Well-defined Interface Research Articles

Influence of Bioactive Glass Addition on TC4 Laser Cladding Coatings: Microstructure and Electrochemical Properties

There is a growing interest in enhancing the bioactivity of TC4-based metallic biomaterials, which are known for their excellent biocompatibility. Bioactive glass (BG) has been recognized for its high potential in promoting bioactivity, particularly in osteo tissue engineering. This study focuses on investigating the influence of BG addition on the microstructure and electrochemical properties of TC4 coatings. The TC4/BG composite coatings were fabricated through laser cladding, and their microstructure was characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrochemical properties of the coatings were assessed through electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization tests in three different solutions. The results revealed that the incorporation of BG had a significant impact on the microstructure of the TC4 coatings, leading to the formation of a well-defined interface between the TC4 matrix and the BG aggregates. The distribution of BG aggregates within the TC4 matrix coating was found to be random and unrelated to the specific regions of the coating. The metallographic microstructure variations were attributed to different heat dissipation conditions during the laser cladding process. Furthermore, the electrochemical corrosion behavior of TC4/BG composite coatings reveals that they exhibit stability similar to that of passive films and good resistance against media corrosion compared to TC4, while also showing enhanced corrosion resistance in 3.5 wt% NaCl and Dulbecco’s modified Eagle medium (DMEM) solutions, indicating their potential for biomedical applications; however, the corrosion resistance decreases gradually in all solutions, potentially due to the elevated Cl− concentration. Further research can explore bioactivity enhancement of TC4/BG composite coatings and investigate the long-term stability and biological response of these coatings in diverse physiological environments.

Intrinsically Disordered Flanking Regions Increase the Affinity of a Transcriptional Coactivator Interaction across Vertebrates.

Interactions between two proteins are often mediated by a disordered region in one protein binding to a groove in a folded interaction domain in the other one. While the main determinants of a certain interaction are typically found within a well-defined binding interface involving the groove, recent studies show that nonspecific contacts by flanking regions may increase the affinity. One example is the coupled binding and folding underlying the interaction between the two transcriptional coactivators NCOA3 (ACTR) and CBP, where the flanking regions of an intrinsically disordered region in human NCOA3 increases the affinity for CBP. However, it is not clear whether this flanking region-mediated effect is a peculiarity of this single protein interaction or if it is of functional relevance in a broader context. To further assess the role of flanking regions in the interaction between NCOA3 and CBP, we analyzed the interaction across orthologs and paralogs (NCOA1, 2, and 3) in human, zebra fish, and ghost shark. We found that flanking regions increased the affinity 2- to 9-fold in the six interactions tested. Conservation of the amino acid sequence is a strong indicator of function. Analogously, the observed conservation of increased affinity provided by flanking regions, accompanied by moderate sequence conservation, suggests that flanking regions may be under selection to promote the affinity between NCOA transcriptional coregulators and CBP.

Superhydrophilic Triazine-Based Covalent Organic Frameworks via Post-Modification of FeOOH Clusters for Boosted Photocatalytic Performance.

The triazine-based covalent organic frameworks (tCOF), an intriguing subtype of COFs, are expected as highly promising photocatalysts for various photocatalytic applications owing to their fully conjugated structures and nitrogen-rich skeletons. However, the inherent hydrophobicity and fast recombination of photoexcited electron-hole pairs are two main factors hindering the application of tCOF in practical photocatalytic reactions. Here, a post-synthetic modification strategy to fabricate superhydrophilic tCOF-based photocatalysts is demonstrated by in situ growing FeOOH clusters on TaTz COF (TaTz-FeOOH) for efficient photocatalytic oxidation of various organic pollutants. The strong polar FeOOH endows TaTz-FeOOH with good hydrophilic properties. The well-defined heterogeneous interface between FeOOH and TaTz allows the photoelectrons generated by TaTz to be consumed by Fe (III) to transform into Fe (II), synergistically promoting the separation of holes and the generation of free radicals. Compared with the unmodified TaTz, the optimized TaTz-FeOOH (1%) shows excellent photocatalytic performance, where the photocatalytic degrade rate (k) of rhodamine B is increased by about 12 times, and the degradation rate is maintained at 99% after 5 cycles, thus achieving efficient removal of quinolone antibiotics from water. This study provides a new avenue for the development of COF-based hydrophilic functional materials for a wide range of practical applications.

