Poor Interfacial Properties Research Articles

Performance Comparison of CdTe:Na, CdTe:As, and CdTe:P Single Crystals for Solar Cell Applications.

We compared thermal stability, open-circuit voltage, short-circuit current, and fill factor values of single-crystal Cadmium telluride (CdTe) grown using the vertical Bridgman (VB) technique and doped with group V elements (phosphorus and arsenic), and group Ⅰ element (sodium), followed by an annealing process. The sodium-doped CdTe maintained a hole density of 1016 cm−3 or higher; after annealing for a long time, this decreased to 1015 cm−3 or less. The arsenic-doped CdTe maintained a hole density of approximately 1016 cm−3 even after the annealing process; however its bulk minority carrier lifetime decreased by approximately 10%. The phosphorus-doped CdTe maintained its properties after the annealing process, ultimately achieving a hole density of ~1016 cm−3 and a minority carrier lifetime of ~40 ns. The characteristics of a single-crystal solar cell were evaluated using a solar cell device that contained single-crystal CdTe with various dopants. The sodium-doped sample exhibited poor interfacial properties, and its performance decreased rapidly during annealing. The samples doped with group V elements exhibited stable characteristics even during long-term annealing. We concluded, therefore, that group V elements dopants are more suitable for CdTe single-crystal-based solar cell applications involving thermal stress conditions, such as space missions or extreme fabrication temperature environments.

Methylammonium Compensation Effects in MAPbI3 Perovskite Solar Cells for High-Quality Inorganic CuSCN Hole Transport Layers.

Recent studies have demonstrated that copper (I) thiocyanate (CuSCN) has huge potential as a hole extraction material (HEM) for perovskite solar cells. Here, we used CuSCN as a HEM and analyzed its relationships with a methylammonium lead iodide (MAPbI3) perovskite layer. The CuSCN dissolved in diethyl sulfide (DES) was spin-coated on the MAPbI3 layer. For high-quality and dense CuSCN layers, post-annealing was carried out at various temperatures and times. However, the unwanted dissociation of MAPbI3 to PbI2 was observed due to the post-annealing for a long time at elevated temperatures. In addition, DES, which is used as a CuSCN solvent, is a polar solvent that damages the surface of MAPbI3 perovskites and causes poor interfacial properties between the perovskite layer and HEM. To solve this problem, the effect of the molar ratio of methylammonium iodide (MAI) and PbI2 in the MAPbI3 precursor solution was investigated. The excess MAI molar ratio in the MAPbI3 precursor solution reduced MAPbI3 surface damage despite using DES polar solvent for CuSCN solution. In addition, dissociation of MAPbI3 to PbI2 following an adequate post-annealing process was well suppressed. The excess MAI molar ratio in the MAPbI3 precursor could be compensated for the MA loss and effectively suppress phase separation from MAPbI3 to MAI + PbI2 during post-annealing. The efficiency based on the normal planar structure of CuSCN/MAPbI3 (using excess MAI)/TiO2 was approximately 17%. The CuSCN-based MAPbI3 device shows more optimized stability than the conventional spiro-OMeTAD under damp heat (85 °C and 85% relative humidity) conditions because of the robust inorganic HEM.

Magnetic graphene oxide/carbon fiber composites with improved interfacial properties and electromagnetic interference shielding performance

The poor interfacial properties of carbon fiber reinforced composites (CFRPs) limit their important applications in the aerospace industry. To address the shortcoming, magnetic graphene oxide (MGO) was prepared and encapsulated on the surface of carbon fibers to improve the interfacial properties of CFRPs. The existence of Fe3O4 on MGO reduced the agglomeration of graphene oxide, which made rapid and controlled sizing possible while still maintaining a good level of dispersion of MGO in the magnetic field. Results showed that the interlaminar shear strength, the interfacial shear strength, and the transverse fiber bundle tensile strength of the MGO treated CFRPs were 56.04%, 46.73%, and 82.00% higher than the untreated CFRPs, respectively. Meanwhile, MGO treated CFRPs achieved an electromagnetic interference (EMI) shielding effectiveness as high as 46.33 dB in X-band. This work provided insights into preparing structural–functional integrated CFRPs, which showed potential applications in the fields of aerospace, aeronautics, automotive among others.

