunable dielectric properties and structural designability, its high permittivity often results in poor impedance matching and a single loss mechanism, which makes it difficult to realize optimal EMW absorption capabilities. In this work, CoNi bimetallic metal–organic frameworks (MOFs) derived bayberry-like magnetic porous carbon (CoNiMPC)@carbon nanotubes (CNTs)/MXene (CNCM) hybrids were initially synthesized via simple solution precipitation, thermal treatment, and electrostatic self-assembly strategy. As anticipated, excellent EMW absorption characteristics were achieved by adjusting the ratio of CoNiMPC@CNTs and MXene. Multi-heterointerfaces consisting of zero-dimensional porous carbon, one-dimensional carbon nanotubes, and two-dimensional (2D) MXene, electrical/magnetic coupling effects, and polarization loss induced by abundant heterointerfaces endow the prepared CNCM hybrids with high-performance EMW absorption. Notably, the CNCM-7 hybrid material exhibits a minimum reflection loss (RLmin) of − 65.3 dB at 6.8 GHz with a mere 2.7 mm thickness and an effective absorption bandwidth (EAB, RL < −10 dB) of 5.0 GHz at a thickness of 1.27 mm. This study proposes a unique viewpoint and approach towards the design and preparing high-performance MXene-based EMW absorption materials.

“Appropriate dressing” non-fluorination strategy: Dopamine coating CuSiF6 framework derived F-rich SiC/CuF2@C electromagnetic wave absorber

For enhancing the electromagnetic wave (EMW) absorbing performance of SiC-based composites, constructing multiple interface polarization and defects through doping highly electronegative fluoride (F) is of great significance. However, integrating F constituent into SiC composites using presently available fabrication techniques of fluorination with high-temperature sintering really remains a challenge due to the pronounced temperature sensitivity and the chemical activity of fluoride. Herein, we present a facile one-step “non-chemical fluorination” strategy on a PDA-coated CuSiF6 framework with optimal “chemical dressing”, which generated a high-performance EMW absorber (denoted as SiC/CuF2@C-5) with intense reflection loss (RLmin) of −42.74 dB and broad effective absorption bandwidth (EAB) of 5.6 GHz (9.12–14.72 GHz). The proper PDA-coated on CuSiF6in situ induced the uniform distribution of SiC and doping of electronegative F-sites in the carbon matrix, eliminating the extra fluorination procedure and preventing the gasification of fluoride. Moreover, generated abundant hetero-interfaces, and the enriched defects regulated polarization loss and impedance matching. This work presents a promising synthesis strategy for high-performance SiC-based EMW absorbing material.

High-performance electromagnetic wave absorption of nitrogen carbon doped composite materials with vanadium based nanowire structure at 2–18 GHz

With the popularization of electronic devices, the interference of electromagnetic waves on people is more and more serious, and the development of excellent EMWA materials has become increasingly urgent. In this paper, carbon and nitrogen-loaded wheat ear shaped nanocomposites (V2O3/Zn)@C were prepared by in-situ polymerization and high-temperature calcination using ZnVO nanowires as the substrate and divinylbenzene and acrylonitrile as the loading materials. The polymeric carbon microspheres were infiltrated into the ZnVO nanowires after high-temperature carbonization, forming a wheat ear shape core-shell structure. The EMWA performance of (V2O3/Zn)@C composites was optimized by adjusting the ratio between the loaded feedstock and ZnVO nanowires. The EMWA results show that (V2O3/Zn)@C exhibits excellent EMWA performance at low thickness, with an RLmin of −56.5 dB and a EABmax of 5.25 GHz. This paper provides new insights into advanced electromagnetic wave absorbing materials through special structural designs.

