Shielding Mechanism Research Articles

Rational design of heterointerface between MoO2 and N-doped carbon with tunable electromagnetic interference shielding capacity

Exploring highly efficient electromagnetic interference (EMI) shielding filler is urgently desired for next-generation wireless communication and integrated electronics. In this regard, a series of heterogeneous MoO2/N-doped carbon (MoO2/NC) nanorods with tunable conductivity have been successfully synthesized by regulating the pyrolysis temperature within 600, 700 and 800 °C. Profiting from the rational design of heterointerface and low-dimensional structure, the MoO2/NC powder achieves stronger EMI shielding capacity with the incremental temperature. It is found that the MoO2/NC-800 nanorods exhibit the optimal average EMI shielding effectiveness (SE) of 57.2 dB at a thickness of ∼0.3 mm in the X band. Meanwhile, the corresponding shielding mechanisms of MoO2/NC nanorods are also elaborately explained. More interestingly, the increase of sintering temperature makes an obvious effect on absorption loss but has little influence on reflection loss, demonstrating that adjusting the pyrolysis temperature is an effective strategy to strengthen the electromagnetic energy dissipation.

Research on mechanical properties and electromagnetic shielding effectiveness in Mg-8Li-2Y-Zn/Al multilayered composites fabricated by asymmetric accumulative roll bonding

The development of efficient electromagnetic shielding materials is crucial for the mitigating electromagnetic pollution. In this study, multilayered composites were prepared by stacking the Mg-8Li-2Y-Zn alloy and pure Al. The Mg-8Li-2Y-Zn alloy served mainly as the absorbing layer of the material, and the pure Al as the reflecting layer. When electromagnetic waves enter the multilayered composites, they are subjected to the processed of absorption, reflection, and reabsorption. Subsequent to a theoretical discussion of the shielding mechanism of asymmetric accumulative roll bonding (AARB) processed composites, based on the electromagnetic wave shielding model. The results indicated that the shielding effectiveness (SE) of the composites gradually increased with an increase in the number of AARB passes. The increased SE could be attributed to the obvious microstructural orientation caused by AARB and the increased number of interlayer interfaces resulting from the addition of Al layers, which facilitated the reflection loss and multiple reflection loss of incident electromagnetic waves.

Directional electromagnetic interference shielding of asymmetric structure based on dual-needle 3D printing

Some special electronic equipment not only need to avoid the interference of external electromagnetic waves (EMWs), but also need to transmit effective signals. Therefore, the development of directional electromagnetic interference (EMI) shielding materials has a great prospect. The asymmetric structure, consisting of the porous magentic rGF (reduced graphene oxide and Fe3O4) layer and the dense electrical conductivity rGM (reduced graphene oxide and MXene) layer, was constructed by dual-needle 3D printing technology. After encapsulation and curing with polydimethylsiloxane (PDMS), the rGF/rGM/PDMS composites were prepared. When the ratio of rGF and rGM layers is 6:4, the SE values of rGF-6/rGM-4/PDMS composites are 38.75 dB and 30.79 dB respectively when EMWs are incident on the rGF layer and rGM layer respectively, and the ΔSE of which is about 8 dB. The results showed that the asymmetric structure composed of porous magnetic layer and dense deeply electric conductive layer could generate a special process of "weak reflection-absorption-strong reflection-reabsorption" for incident EMW. At the same time, the simulation results of the waveguide method validated the experimental results, and further explained the directional EMI shielding mechanism of asymmetric structure. For the first time, this work designs an asymmetric structure based on the double needle 3D printing technology, which provides useful inspiration for the structural design and potential application of directional EMI shielding materials.

Variable energy X-ray fluorescence source

We detail the design of a variable energy, x-ray fluorescence source using a low activity (1.8×106 dpm) 99Tc β source that irradiates thin foils. By rotating the source among foils of Ti, Zn, Nb, Ag, and Au, the device produces x rays between 4 and 70 keV at a rate near 1 Hz. When the source is placed in a storage position, the external radiation is non-detectable. The design of the shielding and rotation mechanism permits use in vacuum and at liquid nitrogen temperature. The design is intended for the study of the low energy response to radiation impinging upon Ge detector surfaces. The source will be useful for understanding the detector response in large-scale Ge arrays such as Majorana and LEGEND.

