Outstanding Electromagnetic Interference Research Articles

Leather-like hierarchical porous composites with outstanding electromagnetic interference shielding effectiveness and durability

Delicate microstructure design and suitable matrixes are vital for attaining advanced electromagnetic interference (EMI) shielding materials with lightweight, flexible, durable, processible features. By mimicking natural leather, a three-dimensional (3D) hierarchical porous scaffold integrated with silver nanowires (AgNWs) and anti-abrasion polyurethane (PU) was constructed via a facile dip-coating method at ambient temperature. The interconnected micrometer-sized voids and unique hierarchical structure of this composite benefit uniform AgNWs anchored and the superior shielding performance by significantly enhancing the absorption loss of electromagnetic waves (98.5%). Intriguingly, the leather-like composite possesses the best EMI shielding effectiveness (~110 dB, 8.2–12.4 GHz) compared with reported natural leather-based shielding materials to date. Furthermore, the 3D PU network provides strong adhesion strength and mechanical properties, allowing the stable and durable EMI shielding performance of such composite to resist ultrasonic washing, strong acid, strong base, tape-peeling, bending, and abrasion.

Multifunctional carbon fiber@NiCo/polyimide films with outstanding electromagnetic interference shielding performance

The electromagnetic interference (EMI) shielding materials with low reflection characteristics are highly desirable for integrated communication and microelectronics systems to shield EM waves and their secondary pollution. In this study, the EMI shielding materials with outstanding absorption performance were fabricated via the two-step pyrolysis and followed by vacuum assisted filtration approach. The chopped carbon fibers (CFs) wrapped with NiCo2O4 nanowire arrays (CF@NiCo2O4) were prepared by the hydrothermal reaction initially. After annealing, the NiCo2O4 nanowires transformed into NiCo alloy nanoparticles and evenly embedded in the CFs, endowing the CF@NiCo composites with efficient magnetic loss and dielectric loss capacity. After vacuum filtration and encapsulation with polyimide, the obtained flexible CF@NiCo/polyimide composite film displays superior EMI shielding effectiveness of 87 dB with a thickness of only 1.08 mm. Particularly, the composite film exhibits extremely low SER characteristics of ~6 dB, which surpasses those of most previously reported composites materials with similar thickness. In addition, the composite films present outstanding flexibility, mechanical properties and Joule heating performances. Therefore, the prepared flexible composite films have broad prospect for EMI shielding and thermal management applications in advanced microelectronic systems.

Microcellular epoxy/graphene nanocomposites with outstanding electromagnetic interference shielding and mechanical performance by overcoming nanofiller loading/dispersion dichotomy

With the rapid evolvement of wireless communication technologies, the ever increasing needs to prevent electromagnetic waves (EMWs) pollution have urged the development of lightweight materials with excellent electromagnetic interference (EMI) shielding property. However, achieving desired EMI shielding performance often requires high loadings of conductive nanofillers, like graphene, which poses challenges to control the nanoparticle dispersion and the mechanical performance of the nanocomposite. Herein, we demonstrate a method to fabricate highly-loaded (>30 wt%) graphene in microcellular epoxy nanocomposites, successfully overcoming the long-lasting dichotomy in the field of nanocomposites of high filler loading and dispersion. By utilizing supercritical CO2 foaming method, modified thermosetting epoxy-based nanocomposite was foamed with multiple interfaces and tunable microcellular cells. In addition, a rearrangement of nanofillers during foaming process is favorable for more intense conductive network, leading to enhanced EMWs attenuation by repeated reflections and absorptions. An optimal combination of electrical conductivity (314 S m−1), EMI shielding effectiveness (86.6 dB and 156.3 dB/(g/cm3)), compressive strength (27.4 MPa) and density (0.55 g cm−3) has been achieved for foamed nanocomposite with 32.26 wt % graphene content. This versatile method opens up an easy route to fabricate lightweight structural foams with high nanofiller contents, which could be used in many applications such as electronics, robotics, and aircrafts.

