Layered Nanosheets Research Articles

Synthesis and Fast Exfoliation of Layered GeP Nanosheets for Advanced Li-Ion Batteries

Synthesis and Fast Exfoliation of Layered GeP Nanosheets for Advanced Li-Ion Batteries

Magnetically separable ZnFe2O4 grafted g-C3N4/rGO ternary nanocomposites for enhanced photo-Fenton catalytic activity under visible light

Ternary nanocomposites (TNCs) comprising layered functional materials with favorable band edge positions have been strategically employed to suppress the photogenerated carrier recombination and augment photocatalytic performance by harnessing the entire UV–visible–near infrared broadband spectrum. Utilizing the intrinsic magnetic properties of the co-catalysts, a series of easily separable and recyclable g-C3N4/rGO/ZnFe2O4 (CNGZF) TNCs were developed by modulating g-C3N4 mass fraction. The heterogeneous photo-Fenton performances of the TNCs were evaluated in the discoloration of methylene blue with/ or without H2O2 under visible light. The photocatalytic efficacy of TNCs with a mass ratio of 2:1:1 (i.e., 2-CNGZF) surpasses the individual merits of their counterparts, g-C3N4 and ZnFe2O4 by 11.08 and 2.91 times, respectively, and binary composite CNZF (g-C3N4/ZnFe2O4) by 2.34 times in dye degradation. In the presence of H2O2, the highest removal efficiencies of more than 93% (k = 0.0442 min−1) and 97% (k = 0.1922 min−1) were achieved within 60 min and 20 min under artificial visible light and solar irradiation, respectively. Controlling various operational parameters of the reaction medium, a remarkable improvement in the rate constant up to 0.229 min−1 was obtained for 15 mg of catalysts loading using an H2O2 concentration of 0.15 M at pH 7. The enhanced photocatalytic performances are corroborated by a large number of induced active sites, resulting from special dimension effects of the layered nanosheets, broadband absorption capabilities of the co-catalysts, and accelerated electron migration through the metallic counterparts. Electrochemical impedance spectroscopy measurements further confirm the lower interfacial charge transfer resistance and prolonged lifetime of electrons in the TNCs. Furthermore, the moderate magnetic properties of the co-catalysts ease the catalyst recovery process, exhibiting excellent stability and durability even after recycling up to four successive runs.

Enhancement of thermoelectric power factor via electron energy filtering in Cu doped MoS2 on carbon fabric for wearable thermoelectric generator applications

The design and construction of state-of-the-art wearable thermoelectric materials are important for the development of self-powered wearable thermoelectric generators (WTEGs). Molybdenum disulfide (MoS2) has been reported as a noteworthy thermoelectric (TE) material because of its large intrinsic bandgap and high carrier mobility. In this work, Cu-doped two-dimensional layered MoS2 nanosheets were grown on carbon fabric (CF) via a hydrothermal method. The electrical conductivity, Seebeck coefficient, and power factor for the Cu-doped MoS2 were found to increase with increasing temperature. The maximum Seebeck coefficient was obtained for a MoS2 sample doped with 4 at% of Cu (CM4) was ∼10 μV/K at 303 K and ∼13 μV/K at 373 K. The enhancement in the Seebeck coefficient was attributed to an energy-filtering effect caused by the interfacial barrier between MoS2 and Cu. In addition, a thermoelectric device was designed with four pairs of TE materials, where CM4 (4 at%) was used as a p-type material and Cu wire was used as an n-type material. These p- and n-type materials were connected electrically in series and thermally in parallel to generate a voltage of 190.7 μV at a temperature gradient of 8 K.

Carbothermal-reduction-assisted CVD synthesis of layered MoS2 nanosheets on activated carbon support: Implication for photocatalysis