Magnetic-conductive bi-gradient structure design of CP/PGFF/Fe3O4 composites for highly absorbed EMI shielding and balanced mechanical strength

• CP/PGFF/Fe 3 O 4 composites were successfully prepared by simple vacuum-assisted filtration and hot-pressing process. • The magnetic-conductive bi-gradient structure was constructed by sieving zero-dimensional Fe 3 O 4 and one-dimensional CNT. • The bi-gradient structured composites reduced reflection coefficient by more than 0.32. • The composites were proven to effectively block the cell phone signals. Developing excellent absorption-dominant electromagnetic interference (EMI) shielding composites is an urgent demand for the rapid development of 5G technology and electronic equipment. Herein, a simple strategy is employed to fabricate carbon nanotubes-polypropylene fibers (CP) /polypropylene-glass fibers felt (PGFF)/Fe 3 O 4 composites with superior EMI shielding effectiveness and low reflection due to the magnetic-conductive bi-gradient structure which is naturally formed by deposition during the vacuum-assisted filtration process. The difference in dimensionality between one-dimensional CNT with outstanding electrical conductivity and zero-dimensional magnetic Fe 3 O 4 nanoparticles is the theoretical basis for the successful construction of the magnetic-conductive bi-gradient structure in a gap-rich PGFF matrix that endows the composites with “absorb-reflect-reabsorb” EMI shielding mechanism. When the electromagnetic waves are incident from the magnetic layer, the EMI shielding effectiveness (SE) reaches 48.9 dB as the weight percentage of the conductive layer increases, more importantly, the reflection coefficients are reduced by more than 0.32 compared with that of another incident pattern. What's more, the resultant composites exhibit an outstanding signal shielding function in the application. This work paves a convenient pathway for designing a magnetic-conductive bi-gradient structure and efficient absorbing EMI shielding composites applied in the next-generated electronic information and communication field.

Structural design and preparation of Ti3C2Tx MXene/polymer composites for absorption-dominated electromagnetic interference shielding.

Electromagnetic interference (EMI) is a pervasive and harmful phenomenon in modern society that affects the functionality and reliability of electronic devices and poses a threat to human health. To address this issue, EMI-shielding materials with high absorption performance have attracted considerable attention. Among various candidates, two-dimensional MXenes are promising materials for EMI shielding due to their high conductivity and tunable surface chemistry. Moreover, by incorporating magnetic and conductive fillers into MXene/polymer composites, the EMI shielding performance can be further improved through structural design and impedance matching. Herein, we provide a comprehensive review of the recent progress in MXene/polymer composites for absorption-dominated EMI shielding applications. We summarize the fabrication methods and EMI shielding mechanisms of different composite structures, such as homogeneous, multilayer, segregated, porous, and hybrid structures. We also analyze the advantages and disadvantages of these structures in terms of EMI shielding effectiveness and the absorption ratio. Furthermore, we discuss the roles of magnetic and conductive fillers in modulating the electrical properties and EMI shielding performance of the composites. We also introduce the methods for evaluating the EMI shielding performance of the materials and emphasize the electromagnetic parameters and challenges. Finally, we provide insights and suggestions for the future development of MXene/polymer composites for EMI shielding applications.

An autonomous mobility protection scheme with authentic signal propagation detection is integrate using turnpike detectors

Abstract The technological innovation among a conscience as well as configured accessibility guidance conceptual model process has been combined mostly with digital technologies that generate integrated immediate transportation with adaptability shielding mechanism. The Intelligent as well as Adaptive Accessibility Benefits Interface updates and transmits roadway data collected by roadside sensors to a powerful guide known as a dynamic map (DM), which increases programmed portability control with high accuracy and reliability. To confirm the updating and establishment of roadway data to automatic motilities, we have built up a Wireless Electronic Traffic Mirror (WETM) that procures street data, perceives street items and moves acknowledgment data with a remote correspondence framework. Furthermore, to meet the security prerequisites, the AMAS should give the remote association most appropriate for portability. To give ideal remote availability, continuous remote channel checking, which quantifies the nature of remote channels with obstruction, is a significant assignment in the AMAS. The continuous peripheral distract surveillance implementation throughout combination with the generated WETM is mentioned in this report, and unambiguous confirmation including its exactness of every situation occurrence is revealed to explain the thinking beside how some the phenomenon including its pavement was improved.