Order release optimisation for time-dependent and stochastic manufacturing systems

Order release optimisation is essential in production planning, especially in discrete manufacturing. Order release planning models with load-dependent lead times must anticipate the time-dependent work-in-process and output for any given release schedule and thus require an anticipation model that approximates the time-dependent behaviour of queueing systems. We present a generic optimisation model for order release planning in stochastic, non-stationary manufacturing systems that includes a well-defined interface for the anticipation model. We develop two stationary backlog carryover (SBC) approaches to approximate time-dependent queueing behaviour and prove their consistency with the order release model. The resulting nonlinear programming model is shown to be a special case of the well-known clearing function models. A numerical study demonstrates that the optimised order releases for different demand patterns are close to the optimum that results from simulation-based optimisation even for extreme demand and release patterns. The resulting output closely matches the simulated output with some deviations.

Modulation of Hot Electrons via Interface Engineering of Au@ZnIn2S4/MXene for Efficient Photoelectrochemical Seawater Splitting under Visible Light

Interface engineering in hybrid plasmonic metal/semiconductor heterostructures is an efficient approach to enhance the catalytic performance of photocatalysts and photoelectrochemical cells in harvesting and converting sunlight, especially in the range of visible light. Plasmon-induced hot electron injection plays a crucial role in the transfer of plasmonic energy from a plasmonic metal to semiconductor in a plasmonic metal/semiconductor system. Herein, the efficient injection and utilization of hot electrons are achieved by fabrication of a Au@ZnIn2S4/Ti3C2 (Au@ZIS/Ti3C2) system, in which the core–shell Au@ZIS nanoparticles with well-defined interfaces are anchored on the 2D Ti3C2 surface. The core–shell Au@ZIS nanostructure is first constructed by a cation exchange reaction method. The well-defined interface of the Au core and ZIS shell optimizes the electron transfer pathway and greatly promotes the extraction of hot electrons from Au to ZIS. Furthermore, the electrons concentrated on ZIS can be further transferred to Ti3C2 owing to its excellent electron mobility and conductivity, leading to highly efficient separation and transfer of electrons through a two-step transfer process. The activities of photoelectrochemical (PEC) seawater splitting demonstrate that the integration of Au and ZIS into an optimized core–shell structure and its further modification by Ti3C2 results in a drastic improvement in PEC activity. Therefore, Au@ZIS/Ti3C2 shows the highest photocurrent density and smallest charge transfer resistance among various samples, accompanied by 6.5 and 10.8 orders of enhancement in PEC H2 evolution compared to reference samples of ZIS/Ti3C2 and Au/Ti3C2. Elaborate design and construction of core–shell plasmonic metal@semiconductor nanostructure with a well-defined interface and 2D MXene support would provide a feasible and promising method to enhance the performance of PEC seawater splitting.

Development and production of a CNC machined 420 stainless steel reinforced with Cu by hot pressing

Multi-material structures make it possible to obtain effective solutions to engineering problems by combining the benefits of different materials to meet the requirements of different working conditions. The aim of this multifunctional 420 stainless steel-copper structure is to create a hybrid solution in which copper acts as heat-transfer enhancer (through cooling channels) while maintaining the required mechanical properties of the steel matrix. This work focuses on a combined engineering process consisting of CNC machining through holes on a 420 stainless steel surface substrate and subsequent filling with copper by hot pressing. The influence of the copper filling on the physical, chemical, microstructural, mechanical, and thermal properties of this multi-material solution was analysed. The machined area (5% of the total surface area) consisted of nine holes with a diameter of approximately 1 mm. The multi-material samples showed high densification, homogeneous microstructures, and a well-defined and sharp interface between the two materials. The microhardness values measured for the 420 stainless steel and copper were 759 and 57 HV, respectively, and the thermal conductivity of the multi-material was ≅ 59% higher than the 420 stainless steel (39.74 and 16.40 W/m K, respectively).

An emissive charge-transfer excited-state at the well-defined hetero-nanostructure interface of an organic conjugated molecule and two-dimensional inorganic nanosheet.