Ambient synthesis of one-dimensional core-shell nanocomposites by encapsulating SiC nanowires with layered double hydroxide nanosheets for high-performance microwave absorption application

The optimization design of micro/nanostructure and composition is an effective strategy for preparing high-performance electromagnetic wave absorption (EMA) material. Here, we provide a single-step in-situ electrostatic self-assembly growth approach at room temperature for the efficient construction of core-shell structural composites, consisting of bimetallic layered double hydroxides (LDH) nanosheets tightly wrapped around SiC nanowires. The formation of the bimetallic LDH nanosheets shell is caused by the binding of the bimetallic cations to OH−, which mainly arises from the hydrolysis of water induced by the 2-methylimidazole molecule, while the protonated 2-methylimidazole acts as an interlayer equilibrium anion. Through a heat-treatment process under air, the resulting derivatives of Co, Ni-LMc@SiC, and Zn, Ni-LMc@SiC generate excellent EMA properties due to the intrinsic and synergistic properties of the dielectric/magnetic components and the core-shell structure that provides numerous physical contacts and endows the composite with enhanced interfacial polarization and electron transport. As a result, Zn, Ni-LMc@SiC displays the highest RLmin value of −55.59 dB at 2.8 mm and EABmax of 6.28 at 2.4 mm, while Co, Ni-LMc@SiC has the widest EAB of 6.32 GHz at a thinner thickness of 2.2 mm. The successful construction of core-shell structures for LDH and SiC nanowires in such a facile strategy will broaden the application and development of high-performance EMA materials.

Hafnium boride whiskers prepared by boro/carbothermal reduction for high-performance electromagnetic wave absorption

In this study, a chloride-assisted boro/carbothermal reduction method was employed to prepare HfB2 whiskers, aiming to address the challenges associated with large-scale preparation of HfB2 whiskers and the development of high-temperature resistant electromagnetic wave absorbing materials. When the precursors were mechanically stirred, the resulting mixture underwent calcination at 1450 °C for 3 h, leading to the formation of single-phase HfB2 whiskers. The as-synthesized HfB2 whiskers showed exceptional resistance to oxidation at temperatures up to 700 °C. The microwave absorption performance and mechanism of the HfB2 whiskers/paraffin composite were also investigated. The results revealed that the composite achieved a minimum reflection loss of −41.29 dB when the HfB2 whiskers content reached 80 wt%, while the widest effective absorption bandwidth of the composite reached 3.6 GHz when the HfB2 whiskers content increased to 82.5 wt%. This work presents a novel candidate for high-temperature resistant materials used in absorbing electromagnetic wave.

Tailoring electromagnetic wave absorption using in-situ precipitation of BaTiO3–BaFe12O19 glass ceramic

Utilizing a BaO–TiO2–B2O3–Na2O–SiO2–Al2O3–Fe2O3 multicomponent glass system, this study achieves in-situ precipitation of BaTiO3 and BaFe12O19 within a glass matrix. This method enables precise control over crystal content and electromagnetic properties. An optimal composition ratio of BaTiO3 to BaFe12O19 at 3:2 demonstrates exceptional impedance matching and remarkable electromagnetic attenuation. At 3.7 GHz, the glass ceramic exhibits a minimal reflection loss of −44.5 dB, while maintaining an effective absorption bandwidth of 3.93 GHz with a 2 mm thickness. This research underscores the promising potential of magnetoelectric glass ceramics as advanced materials for achieving high-performance electromagnetic wave absorption.

High-performance electromagnetic wave absorption of NiS/Ni0.96S@multi-walled carbon nanotube composites

In this work, composites of heterogeneous nickel sulfide with multi-walled carbon nanotubes (MWCNTs) were prepared by a simple hydrothermal method. The dielectric loss capacity of composite materials is enhanced with the introduction of CNTs. Meanwhile, with the increase of CNTs content, the particle size of nickel sulfide decreases and the specific surface area increases, which is beneficial to enhance the microwave absorption capacity of the sample. The composite with the best microwave absorption performance was obtained by changing the NiS/Ni0.96S@MWCNTs mass ratio. By adjusting the NiS/Ni0.96S@MWCNTs mass ratio to 6:1, the effective absorption bandwidth is 3.76 GHz, corresponding to a thickness of 1.3 mm. Besides, the minimum reflection loss (RL) value was as high as –35.5 dB at 10.0 GHz with the thickness of 2.0 mm. The above results show that the prepared NiS/Ni0.96S@MWCNTs composite has the advantages of thin thickness, light weight, strong absorption and simple preparation, and is a microwave absorbing material with promising applications.