A breathable and flexible fiber cloth based on cellulose/polyaniline cellular membrane for microwave shielding and absorbing applications

High-performance electromagnetic (EM) wave absorption and shielding materials integrating with flexibility, air permeability, and anti-fatigue characteristics are of great potential in portable and wearable electronics. These materials usually prepared by depositing metal or alloy coatings on fabrics. However, the shortcomings of heavy weight and easy corrosion hamper its application. In this work, the cellulose nanofiber (CF) fabric was prepared by electrospinning technology. Then, conductive polyaniline (PANI) was deposited on the CF surface via a facile in-situ polymerization process. The interweaving cellulose/polyaniline nanofiber (CPF) composite constructs a conductive network, and the electrical conductivity can be adjusted by polymerization time. Benefiting from optimal impedance matching, strong conductive loss, as well as interfacial polarization, the CPF possesses excellent EM absorption performance. The minimum reflection loss (RLmin) value is −49.24 dB, and the effective absorption bandwidth (RL < −10 dB, fe) reaches 6.90 GHz. Furthermore, the CPF also exhibits outstanding electromagnetic interference (EMI) shielding capability with shielding efficiency (SE) of 34.93 dB in the whole X band. Most importantly, the lightweight CPF fabrics have the merits of mechanical flexibility, breathability and wash resistance, which is highly applicable for wearable devices.

Facile Fabrication of Densely Packed Ti3C2 MXene/Nanocellulose Composite Films for Enhancing Electromagnetic Interference Shielding and Electro-/Photothermal Performance

The development of modern electronics has raised great demand for multifunctional materials to protect electronic instruments against electromagnetic interference (EMI) radiation and ice accretion in cold weather. However, it is still a great challenge to prepare high-performance multifunctional films with excellent flexibilty, mechanical strength, and durability. Here, we propose a layer-by-layer assembly of cellulose nanofiber (CNF)/Ti3C2Tx nanocomposites (TM) on a bacterial cellulose (BC) substrate via repeated spray coating. CNFs are hybridized with Ti3C2Tx nanoflakes to improve the mechanical properties of the functional coating layer and its adhesion with the BC substrate. The densely packed hierarchical structure and strong interfacial interactions endows the TM/BC films with good flexibility, ultrahigh mechanical strength (>250 MPa), and desirable toughness (>20 MJ cm-3). Furthermore, benefiting from the densely packed hierarchical structure, the resultant TM/BC films present outstanding EMI shielding effictiveness of 60 dB and efficient electro-/photothermal heating performance. Silicone encapsulation further imparts high hydrophobicity and exceptional durability against solutions and deformations to the multifunctional films. Impressively, the silicone-coated TM/BC film (Si-TM/BC) exhibits desirable low voltage-driven Joule heating and excellent photoresponsive heating performance, which demonstrates great feasibility for efficient thermal deicing under actual conditions. Therefore, we believe that the Si-TM/BC film with excellent mechanical properties and durability holds great promise for the practical applications of EMI shielding and ice accretion elimination.

Robust and flexible silver-embedded elastomeric polymer/carbon black foams with outstanding electromagnetic interference shielding performance

Designing robust, flexible, and low metal consuming hybrid foams for high-performance electromagnetic interference (EMI) shielding is crucial yet challenging. A new metallization strategy of foam type materials is presented to fabricate the robust and flexible silver embedded poly (styrene-block-butadiene-block-styrene)/carbon black hybrid foam (Ag@SBS/CB) with ultra-low silver consumption. The synergistic effect between the embedded isolate Ag nanoparticles and carbon black endows the Ag@SBS/CB foam with high mechanical and electrical stability as well as outstanding EMI shielding performance. The Ag@SBS/CB foam can endure over 1500 cycles of the compression-release test without detectable decay in the relative conductivity. A significant influence of the pore size and the silver fraction on the EMI shielding performance is revealed, providing an intriguing microstructure design strategy. The EMI shielding effectiveness (SE) of the foam reaches 81.3 dB with the silver fraction of 0.63 vol% and a CB fraction of 15 wt% at a thickness of about 5 mm. In particular, the Ag@SBS/CB foam with a thinner thickness of 2 mm shows a much better near-field EMI shielding than Al plate.