Tuning the Electromagnetic Shielding Mechanism with Nitrogen‐doped Graphene Aerogels

AbstractThe electromagnetic shielding efficiency of a given material can be quantified as the sum of three contributions: reflection, absorption, and multiple reflections, which under certain conditions can be reduced to the first two, which are the main shielding processes decisive for its further application. A simple process to prepare nitrogen‐doped graphene aerogels followed by subsequent thermal treatments is proposed to adapt and control the shielding mechanisms that take place to the possible requirements of the system. Nitrogen‐doped aerogels are prepared by the addition of urea in the hydrothermal synthesis and subsequent heat treatments at 500 and 1000 °C. Reflection/absorption power ratio values of unity down to values as low as 0.2 are obtained. This study represents an advance in electromagnetic shielding materials and the adaptation of these to the needs of different applications, reducing the traditional negative environmental impact of these devices.

Flexible, stretchable and lightweight polyurethane and graphene nanoplatelets nanocomposite for high performance EMI shielding application

The incessant growth of technology has extensively increased the usage of electronics and telecommunication devices, leading to critical electromagnetic (EM) pollution and affecting the performance of intensely sensitive electronic devices. Herein, graphene nanoplatelets (GNP) were synthesized from the microwave intercalation method, followed by water-bath sonication. The different dosing of synthesized GNP (2, 4, 6, and 8 weight%) is further encapsulated in polyurethane (PU) matrix via solution casting technique to obtain enhanced electromagnetic interference (EMI) shielding performance. It was found that the 6 weight % of GNP (GNP6) having a density of 0.74 g/cc shows excellent stretching mechanical properties (> 400%), mechanical strength (1.4 times PU), electrical conductivity (2.75 S/m) and microwave properties. The maximum EMI shielding efficiency (SE) of 40.9 dB and 70.5 dB is noticed for GNP6 at 1 mm and 2 mm thickness, respectively. The SE is also measured for GNP6 2 mm thick sample after mechanically bending for 500 cycles and observed average variation <3 dB. The EMI SE is measured after placing the GNP6 inside the waveguide at different bending radii varying from 3 to 9 mm, and 75 dB of SE is observed for a bending radius of 3 mm. The fabricated GNP6 nanocomposite can show stable EMI shielding performance even after immersion in pure water, followed by sonication treatment for 2 hours and confirming the capability of the nanocomposite to handle the complex environment. The EMI shielding mechanism for GNP/PU is extensively explained concerning the microstructure and microwave properties. The computational analysis is done by simulating the GNP6 in the CST microwave studio tool over the broad frequency range (1-18 GHz). Thus, the highly stretchable, flexible, and lightweight GNP6 is a favourable nanocomposite providing a high EMI shielding value for next-generation electronic packaging of flexible electronic devices and coating of conformal devices used in aerospace industries.

Thermally conductive MWCNTs/Fe3O4/Ti3C2T MXene multi-layer films for broadband electromagnetic interference shielding

• MWCNTs/Fe 3 O 4 /Ti 3 C 2 T x MXene composite film with multi-layer architecture was fabricated by a facile method. • The obtained composite film exhibited high comprehensive performance, including high thermal conduction property and broadband EMI shielding property. • The EMI shielding mechanism of the composite film was comprehensively disclosed. The Ti 3 C 2 T x MXene is thought to be a promising candidate for next-generation electromagnetic interference (EMI) shielding materials. However, its broadband shielding capability and thermal conduction performance are insufficient to meet the growing demands. Herein, we reported a layer-by-layer composite film composed of Ti 3 C 2 T x MXene, multi-walled carbon nanotubes (MWCNTs), and Fe 3 O 4 nanoparticles. Benefitting from the architecture and the synergistic effect of components, the obtained composite film exhibited high comprehensive performance. Specifically, the introduction of Fe 3 O 4 magnetic nanoparticles effectively reduced the impedance mismatch between the composite film and air and enhanced the magnetic loss of the composite film. The layered structure prolonged the transmission path of electromagnetic waves inside the composite film and constructed a rich conductive network, causing interfacial polarization and ohmic loss. The results indicated that the composite film (52 μm) delivered a high EMI shielding effectiveness of 49 dB in the frequency range from X-band to K u -band. Furthermore, the MWCNTs layers in the composite films provided numerous heat transfer channels, reducing phonon scattering during heat transfer and resulting in a maximum thermal conductivity of 8.241 W/(m K).