Enhanced interfacial shear strength in ultra-high molecular weight polyethylene epoxy composites through a zinc oxide nanowire interphase

The mechanical properties of fiber-reinforced composites are largely dictated by fiber-matrix interactions, where a well-adhered interface is desired. Ultra-high molecular weight polyethylene (UHMWPE) fibers suffer from poor interfacial properties due to their smooth and inert surface. Therefore, enhancing the interfacial properties of such composites will lead to an increased use in structural applications where high modulus, tenacity, low density, high impact and abrasion resistance properties are needed. In this work, an interfacial modification process consisting of an oxygen plasma surface functionalization followed by the grafting of zinc oxide nanowires (ZnO NWs) onto the UHMWPE fiber surface is investigated to improve the fiber-matrix interaction in UHMWPE composites. The UHMWPE fiber surface is subjected to varying oxygen plasma treatment durations such that the surface oxygen content can be increased to improve ZnO NW adhesion. Through single fiber pullout testing, the interfacial shear strength (IFSS) of oxygen plasma functionalized and ZnO NW coated UHMWPE fibers was shown a maximum increase of 135% with a 30 s plasma treatment prior to ZnO NWs. This increase in IFSS is attributed to an increased surface area interaction and mechanical interlocking between the fiber and matrix. The results detailed in this work demonstrate a benign, simple, and effective way to significantly improve the interfacial properties of UHMWPE fiber reinforced composites.

Improvement of mechanical and interfacial properties of hot water and sodium bicarbonate treated jute fibers for manufacturing high performance natural composites

AbstractUses of natural fibers in the field of composites are often restricted by their poor mechanical and interfacial properties. Fiber constitutions have significant influence over both of these properties. Traditional alkali treatment is mainly used to solve this problem which is not environmentally friendly and also not cost effective. A cost effective, less hazardous and sustainable sodium bicarbonate chemical treatment has been used as an alternative of traditional mercerization on jute fibers with an objective of manufacturing high‐performance natural fiber composites. Jute fibers were hand combed and treated with hot water and bicarbonate (5% and 10%) and further reinforced with epoxy resin to make composites. The mechanical characterizations of jute fiber were carried out using single fiber tensile tests; reliability analysis of the experimental data was performed. Interfacial adhesion of jute fiber with an epoxy matrix was investigated by using single fiber pull‐out techniques. The mechanical behavior of jute fiber/epoxy composites was studied by flexural testing. FTIR analysis indicates that sodium bicarbonate treatment can progressively remove hemicellulose and reduce the content of lignins present in the fiber. The results also showed that a 10% sodium bicarbonate concentration increased the tensile properties of jute fiber, enhanced the interfacial shear strength and flexural properties of jute/epoxy composites.

Understanding the Electrolytes of Lithium−Sulfur Batteries

AbstractLithium‐sulfur batteries have been identified as an ultimate successor to lithium‐ion batteries due to their unique properties such as extremely high theoretical specific capacity (1672 mAh g−1), low cost, abundance of elemental sulfur on earth's crust and environmental friendliness. However, the insulating nature and volume expansion (approximately 76 %) of elemental sulfur, shuttling of polysulfides between the two electrodes and poor interfacial properties of lithium metal anode with non‐aqueous liquid electrolytes still hinder the commercialization of this system. In order to mitigate the shuttling of polysulfides between two electrodes, several strategies have been adopted, including optimizing the compositions, lithium salt and additives of non‐aqueous liquid electrolytes, and replacing the non‐aqueous liquid electrolyte with ionic liquids (ILs), solid polymers, superionic conductors, and quasi‐solid‐state electrolytes. This review article comprehensively covers the architecture, working principles of lithium‐sulfur batteries, the state‐of‐the‐art electrolytes, their types, properties, advantages, and limitations. The importance of electrolyte additives in enhancing the safety issues of lithium‐sulfur batteries is also emphasized. Here, we provide an overview of recent developments in different types of electrolytes for lithium‐sulfur batteries, focusing on electrochemical properties, and more specifically discussing issues related to polysulfide shuttles.

Surface Modification of Basalt Fibres with ZnO Nanorods and Its Effect on Thermal and Mechanical Properties of PLA-Based Composites.