Ti3C2Tx MXene -AgNW composite flexible transparent conductive films for EMI shielding

Herein, nanosheets-silver nanowire (AgNW) based composite transparent conductive films (TCFs) with polyurethane (PU) as substrates were prepared. Nanosheets-AgNW based composite TCFs possess outstanding optoelectrical properties and electromagnetic interference (EMI) shielding performances, and novel Ti3C2Tx MXene nanosheets illustrate superior performances than graphene oxide nanosheets due to metallic conductivity. MXene-AgNW TCF performs a sheet resistance of 16 Ω/sq, a transmittance of 86.1% and an EMI shielding effectiveness (SE) of 27.8 dB in 8–13 GHz, resulting from the synergistic effect of conductive nanosheets and nanowires. AgNW network embedded in PU and coated by MXene nanosheets exhibits promoted surface roughness with a root mean square roughness of 5.4 nm, and optoelectrical properties can remain after 5000 bending cycles or 90 s corrosion of Na2S solution. The novel solution process fabricated MXene-AgNW composite TCFs with outstanding optoelectrical properties, smoothness, stability and EMI shielding performance illustrate a great potential for commercial application in next-generation flexible electronics.

Flexible and Waterproof 2D/1D/0D Construction of MXene-Based Nanocomposites for Electromagnetic Wave Absorption, EMI Shielding, and Photothermal Conversion

High-performance electromagnetic wave absorption and electromagnetic interference (EMI) shielding materials with multifunctional characters have attracted extensive scientific and technological interest, but they remain a huge challenge. Here, we reported an electrostatic assembly approach for fabricating 2D/1D/0D construction of Ti3C2Tx/carbon nanotubes/Co nanoparticles (Ti3C2Tx/CNTs/Co) nanocomposites with an excellent electromagnetic wave absorption, EMI shielding efficiency, flexibility, hydrophobicity, and photothermal conversion performance. As expected, a strong reflection loss of -85.8 dB and an ultrathin thickness of 1.4 mm were achieved. Meanwhile, the high EMI shielding efficiency reached 110.1 dB. The excellent electromagnetic wave absorption and shielding performances were originated from the charge carriers, electric/magnetic dipole polarization, interfacial polarization, natural resonance, and multiple internal reflections. Moreover, a thin layer of polydimethylsiloxane rendered the hydrophilic hierarchical Ti3C2Tx/CNTs/Co hydrophobic, which can prevent the degradation/oxidation of the MXene in high humidity condition. Interestingly, the Ti3C2Tx/CNTs/Co film exhibited a remarkable photothermal conversion performance with high thermal cycle stability and tenability. Thus, the multifunctional Ti3C2Tx/CNTs/Co nanocomposites possessing a unique blend of outstanding electromagnetic wave absorption and EMI shielding, light-driven heating performance, and flexible water-resistant features were highly promising for the next-generation intelligent electromagnetic attenuation system.HighlightsThe 2D/1D/0D Ti3C2Tx/carbon nanotubes/Co nanocomposite is successfully synthesized via an electrostatic assembly.Nanocomposites exhibit an excellent electromagnetic wave absorption and a remarkable electromagnetic interference shielding efficiency.The flexible, waterproof, and photothermal conversion performances are achieved.

PH triggered hydrogen bonding for preparing mechanically strong, electromagnetic interference shielding and thermally conductive waterborne polymer/graphene@polydopamine composites

Flexible and highly filled conductive polymer composites with strong mechanical properties are highly desirable as electromagnetic interference (EMI) shielding and thermally conductive materials for human protection and wearable devices. Herein, a tough interface has been built up by the combination of polydopamine modification and pH triggered hydrogen bonding to prepare flexible and mechanically robust waterborne polyacrylate/graphene@polydopamine composites. Graphene was modified with polydopamine via an in-situ polymerization method. By adjusting the initial pH value in the film formation process, the transition from electrostatic repulsion to hydrogen bonding between graphene@polydopamine and polyacrylate was engineered for improving the mechanical properties. At optimal pH value, the maximum tensile strength of the composite is enhanced by 137% compared with that of neat polymer matrix. Moreover, the composite with filler loading of 20 wt% exhibits an EMI shielding effectiveness of 58 dB at 0.6 mm thickness and thermal conductivity of 1.68 W/m·K, respectively. The practical application of the composite film and composite coated leather also demonstrates their outstanding flexibility, EMI shielding, and heat dissipation performance, indicating their excellent potential as EMI shielding and thermally conductive materials in wide areas such as wearable devices, telecommunication systems, and human protection.

Facile fabrication of porous fire-resistant graphene macro-assembly with outstanding electromagnetic interference shielding performance

Free-standing bifunctional reduced graphene oxide paper (RGOP) was facilely fabricated by evaporative self-assembly and hydrazine hydrate vapor reduction. The RGOP integrates remarkable fire resistance and outstanding electromagnetic interference (EMI) shielding performance with a total shielding effectiveness value of 41.5 dB at 0.49 mm thickness in the X band. This research provides a facile pathway to fabricate graphene macro-assembly for fire safety and EMI shielding applications.