The photocatalytic activity of MoS2-based heterostructures largely depends on the thickness and orientation of the MoS2 components. We report a new facile two-step carbothermal-reduction-assisted CVD synthesis protocol to produce horizontally and vertically aligned MoS2 nanosheets (NSs) on activated carbon (AC) granules. MoO3/AC pellets were first prepared by sonicating MoO3 and AC powders and then used as a substrate and Mo source to obtain MoS2/AC composites. A feature of the process is that MoO3 particles, prior to interaction with sulfur, undergo carbothermal reduction with the formation of Mo suboxides favorable for MoS2 growth. The thickness and orientation of MoS2 NSs strongly depend on the synthesis temperature. At 600 °C, horizontally oriented triangular MoS2 NSs are formed on the surface of molybdenum oxide particles, and at 700 °C, thin vertically oriented MoS2 NSs with a high aspect ratio (with a thickness and a lateral size of 20 × 5000 nm2) are grown. The high photocatalytic activity of MoS2/AC composites during the decompositions of organic dyes under UV radiation is associated with the thickness and orientation of MoS2 NSs. The vertical arrangement of the active edges intensifies the chemical interaction with the reagents, and the small NS thickness prevents the recombination of charge carriers and facilitates their transfer to the surface. The obtained results open up new possibilities for the development of cost-effective and scalable MoS2-based photocatalysts with tunable thickness and orientation of MoS2 NSs on commercially available AC substrates using a carbothermal-reduction-assisted CVD approach.

Non‐Thermal Plasma Assisted Fabrication of Ultrathin NiCoOx Nanosheets for High‐Performance Supercapacitor

AbstractInvited for this month's cover picture is the group of Jaebeom Lee from Chungnam National University. The cover picture shows exfoliation of bulk NiCoOx layered double hydroxides into few layers of ultrathin nanosheets using a non‐thermal Ar‐plasma exfoliation strategy to obtain a single layer of NiCoOx nanosheets with excellent supercapacitive properties owing to improvement on the accessible active sites for charge storage and transport. Read the full text of the Research Article at 10.1002/batt.202200270.

Highly sensitive chemiresistive detection of NH3 by formation of WS2 nanosheets and SnO2 quantum dot heterostructures

The development of chemiresistive ammonia (NH3) sensors has attracted considerable attention for health monitoring applications. In this study, we fabricated two-dimensional (2D) tungsten disulfide (WS2) nanosheets decorated with tin oxide (SnO2) quantum dots for detecting NH3 gas. We tuned the WS2 nanosheet:SnO2 quantum dot ratio to achieve the maximum interfacial area to enhance the sensitivity of NH3 detection. First, the liquid-phase exfoliation process for WS2 was optimized to prepare a stable, high-concentration dispersion comprising 5–6 layers of WS2 nanosheets. Furthermore, SnO2 quantum dots interfaced with WS2 nanosheets at different ratios were prepared to fabricate NH3 sensors. The maximum response of the WS2/SnO2 heterostructure to 10 ppm NH3 was ∼850 % for a WS2:SnO2 ratio of 10:1, which exceeds the response of previously reported NH3 sensors. This superior response led to high sensitivity (∼175 % ppm−1) at low NH3 concentrations and a low limit of detection (∼10 ppb). The electron transfer at the WS2-SnO2 interface has been discussed by studying the bond formation between WS2 and SnO2 at different ratios. This insight into the sensing mechanism could be useful for the development of heterostructured sensors, which can be implemented for NH3 detection in industrial and medical fields.

Novel 2D Layered Manganese Silicate Nanosheets with Excellent Performance for Selective Catalytic Reduction of NO with Ammonia

AbstractTwo‐dimensional (2D) catalysts are highly attractive for their great potential in environment remediation and energy conversion. In this work, a novel layered manganese silicate (MnSiO3) catalyst was synthesized by hydrothermal method using silica in vermiculite, a layered silicate clay mineral, as the lattice‐matching matrix and silicon source. The epitaxial growth of MnSiO3 is confined in the 2D directions, resulting in the morphology of vermiculite crystal thin nanosheets. The physichemical characterization results showed that MnSiO3 possessed higher Mn4+ content, acidic sites and reducing substances than that of MnOx/SiO2. The MnSiO3 therefore exhibited 100 % NO conversion rate with 85 % N2 selectivity at 150 °C in the NH3−SCR process. In situ DRIFTS studies show that MnSiO3 has strong NO adsorption capacity and NH3 activation capacity, which is beneficial to the improvement of NH3−SCR activity.

Effect of phase change in the layered VSx nanosheets for investigation of dielectric function and optical properties at the wavelength range of 10–20 μm

In this study, we synthesized VSx transition metal chalcogenides by the hydrothermal method and changed some parameters (reaction time, synthesis temperature, and adding surfactant) in the synthesis process. In this work, the structure of samples has been analyzed (by x-ray diffraction, ultraviolet–visible, Fourier-transform infrared, field-emission scanning electron microscopy). The vanadium sulfide structure phase altered from VS4 to VS2 by increasing the time and temperature of the reaction. Based on Kramers–Kronig equations, the effect of changing synthesis parameters and sheet dimensions on optical and dielectric parameters was investigated. Different components of the complex refractive index and complex dielectric function are increased by decreasing sheet dimensions. Also, the position of transversal and longitudinal optical modes is shifted to lower wavenumbers by increasing sheet dimensions. Moreover, the real part of the dielectric function alters from negative to positive by sheet dimension’s alteration. This study demonstrates the great potential of vanadium sulfide compounds for optoelectronics applications.