Precise engineering of excited-state interactions between an organic conjugated molecule and a two-dimensional semiconducting inorganic nanosheet, specifically the manipulation of charge-transfer excited (CTE) states, still remains a challenge for state-of-the-art photochemistry. Herein, we report a long-lived, highly emissive CTE state at structurally well-defined hetero-nanostructure interfaces of photoactive pyrene and two-dimensional MoS2 nanosheets via an N-benzylsuccinimide bridge (Py-Bn-MoS2). Spectroscopic measurements reveal that no charge-transfer state is formed in the ground state, but the locally-excited (LE) state of pyrene in Py-Bn-MoS2 efficiently generates an unusual emissive CTE state. Theoretical studies elucidate the interaction of MoS2 vacant orbitals with the pyrene LE state to form a CTE state that shows a distinct solvent dependence of the emission energy. This is the first example of organic-inorganic 2D hetero-nanostructures displaying mixed luminescence properties by an accurate design of the bridge structure, and therefore represents an important step in their applications for energy conversion and optoelectronic devices and sensors.

Insights into the enhanced electrochemical sensing behavior of hydroquinone and catechol simultaneously enabled by ultrafine layer CoP-NiCoP heterostructure on graphene frameworks.

Hydroquinone (HQ) and catechol (CC), two major dihydroxybenzene isomers, are toxic pollutants coexisting and impeding each other in the process of sample identification. Well-defined nanostructure and interface engineering enable the optimization of electrocatalysts for constructing highly efficient electrochemical sensors to realize detection of HQ and CC simultaneously. Herein, CoP-NiCoP heterojunction nanosheet with ultrafine layer-like morphology is designed and synthesized using graphene frameworks (GFs) as supporter via a solid-state phase transformation strategy (defined as CoP-NiCoP/GFs). Notably, the CoP-NiCoP/GFs displays enhanced electrocatalytic activity toward both HQ and CC compared with CoP/GFs, NiCoP/GFs, and GFs. Density functional theory calculations prove that the CoP-NiCoP structure is more favorable for the adsorption and desorption of both HQ and CC than those of CoP and NiCoP, thus could accelerate the HQ and CC electrocatalytic oxidation reaction on CoP-NiCoP/GFs electrode. A novel electrochemical sensing platform is developed based on CoP-NiCoP/GFs for detection of HQ and CC with wide linear detection ranges and low detection limits (0.256 μM for HQ and 0.379 μM for CC). Meanwhile, the proposed sensor could effectively determine HQ and CC in actual river water. This work demonstrates the great potential of NiCo-based metal phosphide in constructing an efficient dihydroxybenzene electrochemical sensor.

Probing strongly exchange coupled magnetic behaviors in soft/hard Ni/CoFe2O4 core/shell nanoparticles.

Exchange coupling in a model core-shell system is demonstrated as a step on the path to 3d exchange spring magnets. Employing a model system of Ni@CoFe2O4, high quality core-shell nanoparticles were fabricated using a simple two-step method. The microstructural quality was validated using TEM, confirming a well-defined interface between the core and the shell. A strongly temperature dependent two-phase magnetic hysteresis loop was measured, wherein an analysis of step heights indicates coupling of roughly 50% between the core and the shell. Element-specific XMCD hysteresis confirms the presence of exchange coupling, suppressing the superparamagnetism of the Ni core at room temperature, and reaching a coercivity of >6 kOe at 80 K. These results provide a pathway to the development of heterostructured metal-oxide exchange coupled nanoparticles with improved maximum energy product.

An unusual solid state amorphization in a TiZr-base bulk metallic glass composite fabricated by laser powder bed fusion

In additively manufacturing of bulk metallic glasses (BMCs) and their composites (BMGCs), metallic glass usually forms in the molten pools and a certain crystallization occurs in the heat affected zones. In this work, we report a new phenomenon in laser powder bed fusion of BMCC, where the metastable (Ti,Zr)2Cu intermetallic compound (γ) formed in the solidification of molten pools transforms into metallic glass (MG) phase via a solid-state amorphization manner when it located in the heat affected zones during laser powder bed fusion of a Ti61.75Zr33.25Cu5 BMGC. The thermodynamic mechanisms of this solid-state amorphization are proved by the Molar Gibbs free energy - Component (Gm-X) diagram. The γ phase with the Cu content above 39.8 at.% possesses the higher Gm than the MG phase, which is thermodynamically favorable for the amorphization process. The well-defined interface between the metallic glass and the γ phase reveals a heterogeneous solid-state amorphization nature. The average micro-hardness of the (β + ω) matrix and the (γ + MG) reinforcing phases are 352.47 HV0.05 and 979.27 HV0.05, respectively. The solid-state amorphization will contribute to the increase in the hardness and the fracture toughness of the BMGC.