Robust superhydrophobic and porous melamine-formaldehyde based composites for high-performance electromagnetic interference shielding

The high electromagnetic interference (EMI) shielding performance composites with light-weight and multi-function have become the main developing orientation in the EMI shielding materials field. This study aims to fabricate lightweight melamine-formaldehyde-based composite (SiO2@Ag@MF) foams with high EMI shielding characteristics through facile and green electroless silver (Ag) plating and polydimethylsiloxane/SiO2 (PDMS/SiO2) coating methods. The results indicated that SiO2@Ag@MF foam possessed outstanding EMI shielding performance with the maximum shielding effectiveness (SET) of 65 dB, low density (0.014–0.019 g/cm3), and high specific shielding effectiveness (SSET) of 3439 dB cm3 g−1 due to the open-cell porous structure and high electroconductive Ag-plated skeleton. Meanwhile, because of the PDMS and SiO2 coating, the composite foam delivers superhydrophobicity, anti-corrosion, and anti-fatigue performance.

A Carbon Composite Film with Three-Dimensional Reticular Structure for Electromagnetic Interference Shielding and Electro-Photo-Thermal Conversion.

The design of flexible wearable electronic devices that can shield electromagnetic waves and work in all weather conditions remains a challenge. We present in this work a low-cost technology to prepare an ultra-thin carbon fabric–graphene (CFG) composite film with outstanding electromagnetic interference shielding effectiveness (EMI SE) and electro-photo-thermal effect. The compatibility between flexible carbon fabric skeleton and brittle pure graphene matrix empowers this CFG film with adequate flexibility. The reticular fibers and porous structures play a vital role in multiple scattering and absorption of electromagnetic waves. In the frequency range of 30–1500 MHz, the CFG film can achieve a significantly high EMI SE of about 46 dB at tiny thickness (0.182 mm) and density (1.4 g cm−3) predominantly by absorption. At low safe voltages or only in sunlight, the film can self-heat to its saturation value rapidly in 40 s. Once the electricity or light supply is stopped, it can quickly dissipate heat in tens of seconds. A combination of the EMI SE and the prominent electro-photo-thermal effect further enables such a remarkable EMI shielding film to have more potential applications for communication devices in extreme zones.

Superhydrophobic and Flexible Silver Nanowire-Coated Cellulose Filter Papers with Sputter-Deposited Nickel Nanoparticles for Ultrahigh Electromagnetic Interference Shielding.

Superhydrophobic, flexible, and ultrahigh-performance electromagnetic interference (EMI) shielding papers are of paramount importance to safety and long-term service under external mechanical deformations or other harsh service environments because they fulfill the growing demand for multipurpose materials. Herein, we fabricated multifunctional papers by incorporating sputter-deposited nickel nanoparticles (NiNPs) and a fluorine-containing coating onto cellulose filter papers coated with silver nanowires (AgNWs). AgNW networks with sputter-deposited NiNPs provide outstanding magnetic properties, electrical conductivity, and EMI shielding performance. At an AgNW content of 0.109 vol % and a NiNP content of 0.013 mg/cm2, the resultant papers exhibit a superior EMI shielding effectiveness (SE) of 88.4 dB. Additionally, the fluorine-containing coating endows the resultant papers with a high contact angle of 149.7°. Remarkably, the obtained papers still maintain a high EMI SE even after 1500 bending cycles or immersion in water, salt, or strong alkaline solutions for 2 h, indicating their outstanding mechanical robustness and chemical durability. This work opens a new window for designing and implementing ultrahigh-performance EMI shielding materials.