Ni2P Nanoparticle-Inserted Porous Layered NiO Hetero-Structured Nanosheets as a Durable Catalyst for the Electro-Oxidation of Urea.

The electro-oxidation of urea (EOU) is a remarkable but challenging sustainable technology, which largely needs a reduced electro-chemical potential, that demonstrates the ability to remove a notable harmful material from wastewater and/or transform the excretory product of humans into treasure. In this work, an Ni2P-nanoparticle-integrated porous nickel oxide (NiO) hetero-structured nanosheet (Ni2P@NiO/NiF) catalyst was synthesized through in situ acid etching and a gas-phase phosphating process. The as-synthesized Ni2P@NiO/NiF catalyst sample was then used to enhance the electro-oxidation reaction of urea with a higher urea oxidation response (50 mA cm−2 at 1.31 V vs. RHE) and low onset oxidation potential (1.31 V). The enhanced activity of the Ni2P@NiO/NiF catalyst was mainly attributed to effective electron transport after Ni2P nanoparticle insertion through a substantial improvement in active sites due to a larger electrochemical surface area, and a faster diffusion of ions occurred via the interactive sites at the interface of Ni2P and NiO; thus, the structural reliability was retained, which was further evidenced by the low charge transfer resistance. Further, the Ni2P nanoparticle insertion process into the NiO hetero-structured nanosheets effectively enabled a synergetic effect when compared to the counter of the Ni2P/NiF and NiO/NiF catalysts. Finally, we demonstrate that the as-synthesized Ni2P@NiO/NiF catalyst could be a promising electrode for the EOU in urea-rich wastewater and human urine samples for environmental safety management. Overall, the Ni2P@NiO/NiF catalyst electrode combines the advantages of the Ni2P catalyst, NiO nanosheet network, and NiF current collector for enhanced EOU performance, which is highly valuable in catalyst development for environmental safety applications.

Alkanolamine intercalation assisted liquid phase exfoliation of titanium carbide MXene nanosheets for highly efficient photocatalytic CO2 reduction

Two-dimensional titanium carbide (Ti3C2Tx) MXene nanosheets have been widely concerned due to its abundant surface functional groups, high conductivity, excellent photoelectrochemical properties and thermal conductivity. Nevertheless, it is still a challenge for the mass production of high-quality Ti3C2Tx MXene nanosheets. Herein, the bulk Ti3C2Tx MXene powders were stripped into monolayer or few layer nanosheets in propylene carbonate through liquid-phase exfoliation strategy assisted via alkanolamine as intercalators. It is shown that the stripping yield is up to 59.3 %, which is the recorded value for the delamination of Ti3C2Tx MXene nanosheets from bulk Ti3C2Tx MXene powder, and 62.2 % of nanosheets are monolayer. The ability of hydrogen bond donor and molecular size of alkanolamine have important effects on the yield. Moreover, Ti3C2Tx MXene nanosheets have been employed as catalysts in the photocatalytic CO2 reduction. The yield of CO is 149.7 μmol g-1h−1, which is about five times that of bulk Ti3C2Tx MXene powder. This work paves the way for the mass production of MXene nanosheets with high activity photocatalysis.

Cover Picture: Non‐Thermal Plasma Assisted Fabrication of Ultrathin NiCoO x Nanosheets for High‐Performance Supercapacitor (Batteries & Supercaps 11/2022)

The Front Cover illustrates exfoliation of bulk NiCoOx layered double hydroxides into few layers of ultrathin nanosheets using a non-thermal Ar-plasma exfoliation strategy to obtain a single layer of NiCoOx nanosheets with excellence supercapacitive properties owing to improvement on the accessible active site for charge storage and transport. More information can be found in the Research Article by J. Lee and co-workers.