Design and synthesis of dispersed Ni2P/Co nano heterojunction as bifunctional electrocatalysis for boosting overall water splitting

The design of multi-components nanostructure with interface heterojunction is the cutting-edge research in recent years because the catalytic activity, stability, and durability of catalysts are highly affected by the strong electronic effects, geometric effects, and synergistic effects occurring at the interface. Based on this, an efficient bifunctional electrocatalyst embedding highly dispersed Ni2P/Co nano heterojunction at the porous hollow-out carbon shell is developed for overall water splitting through evenly epitaxial growth of ultrathin Ni2P nanosheets on Co-based ZIF-67. The distinct electron interaction between the interfacial Ni2P (300) and Co (100) effectively lowers the overpotential of OER (316 mV vs. RHE) and HER (149 mV vs. RHE) at the current density of 10 mA cm−2. Density functional theory (DFT) calculation further identifies that the Ni2P and Co heterojunctions optimize the adsorption energy of intermediate products and lower the energy barrier of the rate-determining step of OER significantly. This work provides a rational design of a well-defined interface toward overall water splitting electrocatalysts and offers a scientific basis for an in-depth understanding of the mechanism of the catalysts with nano heterojunction.

'Molecular Beam Epitaxy' on Organic Semiconductor Single Crystals: Characterization of Well-Defined Molecular Interfaces by Synchrotron Radiation X-ray Diffraction Techniques.

Epitaxial growth, often termed “epitaxy”, is one of the most essential techniques underpinning semiconductor electronics, because crystallinities of the materials seriously dominate operation efficiencies of the electronic devices such as power gain/consumption, response speed, heat loss, and so on. In contrast to already well-established epitaxial growth methodologies for inorganic (covalent or ionic) semiconductors, studies on inter-molecular (van der Waals) epitaxy for organic semiconductors is still in the initial stage. In the present review paper, we briefly summarize recent works on the epitaxial inter-molecular junctions built on organic semiconductor single-crystal surfaces, particularly on single crystals of pentacene and rubrene. Experimental methodologies applicable for the determination of crystal structures of such organic single-crystal-based molecular junctions are also illustrated.

Privacy preserving knowledge graph for healthcare applications

Knowledge graphs in healthcare applications help all the stakeholders in the healthcare domain. The doctors can consult across various hospitals for a particular scenario or can query the knowledge graph for the history of the patients. Similarly, the patients can query the knowledge graph through well-defined interface or a Chabot system for location of the nearest doctor with a high rating. The physicians can query the knowledge graph for a generic drug family or detecting salt of a particular drug. The paper proposes architecture for knowledge graph in healthcare domain. Further, privacy preserving for a medical domain is an essential requirement. The paper proposes privacy preserving schemes for knowledge graph for healthcare applications.

A computational model for interfacial heat and mass transfer in two-phase flows using a phase field method

Two-phase flows involving heat/mass transfer are widespread in industrial and environmental applications such as chemical reactors, bubbly flows, combustion, boiling, carbon sequestration, and ocean-atmosphere exchanges. It is therefore important to accurately predict the rate of heat/mass transfer across capillary interfaces via numerical simulations. Due to the absence of a well-defined interface, modeling interfacial transfer between two phases is particularly challenging for phase field (diffuse interface) models. In the context of second-order conservative phase field models, by assuming a microstructure that is consistent with the interfacial profile, we use perturbation theory and asymptotic analysis to derive interfacial heat/mass exchange terms that are consistent extensions of the underlying phase field equations. The developed two-scalar model is conservative, preserves positivity of total scalar concentration, and correctly predicts the transient and equilibrium solutions in all limits of diffusivity ratio. Additionally, we demonstrate that by assuming thermodynamic equilibrium in the microstructure, a more reduced model in the form of a one-scalar equation is derived. Several canonical and realistic simulations are presented to assess the consistency, accuracy, and convergence of the models. Crucially, while the one-scalar and two-scalar models both perform well when the two phases have comparable diffusivities, the two-scalar model is found to be much more accurate for realistic problems with large diffusivity ratios as it prevents unphysical leakage of heat/mass.