Best practices for correlating electrical conductivity with broadband EMI shielding in binary filler-based conducting polymer composites

Multiple conductive fillers (MWCNT, GNP, Cu@Ag dendrite, EGain) were incorporated in a commercial polypropylene matrix through melt processing. Electrical conductivity, thermal conductivity, and EMI shielding properties of the fabricated composites were examined according to various filler compositions, and it was confirmed that the properties varied according to shape, composition, and mutual compatibility of the particulate fillers. In particular, at broadband frequencies (X-, Ka-, W- band), the EMI shielding properties reached 32.6 dB (at 10 GHz), 39.3 dB (at 28 GHz), 51.1 dB (at 77 GHz) for composites comprising of PC15 (0.3 mm) and the EMI shielding mechanisms according to the material thickness (0.3, 0.5, 1 mm) and the filler content were studied. As the frequency increased from 8.2–110 GHz, the reflection properties decreased from 90.93 % to 80.99 % (at 0.3 mm), and the absorption properties increased 9.01 % to 19.01 % even for PC15 (0.3 mm). In particular, the correlation between the type of electrical conductivity and the EMI shielding properties were investigated using a theoretical (Simon, Drude) model.

MOF-derived CoNC@rGO/amine-rich@rGO/fluorinated-epoxy nanocomposites with EMI shielding, mechanical robustness, superamphiphobicity and long-term anticorrosion properties

Along with the rapid development of electronic devices and communication systems, electromagnetic (EM) radiation pollution has become an increasingly serious problem. However, it is greatly challenging to achieve absorption-dominated electromagnetic interference (EMI) shielding and robust multifunctional simultaneously. In this work, we synthesize zeolitic imidazolate framework (ZIF67)-derived CoNC@reduced graphene oxide (rGO) and amine-rich surface rGO (NH2@rGO), and subsequently fabricate NH2-CoNC@rGO-fluorinated epoxy (FEP) nanocomposites by the microwave irradiation strategy, and this is the first time to obtain composite combining excellent EMI shielding, mechanical robustness, superamphiphobicity and long-term anticorrosion properties. Wherein, 3-(perfluoro-n-octyl) propenoxide (PFOP) provides the perfluorinated long chains, which improves both mechanical properties via internal antiplasticization effect, and the dispersity and loading of nanofiller via CF⋯HN/π interactions; 4,4′-hexafluoroisopropylidenediphenol diglycidyl ether (FAEP) increases the compatibility and mechanical robustness; NH2@rGO provides the good interfacial bonding, dielectric attenuation and anode protection; CoNC@rGO endows suitable magnetic and dipolar relaxation loss, micro/nanostructures and cathodic protection. Remarkably, the optimized nanocomposite exhibits satisfied tensile and impact strength (64.4 MPa, 33.7 kJ/m2), EMI shielding properties (56 dB), thermal conductivity (1.13 W·m−1·K−1), superhydrophobicity (154°) and superoleophobicity (151°), self-cleaning, good chemical and mechanical robustness, Joule heating capacity and long-term anticorrosion (30 d). Furthermore, the microwave irradiation effect, multiple EMI shielding and anti-corrosion mechanism have been discussed in detail. This study provides an efficient guideline for designing multicomponent and multidimensional epoxy nanocomposite with EMI shielding and robust multifunctional property in aerospace, underwater equipment, electronic devices and precision construction protection.

Achieving absorption-type electromagnetic shielding performance in silver micro-tubes/barium Ferrites/Poly(lactic acid) composites via enhancing impedance matching and electric-magnetic synergism

High conductivity can give materials excellent electromagnetic shielding performance, but it leads to serious impedance mismatching and causes inevitable secondary pollution. Developing materials with both excellent microwave absorption and microwave shielding performance remains a formidable challenge. Herein, absorption-type electromagnetic shielding materials with high electromagnetic shielding effectiveness (EMW SE) values were successfully prepared by combining hollow silver micro-tubes and magnetic nano-barium ferrites. The electromagnetic parameters and impedance matching of the composites could be easily regulated by changing the ratio of silver micro-tubes (C) and nano-barium ferrites (M). Thanks to micro-tube structure and the electric-magnetic synergism of the fillers, the composites with the C:M ratio of 9:1 exhibited a high absorption coefficient (A) value of ∼0.77 and a high EMW SE value of ∼100 dB, simultaneously. The absorption-type shielding mechanism of the composites was also evaluated via discussing real and imaginary parts of complex permittivity, real and imaginary parts of complex permeability, and Cole-Cole curves. Furthermore, the composites with the C:M ratio of 3:7 exhibited excellent microwave adsorption performance with the minimum reflection loss of −46.3 dB at thickness of 3.0 mm and a maximum effective absorption band-width of 6.13 GHz.