Ir Nanoconfined and Doped MnO2 Nanosheets for an Enhanced Electrocatalytic Oxygen Evolution Reaction in Acidic and Basic Medium

One of the promising strategies to generate hydrogen for a future hydrogen economy is via electrocatalytic water splitting, where renewable electricity would be used to convert water into hydrogen and oxygen on an electrocatalyst within an electrolyzer. Oxygen evolution reaction (OER), the anodic half-reaction of water splitting is, however, kinetically sluggish and requires four electron-proton transfers making the overall reaction energy-intensive. For the economical production of hydrogen, improving the reaction kinetics in both low and high pH is of utmost necessity by designing an active and stable OER catalyst. Precious metals like Ir, Ru, and their oxides are known to be excellent OER catalysts but their large-scale application is hindered due to their low earth-abundancy. To address this issue, we have synthesized two types of OER catalysts with varying Ir wt.% to achieve a higher OER-activity per mass of Ir in the catalyst: Ir/MnO2, Ir nano-confined in the interlayer of layered MnO2 nanosheets and Ir-doped MnO2 nanosheets. In both acidic and basic environments, Ir/MnO2 exhibited better OER activity than Ir-doped MnO2. In 0.5 M H2SO4, 16.7 wt.% Ir/MnO2 and 17.5 wt.% Ir-doped MnO2 exhibited OER overpotentials (η) of 298 mV and 320 mV, respectively, at a current density of 10 mA cm-2. In 1M KOH electrolyte, 15.4 wt.% Ir/MnO2 and 17.5 wt.% of Ir-doped MnO2 exhibited OER η values of 213 mV and 245mV, respectively at 10 mA cm-2. These overpotentials are ~500 mV lower than the pristine MnO2 nanosheets and ~60-120 mV lower than commercial reference catalysts (20 wt.% Ir/C and IrO2) at both low and high pH conditions, respectively. These synthesized catalysts were able to outperform the commercial materials by exhibiting four times higher OER-activity per mass of Ir, in both acidic and basic media. Hence, this synthetic approach may be a method to achieve enhanced OER activity using a lower mass of Ir. The physical characterization of the materials was carried out with X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray absorption spectroscopy (XAS).

High-yield exfoliation of MoS2 nanosheets by a novel spray technique and the importance of soaking and surfactants

Liquid-phase exfoliation of two-dimensional materials is very attractive for large-scale applications. Although used extensively, isolating MoS2 layers (<10) with high efficiency is reported to be extremely difficult. Further, the importance of soaking has not yet been studied and the surfactants’ role in stabilizing MoS2 nanosheets is poorly understood (Grayfer et al., 2017) [1]. Herein, we report a novel approach to exfoliate large quantities of MoS2 via high-pressure (HP) liquid-phase exfoliation (LPE) in deionized (DI) water. 4 to 7 layers of MoS2 nanosheets were obtained from 60 days-soaked samples and they were found to be stable in solvents for periods of up to six months. Studies on the effect of three surfactants, namely sodium dodecyl benzenesulfonate (SDBS), sodium cholate (SC) and tetra-butyl ammonium bromide (TBAB), indicate that exfoliation of MoS2 nanosheets in SDBS is highly efficient and better than the other two surfactants. The estimated yield reaches up to 7.25%, with a nanosheet concentration of 1.45 mg/ml, which is one of the highest ever reported. Our studies also suggest that the nanosheet concentration and the lateral size depend on the exfoliation cycles, applied pressure and surfactant concentration. The hydrogen evolution reaction (HER) and an ion-transport study show that the nanosheets prepared by our method are stable in acidic medium and are free from surfactants.

Multi-anions-coupled electronic states in Cl−-doped BiOBr induce highly efficient decomposition of tetracycline hydrochloride

A series of flower-like BiOClxBr1-x (x = 0∼1) with different Cl− doping contents were prepared via a simple co-precipitation method. Experimental results show that BiOCl0.2Br0.8 (20 mg) can decompose tetracycline hydrochloride (20 mg/L) of ∼100% within 30 min, which is far higher than those of the previously reported BiOCl and BiOBr. Microstructural and spectroscopic characterization demonstrates that Cl− doping can effectively change the growth orientation of the layered BiOClxBr1-x nanosheets to expose more (102) active surfaces. Density of states calculations and radical trapping experiments reveal that strong coupling between the electronic states of multi-anions adjusts the band structure, which improves light absorption and generation of main active species ⋅O2−. Meanwhile, strong polarization caused by anionic doping also promotes separation and migration of the photogenerated carriers to different positions of the active surface. As a result, the photocatalytic activities are improved largely and optimal in BiOCl0.2Br0.8.