Interface effect on superlattice quality and optical properties of InAs/GaSb type-II superlattices grown by molecular beam epitaxy

We systematically investigate the influence of InSb interface (IF) engineering on the crystal quality and optical properties of strain-balanced InAs/GaSb type-II superlattices (T2SLs). The type-II superlattice structure is 120 periods InAs (8 ML)/GaSb (6 ML) with different thicknesses of InSb interface grown by molecular beam epitaxy (MBE). The high-resolution x-ray diffraction (XRD) curves display sharp satellite peaks, and the narrow full width at half maximum (FWHM) of the 0th is only 30–39 arcsec. From high-resolution cross-sectional transmission electron microscopy (HRTEM) characterization, the InSb heterointerfaces and the clear spatial separation between the InAs and GaSb layers can be more intuitively distinguished. As the InSb interface thickness increases, the compressive strain increases, and the surface “bright spots” appear to be more apparent from the atomic force microscopy (AFM) results. Also, photoluminescence (PL) measurements verify that, with the increase in the strain, the bandgap of the superlattice narrows. By optimizing the InSb interface, a high-quality crystal with a well-defined surface and interface is obtained with a PL wavelength of 4.78 μm, which can be used for mid-wave infrared (MWIR) detection.

Side-by-side design of bi-component heterojunction nanofibers for high-performance gas sensors: Improvement in synergistic effect

Heterojunctions are often introduced into gas sensor electrodes due to they can lower the working temperature and increase response rate during gas-sensing detection. However, many reported core–shell structured heterojunctions show a bad synergistic enhancement effect from both components. Here, a type of side-by-side bi-component heterojunction nanofibers of NiO/In2O3 (INO SBHNFs) was designed by the self-made V-channel electrospinning technique. Results showed that these SBHNFs are comprised of two component NFs that attach together side-by-side with a well-defined interface. And the sensors based on INO-10 SBHNFs show the highest response of 210 to 100 ppm ethanol at 260 °C, which is an order of magnitude higher than all those of the ones based on the In2O3 and INO-10-C NFs. Moreover, the INO-10 SBHNF sensors also show a high response recovery rate (4 s/36 s) and a low limit of detection (<200 ppb). Further analysis indicates that this side-by-side design can totally utilize the heterojunctions’ motivation and the solid solution’s enhancement on the formation of depletion layer (including the transfer of electrons), and the synergistic enhancement effect from both components and their surface. Besides, the sensors based on INO SBHNFs also show a good selectivity, as well as a high long-term stability.

Covalent Organic Frameworks: Chemistry of Pore Interface and Wall Surface Perturbation and Impact on Functions

ConspectusPorous structures are ubiquitous, discovered in nature ranging from biological channels in animals and plants to various pores in sediments and minerals and playing vital roles in maintaining biological activities and ecosystems. Synthetic pores have been known for over 100 years and currently continue to be a central subject in the fields of chemistry, physics, materials science, and technology. A fundamental key issue is how to develop specific functions with pores. Pores are determined by three parameters, including pore shape, size, and environment; how to design these parameters in a controlled manner is a key subject. Covalent organic frameworks (COFs) are a distinct class of crystalline porous polymers as they combine covalent and noncovalent chemistries to result in long-range-ordered polygonal skeletons and discrete pores. The topological diagram─the principle for designing COFs─enables the predesign of not only skeletons but also pores, offering a powerful molecular platform for constructing tailor-made organic/polymeric materials. Over the past decade, progress in chemistry has greatly enhanced our capability to synthesize COFs to achieve different structures. Especially, the pores in COFs are constructed with lightweight elements, covalent bonds, and organic components, which offer numerous combinations to design and synthesize pore shapes, sizes, and interfaces. These parameters control the interplay with guest molecules and ions to determine the property and function of pores. Among various synthetic porous materials, COFs are unique in that these pore parameters are topologically designable and synthetically controllable. Two complementary strategies, i.e., topology diagram and pore surface engineering, have been developed for pore chemistry, in which the first one emphasizes the in situ approach to design and control pores and the second one highlights the postsynthetic way to tune the pore structures finely yet precisely. These two different chemistries offer individual ways to explore different pores, properties, and functional materials and systems. Looking at the features of COFs, a basic common structure of the pores is the well-defined pore interface, which is constituted by aligned surface atoms and side units at a proximate distance along the pore long-axial direction and distributed periodically over the pores. These features of pore interfaces are specific to COFs and predetermine their functions. In this Account, we scrutinize the chemistry of pore interfaces by focusing on the pore shape, pore size, and aligned atoms and units on pore walls to design unique properties and functions. We highlight pore wall perturbation with surface atoms and side units to demonstrate their decisive roles in structural formation and functional expression. We summarize perspectives, key issues to be addressed, and opportunities with the aim of showing a promising way to next-stage materials and functional designs.