The composites based on basalt fibres and poly(lactic acid) (PLA) show promising applications in biomedical and automotive fields, but their mechanical performance is still largely hindered by poor interfacial properties. Zinc oxide nanorods have been successfully used to tune the PLA/basalt fibre interface by growing them on commercially available basalt fabrics. The hierarchical fibres significantly enhanced the mechanical properties of PLA-based composites, especially their flexural strength and stiffness. These values are 26% and 22% higher than those of unmodified basalt/PLA composites, and 24% and 34% higher than those of glass/PLA composites used as a baseline. The increase in tensile and flexural properties hinges on the mechanical interlocking action promoted by ZnO nanorods and on the creation of a compact transcrystallinity structure. A degradation of PLA matrix was detected but it was positively counteracted by the better interfacial stress transfer. This study offers a novel approach for modifying the fibre–matrix interface of biocomposites intended for high-performance applications.

BaTiO3-g-GO as an efficient permselective material for lithium–sulfur batteries

Li–S batteries can replace the current LIBs due to its high specific capacity, low cost, and environmental benignity. Yet, the poor conductivity of sulfur, polysulfide shuttling and poor interfacial properties of lithium impede their commercialization.

Exploring the Interfacial Chemistry between Zinc Anodes and Aqueous Electrolytes via an In Situ Visualized Characterization System.

Direct monitoring of dendrite growth, hydrogen evolution, and surface passivation can enrich the chemical and morphological understanding of the unstable Zn/electrolyte interface and provide guidelines for rational design of Zn anodes; however, the on-line observation with high precision is hitherto lacking. Herein, we present a real-time comprehensive characterization system, including in situ atomic force microscopy, optical microscopy, and electrochemical quartz crystal microbalance (referred to as the "3M" system), to provide multiscale views on the semisphere nuclei and growth of bump-like dendrites and the potential-dependent chemical and morphological structures of passivated products in a mild acidic electrolyte. It is revealed that the poor interfacial properties can be attributed to the sparse nucleation sites and direct contact of Zn with the electrolyte. The 3M system further visualizes and confirms that the additive polyethylene glycol acts as a Zn2+ distribution promoter and physical barrier and merits stable electrochemical performance.

Analisis Pengaruh Konsentrasi Natrium Hidroksida terhadap Sifat Mekanik Biokomposit Berpenguat Serat Sisal

The mechanical properties of natural fibers are continuous development as the alternatively synthetic fibers because of the natural fibers are non-corrosive, lightweight, and environmental advantages. However, these fibers have poor interfacial adhesion properties as the fibers if used as bio-composite material. This problem can be solved by the surface modification method by the sodium hydroxide treatment used to improve the mechanical properties. A sodium hydroxide concentration which it used at 0 wt%, 5 wt%, 10 wt%, and 15 wt% and the sisal fibers were soaked in that a concentration for 2 hours. Furthermore, the bio-composite fabrication is conducted by hand lay-up technique which is using both sisals as the fibers and epoxy resin as the matrix. The tensile test RTG-1250 results show that the maximum mechanical properties, such as strains, Young's modulus, and elongation, was obtained at sodium hydroxide 5 wt% than others where the values of these mechanical properties were 25.334 MPa, 16.111 GPa, and 1.572%, respectively. The morphological evaluation carried out using a scanning electron microscope showed that the alkali sodium hydroxide treatment was improved interfacial adhesion between fiber and matrix. Finally, sodium hydroxide alkali treatment of more than 5% can be able to sisal fiber cracks so that the mechanical properties of bio-composite can decrease continuously.

Optimized ion-conductive pathway in UV-cured solid polymer electrolytes for all-solid lithium/sodium ion batteries

Solid electrolyte-based lithium-ion batteries (LIBs) have enormous potential to replace conventional LIBs with flammable liquid electrolytes. However, most solid electrolytes show low ionic conductivity and poor interfacial properties with electrodes, preventing them from reaching the level of conventional liquid electrolyte systems with separators. Herein, we optimized the formation of an ion-conductive pathway in a UV-cured solid polymer electrolyte (USPE) via a semi-interpenetrating polymer network with a minimal liquid content. The USPE consists of a UV-curable hard matrix (trimethylolpropane ethoxylate triacrylate, ETPTA) as a backbone film with negligible ionic conductivity and an optimized ionic channel with an ion-solvated gel polymer (Li+/PVdF-HFP) with a minimal liquid content for boosting the Li+ conduction. The hybrid solid-state film provides high ionic conductivity (up to 85%) relative to commercial liquid electrolyte systems and a stable electrochemical window. We also applied the same USPE with Na+ for solid electrolyte-based sodium ion batteries, and similar positive effects were also observed. Going another step forward, both the PVdF-HFP/ETPTA ratio and the HFP content in the PVdF-HFP are critical gel polymer additives for generating reinforced Li+ ion pathways in USPE.