Enhanced electromagnetic wave absorption via optical fiber-like PMMA@Ti3C2Tx@SiO2 composites with improved impedance matching

Ti3C2Tx nanosheets have attracted significant attention for their potential in electromagnetic wave absorption (EWA). However, their inherent self-stacking and exorbitant electrical conductivity inevitably lead to serious impedance mismatch, restricting their EWA application. Therefore, the optimization of impedance matching becomes crucial. In this work, we developed polymethyl methacrylate (PMMA)@Ti3C2Tx@SiO2 composites with a sandwich-like core-shell structure by coating SiO2 on PMMA@Ti3C2Tx. The results demonstrate that the superiority of the SiO2 layer in combination with PMMA@Ti3C2Tx, outperforming other relative graded distribution structures and meeting the requirements of EWA equipment. The resulting PMMA@Ti3C2Tx@SiO2 composites achieved a minimum reflection loss of −58.08 dB with a thickness of 1.9 mm, and an effective absorption bandwidth of 2.88 GHz. Mechanism analysis revealed that the structural design of SiO2 layer not only optimized impedance matching, but also synergistically enhanced multiple loss mechanisms such as interfacial polarization and dipolar polarization. Therefore, this work provides valuable insights for the future preparation of high-performance electromagnetic wave absorbing Ti3C2Tx-based composites.

Construction of CoFe2O4/MXene hybrids with plentiful heterointerfaces for high-performance electromagnetic wave absorption through dielectric-magnetic cooperation strategy

Developing high-efficiency electromagnetic wave (EMW) absorption materials is urgently demanded but challenging to tackle the increasingly serious electromagnetic radiation pollution. In this regard, a novel multi-heterostructure hybrid consisting of two-dimensional MXene nanosheets and zero-dimensional CoFe2O4 nanoparticles was successfully constructed by facile solvothermal approach. Benefiting from the improved impedance matching, electric/magnetic coupling effect, polarization loss originated from numerous heterointerfaces and defects, as well as multiple reflection and scattering, the resultant CoFe2O4/MXene (CM) hybrids realize brilliant EMW absorption performance. Notably, the final EMW absorption performance of CM hybrids is closely associated with their electromagnetic parameters, which could be facilely regulated by adjusting the ratios of CoFe2O4 to MXene. The resultant CM hybrids present the optimal minimum reflection loss (RLmin) of −58.8 dB at 9.59 GHz with a tiny thickness of 2.36 mm and exhibit a broad effective absorption bandwidth (EAB) of 6.3 GHz (11.7–18.0 GHz) at a thickness of only 2.03 mm, which covers the whole Ku band. In addition, the effectiveness of CM hybrids as highly efficient EMW absorption materials in real condition is intuitively demonstrated by the radar cross section simulation. This work paves a new route for synthesizing high-performance MXene-based EMW absorption materials with superior practical application value.

Heterostructure design of hydrangea-like Co2P/Ni2P@C multilayered hollow microspheres for high-efficiency microwave absorption

Structural design and elemental doping are research hotspots for the preparation of lightweight absorbers with high absorption performance and low filling ratio. Herein, a P-doped hydrangea-like layered composite (Co2P/Ni2P@C) encapsulated with Ni-LDH was successfully synthesized by solvothermal method followed by phosphorization. The defects generated by P doping and the generation of multilayered nonuniform interfaces enhance the dielectric loss induced by polarization. Simultaneously, the magnetic phosphides induce magnetic loss and modulate the dielectric properties of the carbon matrix to enhance the conductive loss. The multilayered hollow structure of this composite promotes the scattering and reflection of electromagnetic waves and optimizes the impedance characteristics. As a result, the multilayered hollow Co2P/Ni2P@C composite exhibits an optimum reflection loss value (RL) of –64.6 dB at 15.1 GHz with a thickness of 2 mm and a filler ratio of only 10 wt%. The radar cross-section (RCS) attenuation further demonstrates that the material can dissipate microwave energy in practical applications. Overall, this work provides an effective development strategy for the design of multilayered high-performance electromagnetic wave (EMW) absorbers doped with strongly polarized elements.