Self-Assembly of 2D Hybrid Double Perovskites on 3D Cs2 AgBiBr6 Crystals towards Ultrasensitive Detection of Weak Polarized Light.

We report the self-assembly of 2D double perovskite (BLA)2 CsAgBiBr7 (BLA=benzylammonium) on 3D Cs2 AgBiBr6 crystals, providing the first demonstration of polarization-sensitive photodetection using lead-free double perovskite heterocrystals (HCs). The (BLA)2 CsAgBiBr7 /Cs2 AgBiBr6 HC successfully combines the anisotropy of 2D double perovskites with the well-defined interface provided by heterogeneous integration. Driven by the built-in electric field in junction, photodetectors of HCs exhibit unique polarization dependence of zero-bias photocurrent with a large anisotropy ratio up to 9, which is 6 times amplified as compared to the pristine 2D (BLA)2 CsAgBiBr7 . More importantly, the present devices can remain polarization-sensitive with incident light intensity down to the nW cm-2 level. Our study on lead-free hybrid perovskite HCs marks a step toward establishing robust material foundations for fundamental scientific investigations and the development of optoelectronic devices.

Controlling the Cation Exsolution of Perovskite to Customize Heterostructure Active Site for Oxygen Evolution Reaction.

Perovskite oxides are an important class of oxygen evolution reaction (OER) catalysts offering an ordered atomic arrangement and a highly flexible electronic structure. Currently, understanding and adjusting the dynamic reconstruction of perovskite during the OER process remains a formidable challenge. Here, we report the artificial construction of a heterostructure by the cation exsolution of perovskite to control the active site formation and reconstruction. The deliberately made La deficiency in LaNiO3 perovskite facilitates the original segregation of NiO from the parent matrix and forms a well-defined interface between perovskite parent and NiO exsolution phase. The dynamic formation process of such heterojunction was studied by density functional theory computation and high quality imaging characterization. Due to the valence redistribution of Ni ions caused by the interfacial electron transfer, the in situ formed LaNiO3/NiO heterostructure displays high electroactivity. Therefore, the LaNiO3/NiO heterostructure exhibits a dynamic surface evolution feature with the generation of the highly active NiOOH layer under a low anodic potential (∼1.35 V vs RHE) during the OER process, which is very different from the conventional LaNiO3 with a stoichiometry and NiO catalysts. With the newly formed heterostructure, the reconstructed catalysts impart a 4.5-fold increase in OER activity and a 3-fold improvement in stability against La and Ni dissolution during the OER process. This work provides a feasible interface engineering strategy for artificially controlling the reconstruction of the active phase in high-performance perovskite-based electrocatalytic materials.

Boosting the Ion Mobility in Solid Polymer Electrolytes Using Hollow Polymer Nanospheres as an Additive.

Solid polymer electrolytes (SPEs) possess improved thermal and mechanical stability as safe energy storage devices. However, their low ion mobilities and poor electrochemical stabilities still hinder the wide industrial application of SPEs. Herein, we introduce an SPE design that provides an enormous number of electrochemically stable pathways and space for lithium-ion transport, blending polymer (polydopamine) hollow nanospheres with an inactive inorganic template into a poly(ethylene oxide) (PEO) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) based SPE. Hollow silica acts as a template for polydopamine processing a large contact area with the polymer electrolyte, and the interface between the polymer electrolyte and hollow composite fillers provides amounts of ion transport channels. In addition, theoretical calculations reveal a strong adsorption between polydopamine and TFSI-, which suppresses the TFSI- motion and meanwhile facilitates the selective Li+ transport. The hollow polydopamine can serve as a versatile platform for anion trapping and has large compatible and stable depression for a well-defined ion transfer interface layer, forming a three-in-one nanocomposite for the enhancement of ionic conductivity with no sacrifice of the mechanical properties. Experimental data confirmed the high mobility of ions within the composite electrolyte with an ionic conductivity of 0.189 mS cm-1 in comparison to the SPE without additives (0.105 mS cm-1) at 60 °C. The mobility of the Li+ increases after adding the polymer-coated inorganic additives, associated with a noticeable enlargement of the electrochemical window. Furthermore, an all-solid-state Li/LiFePO4 battery with a hollow polydopamine nanoparticle-polymer composite electrolyte shows long life, high reversible capacity (134.9 mAh g-1), and high capacity retention (97.2%) after 205 cycles at 0.2 C.