Flexible PTFE/MXene/PI soft electrothermal actuator with electromagnetic-interference shielding property

In recent years, soft electrothermal actuators (ETAs) have attracted great concern because of their potential applications in biomimetic intelligent devices, soft robotics and aerospace engineering. However, achieving the simultaneous optimization of low-voltage actuation, ultrafast preparation and highly integrated functionality are main challenges to the development of ETAs. Herein, a flexible, hydrophobic, mechanically robust and electromagnetic-interference (EMI) shielding PTFE/MXene/PI soft ETA is constructed through a very simple and fast “cutting and sticking” method by taping PTFE and PI tapes onto the surface of MXene film. The commercially available PTFE and PI tapes endow PTFE/MXene/PI sandwich structure with ideal mechanically robustness and hydrophobic self-cleaning function, thus it can work in different environments. Remarkably, PTFE/MXene/PI sandwich structure shows an outstanding EMI shielding ability with the maximum SET value of 44 dB owing to the high electrical conductivity of MXene film. More importantly, the PTFE/MXene/PI sandwich actuator can bend from PTFE side toward PI side under the electrical stimulus, because the excellent electrothermal MXene layer is sandwiched between the two tapes with large difference in thermal expansion coefficients. Under a 6 V low voltage, the actuator can generate heat energy with the maximum saturation temperature of 110 °C and large bending deformation with the maximum bending angle of 122° within 40 s. Interestingly, the PTFE/MXene/PI structure can be designed and manufactured in different shapes and configurations upon actuation, such as the “S” shape and four-finger gripper. At last, a smart shielding curtain with the combination of actuation properties and EMI shielding performance is finally developed as a principle of concept, which further indicates the multifunctional PTFE/MXene/PI ETA can be widely applied in smart EMI shielding system and soft robotic devices.

Simultaneously improved mechanical and electromagnetic interference shielding properties of carbon fiber fabrics/epoxy composites via interface engineering

Carbon fiber reinforced composites (CFRC) are in huge demand in aviation industry for reducing the fuel consumption, despite the unfavorable electromagnetic interference (EMI) shielding property. In this work, carbon fiber fabrics (CF) were coated by a thin layer of nickel (Ni) using electroless plating to increase the electrical conductivity of the composites. Dopamine was then self-polymerized on Ni coated CF (CF-Ni) surfaces to enhance the interfacial interactions between fibers and epoxy matrix. The results showed that the introduction of 0.39 wt% of polydopamine (PDA) content leads to a significant increase of interlaminar shear strength (ILSS), tensile strength and modulus by 70.7%, 22.7% and 15.3%, respectively, compared with CF-Ni/epoxy composites with free of PDA. The dominant facture mechanisms changed from fiber pulling-out and/or debonding to fiber breakage after the introduction of PDA. Compared with CF/epoxy composites, the EMI shielding effectiveness (SE) of CF-Ni/epoxy composites increased by 77.2% and slightly decreased with the increase of the PDA content. In order to further optimize the overall performances of the composites, the laminates structures were specially designed by replacing 2 plies of CF-Ni-PDA with CF-PDA in the middle according to EMI shielding mechanisms. The composites with special laminate stacking exhibited outstanding ILSS (61.2 MPa) and EMI SE (31.0 dB), which are dominant over most reported structural composites. The effects of humidity on the mechanical and EMI shielding properties were evaluated as well, indicating that the composites played a huge application potential in aircraft.

Stretchable, mechanically resilient, and high electromagnetic shielding polymer/MXene nanocomposites

AbstractThe increasingly disturbing electromagnetic wave pollution has intensified research for high‐performance shielding materials to protect humans and the environment. It remains a great challenge to combine high electromagnetic interference (EMI) shielding performance with mechanical robustness and stretchability. These crucial features have been simultaneously achieved in this work by using a facile method to prepare elastomer/MXene nanocomposites. An EMI shielding effectiveness of 49 dB was obtained from a 1‐mm thick nanocomposite film at 19.6 vol% of MXene; the film has a density of 1.25 g/cm3. The outstanding electrical conductivity of MXene – 4350 ± 125 S·cm−1 – provided free charge carriers in the matrix to absorb electromagnetic signals, leading to the dominance of absorption mechanism over reflection mechanism. Owing to a nanofiller modification step, the nanocomposite films demonstrated not only outstanding EMI shielding but sufficient strength and stretchability. A nanocomposite at 14.0 vol% exhibited Young's modulus of 15.85 ± 0.75 MPa and tensile strength 25.94 ± 0.81 MPa with elongation at break of 170 ± 5.6%, which relates to high stretchability. These impressive properties make our nanocomposites suitable for use in harsh environments as well as applications in stretchable devices, protective clothing, aerospace, aircraft, and automotive industries.

Hierarchical Porous Film with Layer-by-Layer Assembly of 2D Copper Nanosheets for Ultimate Electromagnetic Interference Shielding.