Multi-Omics Analysis Reveals the Unexpected Immune Regulatory Effects of Arsenene Nanosheets in Tumor Microenvironment.

Arsenene, a two-dimensional (2D) monoelemental layered nanosheet composed of arsenic, was recently reported to feature outstanding anticancer activities. However, the specific biological mechanism of action remains unknown. In this work, we extensively analyzed the mechanism of arsenene in vivo and in vitro and discovered the unexpected immune regulatory capability of arsenene for the first time. Analysis of cell phenotypes in tumor microenvironment by single-cell RNA sequencing revealed that arsenene remodeled the tumor microenvironment by recruiting a high proportion of anticancer immune cells to eliminate the tumor. Mechanistically, arsenene significantly activated T cell receptor signaling pathways to produce antitumor immune cells while inhibiting DNA replication and TCA cycle pathways of tumor cells in vivo. Further proteomic analysis on tumor cells revealed that arsenene induced reactive oxygen species production and oxidative stress damage by targeting thioredoxin TXNL1. The overloaded reactive oxygen species (ROS) further triggered endoplasmic reticulum stress responses to release damage-associated molecular patterns (DAMPs) and "eat-me" signals from dying tumor cells, leading to the activation of antigen-presenting processes to induce the subsequent effector tumor-specific CD8+ T cell immune responses. This unexpected discovery indicated for the first time that 2D inorganic nanomaterials could effectively activate direct anticancer immune responses, suggesting arsenene as a promising candidate nanomedicine for future cancer immunotherapy.

A multifunctional constrained host towards dendrite-free lithium anode

Uncontrolled growth of Li dendrites, the huge volume change of anode as well as unstable solid-electrolyte interphase (SEI) hinder the safety application of high specific energy Li metal batteries (LMBs). Herein, a synergistic strategy is introduced to address the above issues via building a multifunctional constrained host of Ag2S/Ti3C2 film. Anchor the Ti3C2 nanosheets layers with Ag2S nanowires (Ag2S NWs) network to build a solid skeleton structure, which can provide sufficient void space, alleviate the collapse of the host structural during repeated Li plating/stripping. Furthermore, with the Li plating, Ag2S can be reduced to lithiophilic Ag, inducing the uniform Li nucleation and dendritic growth suppression, and the by-product Li2S in situ generation along the Ag2S NWs could strengthen the SEI. Consequently, the electrode of Li-Ag2S/Ti3C2 can operate stably for more than 1200 h at a current density of 0.5 mA cm–2 in the symmetric cell cycling test. The Li-Ag2S/Ti3C2||NCM811 coin cell exhibits high Coulombic efficiencies (CE) (97.94%) after 300 cycles at 1 C.

Cellulose/lignin-based carbon nanobelt aerogels coating on VSe2 nanosheets as anode for high performance potassium-ion batteries

Potassium-ion batteries (PIBs) have attracted high attention in recent years due to the low cost, low redox potential and abundant naturally storage. However, PIBs has been hampered by the large K+ ion and huge volumetric change, which lead to the poor electrochemical kinetic and cycling performance. Herein, the cellulose/lignin-based carbon nanobelt aerogels coating on VSe2 nanosheets (VSe2@CNB) as anode materials for PIBs has been fabricated for the first time by the selenization of VO(acac)2 and subsequent polymerization and coating by carbon nanobelt aerogels. The enhancing in the conductivity and the structural protection have been provided by the interlinked, high surface area and porosity carbon nanobelt aerogels, the VSe2@CNB shows improved potassium-storage performance, obtains high reversible capacity of 227.4 mAhg−1 at 100 mAg−1 after 100 cycles, as well as delivering long-term cycling stability of 125 mAhg−1 at 500 mAg−1 after 1000 cycles with high columbic efficiency (99%). Ex situ X-ray diffraction (XRD) and transmission electron microscope (TEM) measurement indicate that the reversible phase evolution for the storage potassium mechanism of the VSe2@CNB composite consists of K+ insertion into the layer of VSe2 nanosheets and conversion reaction of VSe2 transfer into K2Se.