Superhydrophobic hollow magnetized Fe3O4 nanospheres/MXene fabrics for electromagnetic interference shielding

The development of high-performance electromagnetic interference (EMI) shielding materials is urgently needed to mitigate electromagnetic radiation pollution. Two-dimensional transition metal carbides (MXenes) are promising EMI shielding materials because of their high metallic electrical conductivity. However, tuning the EMI shielding performance of MXene composites remains challenging via the structure engineering strategy. Herein, we develop a layer-by-layer assembling strategy to construct multilayer sandwiched hollow magnetic Fe3O4 nanospheres (HFO)/MXene on flexible nonwoven fabrics. The fabricated Fe3O4/MXene composite fabrics (HFMs) exhibit low sheet resistance (4.6 Ω/□), super-hydrophobicity, self-cleaning, and good EMI shielding performance (EMI shielding effectiveness of 33.28 dB). More importantly, the EMI shielding mechanism of HFMs is tunable according to the loaded active materials. Thus, the mechanism can alternate from absorption to reflection. Moreover, the HFMs exhibit good electrothermal performance and can be used as a wearable heater for personal thermal management. This work provides a new approach for the structural design of high EMI shielding materials, and paves the way for the development of wearable electronics.

Janus-inspired flexible cellulose nanofiber-assisted MXene/Silver nanowire papers with fascinating mechanical properties for efficient electromagnetic interference shielding

MXene-based nanocomposites are highly desirable for electromagnetic interference (EMI) shielding applications. However, it is crucial but challenging to obtain an excellent trade-off between mechanical properties and EMI performances. Herein, inspired by Janus structure, flexible cellulose nanofiber-assisted MXene/silver nanowires (CNF-MXene/AgNWs) papers (CMAPs) are developed by a scalable sequential self-assembly plus a hot-pressing strategy. The ingenious introduction of highly conductive AgNWs into MXene forms a complementary leaf-like nanostructure, synergistically constructing highly effective conductive frameworks. Contributed by the designed Janus architecture, high-performance CNF substrate, and extensive hydrogen-bonding interactions, the resultant Janus CMAPs (J-CMAPs) with a low MXene/AgNWs addition of 30 wt% possess a high electrical conductivity (1066.85 S/cm), excellent mechanical strength (224.04 MPa) and modulus (9.98 GPa), exceptional EMI shielding effectiveness of 43.65 dB, and record-high EMI SE/t of 16788.51 dB cm−1 and SSE/t of 10543.18 dB cm2 g−1 with a reflection-dominant shielding mechanism, successfully achieving an outstanding balance between mechanical properties and EMI shielding performances. More importantly, high frequency structure simulator (HFSS) simulation in the frequency domain is further conducted to intuitively comprehend the attenuation process of electromagnetic waves and shield mechanism, verifying fascinating EMI shielding performances. Besides, the Janus paper also presents desirable Joule heating performances at low input voltage, short response time (<10 s), and superb heating stability and long-term steady reliability. We believe that the J-CMAPs demonstrate the great potential and advantage for advanced EMI shielding and portable thermal management applications.

Absorption-based electromagnetic interference shielding composites with sandwich structure by one-step electrodeposition method

The absorption-dominant electromagnetic interference (EMI) shielding materials with light weight, great flexibility, fast heat dissipation and excellent mechanical strength are highly demanded in civil and military applications. In this regard, the absorption-based CNT/Co composite film with sandwich structure (Co/Co-CNT/Co layer) was designed for highly EMI shielding performance and heat dissipation. The existence of Co layers on CNT/Co composite film has suitable impedance matching between film and free space, which can increase EM waves absorption and decrease EM waves reflection. Appropriately incorporating Co nanoparticles into the CNT film can facilitate the interfacial polarization, dipole polarization and dielectric loss derived from conduction loss, thus CNT/Co composite film shows high EMI shielding effectiveness (EMI SE: 49 dB), tensile strength (120 MPa), excellent electrical and thermal conductivity of 61.1 S/cm and 66.8 W/mK respectively. Furthermore, the ratio of absorption (SEA) and total EMI SE (SET) for pristine CNT film is 86.64% and for CNT/Co composite film is 93.31%, and the ratios of A/R for pristine CNT film (0.58) and CNT/Co composite film (1.20) manifest that the EMI shielding mechanism transforms from reflection to absorption. This work offers a novel method to develop the sandwich-structure composites with absorption-dominant EMI shielding performance in the application of advanced multifunctional electromagnetic shielding field.