Ductile keratin/deacetylated chitin composites with nanoparticle-induced formation of ordered and entangled structures

Highly ductile and wet-durable bio-composites from keratin reinforced by chitin-nanoparticles with engineered deacetylation have been developed. Though featuring good biodegradability and biocompatibility, poultry-feather-extracted keratin-based composites usually suffered from poor ductility and moisture stabilities because of poor interfacial properties, limited recovery of ordered protein structures and crosslinkages. In this work, chitin-nanoparticles with engineered deacetylation were used to reinforce keratin. Via engineered deacetylation, chitin-nanoparticles not only improved interfacial interactions but also formed crosslinkages with keratin. As a result, ordered keratin structures with high degree of entanglement in composites were substantially formed without addition of any coupling agents. Furthermore, engineered deacetylation for chitin could adjust the wet performance of composites via control of hydrophilicity of matrix and reinforcements. Via control of regularity and hydrophilicity of molecules by chitin-nanoparticles, mechanical properties and wet performance of keratin-based composites can be substantially improved. Reinforced keratin composites had a 230%, 260%, 540% increase in breaking strain, breaking stress and ductility, respectively as well as 94% weight retention after immersed in water for 1 week.

Reinforcing effect of hybrid nano-coating on mechanical properties of basalt fiber/poly(lactic acid) environmental composites

Basalt fiber (BF) reinforced poly(lactic acid) (PLA) composites have promising applications in biomedical and automotive industries, but their mechanical performances are still largely restricted by poor interfacial properties between BFs and PLA. To this end, we develop a flexible/rigid hybrid nano-coating technology for fiber surface modification to improve the interfacial properties between BFs and PLA. An improved vacuum assisted prepreg process (VAPP) is proposed to prepare the high-performance modified BF/PLA composites. The SiO2 nanoparticles and poly(ε-caprolactone) (PCL) polymer are designed as rigid and flexible phases, respectively, in hybrid nano-coating. The hybrid coating with a more rigid phase on the BFs can significantly enhance the mechanical properties of BF/PLA composites, especially their tensile strength and interlaminar fracture toughness. These values are approximately 29% and 110% higher, respectively, than those of unmodified BF/PLA composites. The increase in tensile strength results from a higher efficiency and continuous stress transfer derived from the flexible/rigid interfacial structure. An enhanced interlaminar fracture toughness is attributed to more dissipated energy due to the matrix yielding and crack deflecting at the interface induced by a large deformation of flexible PCL and crack pinning of SiO2 nanoparticles, respectively. Furthermore, the modified BF/PLA composites with hybrid coatings of 1 wt% coating concentration exhibit optimal mechanical properties. This work provides a novel strategy for modifying the fiber-matrix interface to produce high-performance fiber-reinforced polymer composites.

Fe3O4-seated rGO–sulfur complex as a potential cathode material for lithium–sulfur batteries

Lithium–sulfur battery has been proposed as a futuristic energy storage system owing to its positive aspects such as high theoretical specific energy density, less expensive, large availability of elemental sulfur, and better safety. Nevertheless, Li–S batteries have not come to the market for commercialization which is mainly attributed to the limitations such as the insulating nature of orthorhombic sulfur, undesirable polysulfide crossover between the electrodes, and poor interfacial properties between lithium anode and electrolytes. In order to solve these issues, several attempts have been made by researchers around the world. In the present work, in order to restrict polysulfide crossover and to promote the conductivity of elemental sulfur, Fe3O4-seated rGO–sulfur complex is prepared and used as cathode. The Li–S cell delivers a discharge capacity of 1400 mAh g−1 at 0.1 C-rate on its first cycle and a steady discharge capacity is attained at 0.5 C-rate. In the composite cathode, every element works for a particular reason: the added rGO enhances the conductivity of cathode, while Fe3O4 confines polysulfides appreciably as evidenced by TEM and XPS analyses. The self-discharge of the cell is also reduced. The variations of electrolyte resistance (Rs), interfacial resistance (Ri), and charge transfer resistance (Rct) for various depth of discharge (DOD) and state of charge (SOC) are systematically analyzed by electrochemical impedance spectroscopy.