RGO/Li-Al-LDH composite nanosheets modified commercial polypropylene (PP) separator to suppress lithium dendrites for lithium metal battery

Lithium metal batteries (LMBs) with ultra-high theoretical energy density are a prospective candidate to replace current lithium-ion batteries (LIBs). However, there are still two non-negligible problems of lithium dendrites and the volume expansion effect of LMBs. In this study, reduced graphene oxide (rGO)/Li-Al-LDH composite nanosheets were firstly prepared via a hydrothermal method and then vacuum filtered onto commercial polypropylene (PP) separator. This kind of rGO/Li-Al-LDH nanosheets layer is expected to improve the wettability of liquid electrolytes and thermal stability. Furthermore, rich- Li-Al LDH can promote more ionic carriers and channels, which exhibits higher-efficiency lithium-ion transport properties. Meanwhile, rGO with a graphitic-like structure is able to disperse the concentration of electrons at the sharp point when lithium dendrites arise. As a result, the discharge capacity of the Li||LiFePO4 cells based on the rGO/Li-Al-LDH@PP separator is still 1.852 mAh after 250 cycles and the capacity decay rate is just 4.24%. It is demonstrated that a feasible and effective strategy for the modified separator can enhance the electrochemical performance of LMBs.

Interface modulation induced by the 1T Co-WS2 shell nanosheet layer at the metallic NiTe2/Ni core–nanoskeleton: Glib electrode-kinetics for HER, OER, and ORR

The metallic (1T) transition metal dichalcogenides (TMDCs) are known for their superior electrocatalytic performance, due to their high conductivity, active basal-planes, and exposed edges. Our novel approach of coupling a metallic-NiTe2/Ni nano-skeleton with 1T-Co-WS2 nanosheet in a core–shell arrangement to develop a hybrid heterostructure (1T Co-WS2/NiTe2/Ni) has helped to outperform the trifunctional-electrocatalytic activity (HER, OER, and ORR). 1T-Co-WS2/NiTe2/Ni only requires ultralow overpotential (ηHER = 88 mV@10, ηOER = 290 mV@30), higher half-wave potential for ORR (E1/2 = 0.781 V vs RHE), small Tafel slopes (HER = 68 mV dec-1, OER = 98 mV dec-1, and ORR = 63 mV dec-1) with high electrocatalytic surface area and robust stability in corresponding half-cell reactions. The designed heterostructured electrocatalyst (1T Co-WS2/NiTe2/Ni) presented exceptional total water-splitting performance, requiring a low voltage of 1.521 V to yield 10 mA cm−2 current with extensive structural and electrochemical durability. Such performance could be attributed towards improved nanochannel morphology with exposed active edge, fluent electrode-kinetics, facile adsorption–desorption of reaction intermediates owing to the intrinsically tuned 1T-WS2 by cobalt-doping, and hybridized NiTe2/Ni nano-skeleton. The DFT study confirmed that the incorporation of Co atoms in basal plane and the edge sites of WS2 lattice induces the redistribution and modulation of electronic structure for fast electron/charge transfer and the synergistic coupling of 1T NiTe2 heterostructures bolstered the electrocatalytic activity of the as-prepared catalysts. These outcomes provide a prospect towards the design and application of efficient 2D/2D heterostructured electrocatalyst for zero emission energy goal.

Interfacial polarization suppression of P(VDF-HFP) film through 2D montmorillonite nanosheets coating

Polymer based dielectrics with excellent high electric field withstanding capability are of great significance for enhancing the power density and payload efficiency for both electrical and electronic systems. However, polymer-metal interface is prone to defect formation, leading to the dielectric aging and the initialization of electrical breakdown failure. A facile Montmorillonite (MMT) coating is self-co-assembled on the surface of P(VDF-HFP) high-k film to form hundreds of 2D nanosheets layers to impede the charge injection over the metal-polymer interface. The MMT coating increases the breakdown strength of the P(VDF-HFP) co-polymer film from 405 to 452 MV/m. The high field conduction study reveals a highly enhanced Schottky injection barrier that blocks the charge injection from electrodes to polymer bulk, leading to significantly suppressed charge injection and conduction loss in polymer. In addition, the introduction of MMT layered coating leads to prominent suppression of interfacial polarization loss, a phenomenon known as the blocking capacitance, which would otherwise stem from the accumulated charges of polymer-metal interface, by one order of magnitude, as demonstrated by the dielectric response analysis by using the Dissado-Hill model over a broad range of temperature and frequency. The superior charge injection and interfacial polarization suppression via the application of MMT coating impart the P(VDF-HFP) co-polymer film with higher breakdown strength, and provides an effective approach to develop high performance polymer dielectrics by interfacial engineering. This work provides insights into the understanding of the enhancement mechanism of 2D coating.