Stress shielding in laser melting multilayered nickel-base superalloys under monotonic and cyclic loadings

In the present work, the mechanical properties and fatigue performance of laser melted mismatching nickel-base superalloys were investigated by multiscale experiments and computations. It confirmed that the local strength degradation does not affect the macroscopic stress–strain responses and overall low-cycle fatigue performance due to the stress shielding in the remelting material. The stress shielding mechanism was quantitatively illuminated and the critical shielding criterion was established. Accumulation of cyclic plastic deformations stimulates the cyclic stress softening and complete tensile mean stress relaxation in the remelting material, which significantly decreases the fatigue driving force of the mismatching material.

Double layered design for electromagnetic interference shielding with ultra-low reflection features: PDMS including carbon fibre on top and graphene on bottom

Electromagnetic interference (EMI) shielding materials with low reflection features have become necessary for a new generation of electronic devices to reduce secondary electromagnetic pollution. Here, a novel strategy is adopted to provide flexible polydimethylsiloxane (PDMS) composite films with ultra-low reflection EMI shielding performance by constructing a double-layer structure with uniformly dispersed carbon fibres (CFs) in the upper layer as an impedance-matching absorption layer and continuous graphene fibres (GFs) located at the bottom layer as a conductive reflection layer. The resulting specific structure significantly reduces the reflectivity of the composite film at extremely low carbon conductive fillers (0.01 wt% CFs and 1.00 wt% GFs) through the process of “absorption-reflection-reabsorption” when incident electromagnetic waves (EMWs) pass through the composite film: the total shielding effectiveness (SETotal) achieves 34.4 dB at 18.0 GHz, while the shielding effectiveness of reflection (SER) is only 0.1 dB, and reflection coefficient (R) is as low as 0.018. This phenomenon indicates that 1.8% of the incident EMWs are reflected in the propagation process when 99.96% are attenuated. In addition, the shielding mechanism of the double-layer EMI shielding composite films with low reflection features is studied in depth. This study provides a reliable idea for designing flexible EMI shielding materials with ultra-low reflection to alleviate secondary electromagnetic radiation pollution.

RGO reinforced Cu foam with enhanced mechanical and electromagnetic shielding properties

With a unique cellular structure to enhance the multi-reflection and multi-absorption properties of electromagnetic waves, metal foam is considered a new type of electromagnetic shielding material that can also be used for lightweight structural applications such as energy absorption and shock attenuation. This work introduces reduced graphene oxide (RGO) to reinforce Cu foam for the purpose of improvement of the foam's mechanical and electromagnetic shielding properties. After the preparation stage of the electrodeposition and heat treatments, the RGO was observed to uniformly disperse in the Cu foam matrix and nano-sized Cu2O particles formed at the interface. This resulted in improved mechanical properties and electromagnetic shielding performance compared to the pure Cu foams. The primary shielding mechanism was deduced as absorption loss.

Tuning the Self-Assembled Morphology of Ti3C2Tx MXene-Based Hybrids for High-Performance Electromagnetic Interference Shielding.

Hybrid materials based on transition metal carbide and nitride (MXene) nanosheets have great potential for electromagnetic interference (EMI) shielding due to their excellent electrical conductivity. However, the performance of final products depends not only on the properties of constituent components but also on the morphology of the assembly. Here, via the controlled diffusion of positively charged poly(allylamine hydrochloride) (PAH) chains into the negatively charged Ti3C2Tx MXene suspension, MXene/PAH hybrids in the forms of thin films, porous structures, and fibers with distinguished internal morphologies are obtained. Our results confirm that PAH chains could effectively enhance the oxidation stability and integrity of wet and dry MXene structures. The flexibility to tune the structures allows for a thorough discussion of the relations between the morphology, electrical conductivity, and EMI shielding mechanism of the hybrids in a wide range of electrical conductivity (2.5 to 3347 S·cm-1) and thickness (7.7 to 1900 μm) values. The analysis of thin films shows the direct impact of the polymer content on the alignment and compactness of MXene nanosheets regulating the films' electrical conductivity/EMI shielding effectiveness. The colloidal behavior of the initial MXene suspension determines the interconnection of MXene nanosheets in MXene/PAH porous assemblies and the final electrical properties. In addition to the internal morphology, examining the laminated MXene/PAH fibers with geometrically different arrangements demonstrates the role of conductive network configuration on EMI shielding performance. These findings provide insights into tuning the EMI shielding effectiveness via the charge-driven bottom-up assembly of electrically conductive MXene/polyelectrolyte hybrids.