The emergence of technologies, such as 5G telecommunication, electric vehicles, and wearable electronics, has prompted demand for ultrahigh-performance and cost-effective shielding materials to protect against both the potentially harmful effects of electromagnetic interference (EMI) on human health and electronic device operation. Here, we report hierarchical porous Cu foils via an assembly of single-crystalline, nanometer-thick, and micrometer-long copper nanosheets and their use in EMI shielding. Layer-by-layer assembly of Cu nanosheets enabled the formation of a hierarchically structured porous Cu film with features such as multilayer stacking; two-dimensional networking; and a layered, sheetlike void architecture. The hierarchical-structured porous Cu foil exhibited outstanding EMI shielding performance compared to the same thickness of dense copper and other materials, exhibiting EMI shielding effectiveness (SE) values of 100 and 60.7 dB at thicknesses of 15 and 1.6 μm, respectively. In addition, the EMI SE of the hierarchical porous Cu film was maintained up to 18 months under ambient conditions at room temperature and showed negligible changes after thermal annealing at 200 °C for 1 h. These findings suggest that Cu nanosheets and their layer-by-layer assembly are one of the promising EMI shielding technologies for practical electronic applications.

MXenes for electromagnetic interference shielding: Experimental and theoretical perspectives

MXenes are two-dimensional (2D) transition metal carbides, nitrides, and carbonitrides with unique intrinsic properties, including excellent electrical conductivity, 2D sheet morphology, lightweight, flexibility, tunable surface chemistry, and easy solution processability, thus attracting considerable attention as electromagnetic interference (EMI) shielding materials. In this review, we demonstrate, from both experimental and theoretical perspectives, that the outstanding EMI shielding performance of MXenes is determined not only by its intrinsic properties but also by extrinsic modifications such as the introduction of dielectric inclusions, pores, or other designed structures. This review provides guidance for the efficient application of available resources, as well as insights into the challenges that should be addressed to develop more efficient and economical MXene based shielding materials for the advanced electronics industry of the future.

Self-healable castor oil-based waterborne polyurethane/MXene film with outstanding electromagnetic interference shielding effectiveness and excellent shape memory performance

Recently, the increasing demands of the portable devices and flexible electronics have caused lots of electromagnetic wave pollution. MXene, a novel two-dimensional material, was considered as a promising two-dimensional material for preparing flexible electromagnetic interference (EMI) shielding films. Herein, we firstly synthesized a series of flexible and self-healable EMI shielding waterborne polyurethane (ADWPU) films by mechanically blending with Ti3C2Tx (ADWPU-T). Interestingly, the self-assembling between ADWPU and Ti3C2Tx constructed a tunable analogical structure providing reflection-absorption-multiple reflection shielding mechanism. Furthermore, the ADWPU-T emulsions were prepared from castor oil which is a low-cost and eco-friendly biomass polyol. The chain extender 2-aminophenyl disulfide endow a reversible dynamic polymer network which leading to shape memory performance (45°C heat treatment) and self-healing ability (60°C, 5 min healed). Above all, these multifunctional flexible films also exhibited outstanding EMI shielding performance (51.37 dB) and performed less decrement after 200 times bending and 80°C aging test for five days. Therefore, this work would provide a novel promising method for preparing responsive electromagnetic interference shielding products and smart electronic devices.

Intercalation: Constructing Nanolaminated Reduced Graphene Oxide/Silica Ceramics for Lightweight and Mechanically Reliable Electromagnetic Interference Shielding Applications.

There is a critical need to develop lightweight and mechanically reliable materials for electromagnetic interference (EMI) shielding applications in the harsh environment. In this study, we propose a low-density (∼2.2 g/cm3) reduced graphene oxide (rGO)/silica ceramic with multilayer rGO sheets parallelly aligned inside the silica matrix through a new intercalation strategy. The parallel rGO sheets lead to outstanding EMI shielding effectiveness values of 29-33 dB in the X-band, owing to the interlayer multiple reflections of the electromagnetic wave. Meanwhile, the parallel rGO sheets elevate the flexural strength by 110-130% and improve the fracture toughness by 100-130% compared with the monolithic silica by capturing and deflecting the propagating cracks. The nanolaminated structure constructed by the intercalation approach can effectively break the trade-off between mechanical properties and EMI shielding performances in the graphene/ceramic composites, thus opening up new opportunities in the lightweight and mechanically reliable EMI applications.