Recent research progress of ferroelectric negative capacitance field effect transistors

Ferroelectric negative capacitance field effect transistors(Fe-NCFETs) can break through the so-called “Boltzmann Tyranny” of traditional metal oxide semiconductor field effect transistors and reduce the subthreshold swing below 60 mV/dec, which could greatly improve the on/off current ratio and short-channel effect. Consequently, the power dissipation of the device is effectively lowered. The Fe-NCFET provides a choice for the downscaling of the transistor and the continuation of Moore’s Law. In this review, the representative research progress of Fe-NCFETs in recent years is comprehensively reviewed to conduce to further study. In the first chapter, the background and significance of Fe-NCFETs are introduced. In the second chapter, the basic properties of ferroelectric materials are introduced, and then the types of ferroelectric materials are summarized. Among them, the invention of hafnium oxide-based ferroelectric materials solves the problem of compatibility between traditional ferroelectric materials and CMOS processes, making the performance of NCFETs further improved. In the third chapter, the advantages and disadvantages of Fe-NCFETs with MFS, MFIS and MFMIS structures are first summarized, then from the perspective of atomic microscopic forces the “S” relationship curve of ferroelectric materials is derived and combined with Gibbs free energy formula and L-K equation, and the intrinsic negative capacitance region in the free energy curve of the ferroelectric material is obtained. Next, the steady-state negative capacitance and transient negative capacitance in the ferroelectric capacitor are discussed from the aspects of concept and circuit characteristics; after that the working area of negative capacitance Fe-NCFET is discussed. In the fourth chapter, the significant research results of Fe-NCFETs combined with hafnium-based ferroelectrics in recent years are summarized from the perspective of two-dimensional channel materials and three-dimensional channel materials respectively. Among them, the Fe-NCFETs based on three-dimensional channel materials such as silicon, germanium-based materials, III-V compounds, and carbon nanotubes are more compatible with traditional CMOS processes. The interface between the channel and the ferroelectric layer is better, and the electrical performance is more stable. However, thereremain some problems to be solved in three-dimensional channel materials such as the limited on-state current resulting from the low effective carrier mobility of the silicon, the small on/off current ratio due to the leakage caused by the small bandgap of the germanium-based material, the poor interfacial properties between the III-V compound materials and the dielectric layer, and the ambiguous working mechanism of Fe-NCFETs based on carbon nanotube. Compared with Fe-NCFETs based on three-dimensional channel materials, the Fe-NCFETs based on two-dimensional channel materials such as transition metal chalcogenide, graphene, and black phosphorus provide the possibility for the characteristic size of the transistor to be reduced to 3 nm. However, the interface performance between the two-dimensional channel material and the gate dielectric layer is poor, since there are numerous defect states at the interface. Furthermore, the two-dimensional channel materials have poor compatibility with traditional CMOS process. Hence, it is imperative to search for new approaches to finding a balance between device characteristics. Finally, the presently existing problems and future development directions of Fe-NCFETs are summarized and prospected.

Li2CO3: A Critical Issue for Developing Solid Garnet Batteries

Solid garnet electrolytes are promising solid-state electrolytes because of their favorable ionic conductivity and high stability against Li metal anodes. However, their special surface chemistry greatly affects the practical applications whether in the form of garnet ceramic electrolytes (GCEs) or polymer/garnet electrolytes (PGEs). Even though large-scale production of garnet in an ambient atmosphere is possible, the passivated surface due to air exposure can lead to poor interfacial properties of GCEs with electrodes and low ionic conductivities of PGEs. Understanding the effects of air exposure on garnet structure stability, ion mobility, and interfacial configuration is crucial for better applications of solid garnet electrolytes. In this Perspective, we comprehensively recapitulate the reaction mechanisms and influencing factors of air-induced contaminations. Various surface engineering strategies tailoring garnet particles and/or pellets are reviewed. This Perspective provides insightful guidelines...

Synthesis of self-assembled micro/nano structured manganese carbonate for high performance, long lifespan asymmetric supercapacitors and investigation of atomic-level intercalation properties of OH− ions via first principle calculation