Hollow silicon carbide microspheres for excellent and lightweight electromagnetic wave absorber

Developing semiconductor ceramic materials with lightweight, outstanding stability, and high-performance electromagnetic wave (EMW) absorption are attractive for harsh environments. Due to thermal and chemical stability, designable microstructure, and tunable dielectric property, microstructured silicon carbide (SiC) ceramics offer promising potential as excellent EMW absorbers while limited by the scarce fabricating methods. Here, a simple coaxial electrospinning technology and the high-temperature calcination process are developed for the first time to fabricate hollow SiC microspheres (HSCMs) for EMW absorbers. Owing to the sizeable SiC-free space interface in the shell and internal void, the inner hollow structure also endows HSCMs with excellent EMW absorbing properties. By comparing with the composite of 40 wt% solid SiC microspheres (SSCMs)/paraffine, it is found that the 40 wt% HSCMs/paraffin composite exhibits superior dielectric properties and a minimum reflection loss (RL) value of − 61.6 dB at 7.7 GHz and 3.4 mm thickness, associated with the most considerable adequate absorption bandwidth of 4.9 GHz (from 12.6 to 17.5 GHz) at 1.9 mm thickness. This work gives rise to a handy method for fabricating hollow SiC with lightweight and high-efficiency EMW absorption. It will potentially boost the development of next-generation EMW absorbers for harsh environment applications.

ZIF-67 derived Co@carbon nanotubes anchored on carbon fiber for efficient microwave absorption and mechanical enhancement

Rational design of multifunctional and high-performance electromagnetic wave (EMW) absorbers is highly desirable but still remains a challenge. Herein, the 3D heterostructural Co@carbon nanotubes/carbon fiber (Co@CNTs/CF) hybrids derived from ZIF-67/CF were successfully fabricated via the in-situ synthesis of ZIF-67 on CF and subsequent catalytic chemical vapour deposition. Intriguingly, the as-obtained composites acquire adjustable EMW absorption and favorable mechanical properties simultaneously. Specifically, taking advantage of adequate conductive paths, plentiful heterogeneous interfaces, suitable defect vacancies, appropriate magnetic loss, as well as optimized impedance matching, Co@CNTs/CF delivers a brilliant EMW absorption intensity of −45.11 dB at only 1.15 mm together with a broad effective absorption bandwidth (EAB) of 4.0 GHz (1.23 mm), and an unexpected minimal reflection loss up to −65.63 dB (3.84 GHz) coupled with an EAB of 3.6 GHz at merely 1.09 mm, respectively. In addition, the tunable EAB can be achieved in 2.6–18 GHz, covering 96 % of the test frequency by changing the absorber thickness from 0.93 to 5.0 mm (29 wt%). Moreover, the maximum radar cross section reduction can reach 48.8 dBm2. The uniform layer of CNTs with moderate crystallinity also enables Co@CNTs/CF to improve the tensile strength and Weibull modulus compared to unsized CF. This study paves a novel avenue for developing multifunctional materials based on CF through an efficient, controllable and low-cost approach.

Facile constructing Ti3C2Tx/TiO2@C heterostructures for excellent microwave absorption properties

Optimizing and enhancing the performance of electromagnetic wave (EMW) absorption materials relies on the modification of their composition and structure through heterogeneous interface engineering. Ti3C2Tx’s high conductivity results in an impedance mismatch, which hinders efficient EMW absorption. Herein, a one–step catalytic chemical vapor deposition (CCVD) method is used to construct the Ti3C2Tx/TiO2@C heterogeneous structure. Upon annealing at 500 °C, amorphous carbon is uniformly deposited on the Ti3C2Tx surface, thereby incorporating the scale–like TiO2 generated during the process. The inclusion of the amorphous carbon layer and TiO2 reduces the substrate’s conductivity, achieving optimized impedance matching. Additionally, building heterogeneous interfaces between Ti3C2Tx, TiO2, and C enriches multiple loss mechanisms involving dipole and interfacial polarization, ultimately enabling optimal EMW absorption performance. The minimum reflection loss (RLmin) value of Ti3C2Tx/TiO2@C–500 is –53.12 dB when its thickness and frequency are 1.15 mm and 13.80 GHz, respectively. Moreover, thermal infrared imaging confirms that coatings fabricated using Ti3C2Tx/TiO2@C–500 demonstrate a favorable heat dissipation rate, validating its effectiveness in addressing the challenge of efficient heat dissipation in electronic devices. This study significantly contributes to the progress of two–dimensional (2D) materials, enabling high–performance EMW absorption and expanding their applications in complex scenarios.