Abstract Recent advances in the development of manganese carbonate (MnCO3) have opened up new attractive electrode material for supercapacitor applications. However, limited internal specific capacitance and long cycle stability of MnCO3 due to its low electrical conductivity, poor interfacial properties and simple geometric configurations need to be further improved. Development of smart micro-nano architecture for electrode materials preparation is a critical challenge nevertheless it provides high specific capacitance, rich rate capability and long cycle stability. To achieve this, the facile strategy has been adopted to synthesis self-assembled micro-nano architecture of MnCO3 via simple co-precipitation, microwave and hydrothermal-assisted methods. The proposed first principle calculation study confirmed the weak interaction behaviour between OH− and MnCO3 and tiny volume expansion of unit cell are favourable for rapid charging mechanism and high rate performance. The optimised complex grain growth of 3D MS/NCs MnCO3 electrode delivered an ultrahigh specific capacitance of 302.47 F g−1, high rate capability and long cycle stability. Moreover, an asymmetric supercapacitor is employed in as-prepared 3D MS/NCs MnCO3 as positive electrode and activated carbon as negative electrode which exhibits high specific energy of 18.07 W h kg−1, power density of 7498 W kg−1 and superior capacitance retention of 98.79% even after 10,000 cycles. From these results, we concluded that the self-assembled micro-nano structures are preferred as the future promising electrode architecture for supercapacitors.

Incorporating Solvate and Solid Electrolytes for All‐Solid‐State Li2S Batteries with High Capacity and Long Cycle Life

AbstractThe development of all‐solid‐state lithium–sulfur batteries is hindered by the poor interfacial properties at solid electrolyte (SE)/electrode interfaces. The interface is modified by employing the highly concentrated solvate electrolyte, (MeCN)2−LiTFSI:TTE, as an interlayer material at the electrolyte/electrode interfaces. The incorporation of an interlayer significantly improves the cycling performance of solid‐state Li2S batteries compared to the bare counterpart, exhibiting a specific capacity of 760 mAh g−1 at cycle 100 (330 mAh g−1 for the bare cell). Electrochemical impedance spectroscopy shows that the interfacial resistance of the interlayer‐modified cell gradually decreases as a function of cycle number, while the impedance of the bare cell remains almost constant. Cross‐section scanning electron microscopy (SEM)/ energy dispersive X‐ray spectroscopy (EDS) measurements on the interlayer‐modified cell confirm the permeation of solvate into the cathode and the SE with electrochemical cycling, which is related to the decrease in cell impedance. In order to mimic the full permeation of the solvate across the entire cell, the solvate is directly mixed with the SE to form a “solvSEM” electrolyte. The hybrid Li2S cell using a solvSEM electrolyte exhibits superior cycling performance compared to the solid‐state cells, in terms of Li2S loading, Li2S utilization, and cycling stability. The improved performance is due to the favorable ionic contact at the battery interfaces.

Ultrahigh Performance of Nanoengineered Graphene-Based Natural Jute Fiber Composites.

Natural fibers composites are considered as a sustainable alternative to synthetic composites due to their environmental and economic benefits. However, they suffer from poor mechanical and interfacial properties due to a random fiber orientation and weak fiber–matrix interface. Here we report nanoengineered graphene-based natural jute fiber preforms with a new fiber architecture (NFA) which significantly improves their mechanical properties and performances. Our graphene-based NFA of jute fiber preform enhances the Young modulus of jute–epoxy composites by ∼324% and tensile strength by ∼110% more than untreated jute fiber composites, by arranging fibers in a parallel direction through individualization and nanosurface engineering with graphene derivatives. This could potentially lead to manufacturing of high-performance natural alternatives to synthetic composites in various stiffness-driven applications.

Enhanced interfacial strength of aramid fiber reinforced composites through adsorbed aramid nanofiber coatings

Aramid fibers are well-known for their excellent tensile properties and low density but are limited in composite applications due to their inert surface which leads to poor interfacial properties. One method that has shown promise in recent years is the application of nanoscale reinforcements to the surface of the fibers to improve mechanical interaction with the matrix. With aramid fibers, it is ideal to perform an interfacial reinforcement utilizing the dense hydrogen bonding which is responsible for the fibers strength. Here, it is demonstrated that recently developed aramid nanofibers (ANFs) can adsorb onto the surface of macroscale aramid fibers to enhance the interfacial properties through mechanical interlocking with the matrix. A simple and rapid dip-coating process is used to deposit the ANFs on the aramid fiber surface. These ANFs bond with the fiber through physisorption and hydrogen bonding, yielding a 70.27% increase in interfacial shear strength and a 25.6% increase in short beam shear strength in composites prepared by dip-coating unidirectional tape into a solution of ANFs. Notably, the interfacial gains are made while fully preserving the strength of the aramid fiber following the treatment, therefore ensuring in-plane properties of the composite are maintained. This work shows that the introduction of an ANF interphase may present a novel and convenient method to improve the interfacial strength of aramid reinforced composites, enabling cost-effective and simplified production of stronger structural materials.