50results about How to "Interface stability" patented technology

The invention discloses an ultralow-temperature-resistant urea-bond-containing polyurethane adhesive and a preparation method thereof, and relates to the technical field of adhesives, and the ultralow-temperature-resistant urea-bond-containing polyurethane adhesive is characterized by comprising the following components in parts by weight: 50-65 parts of urea-bond-containing isocyanate prepolymer; 10 to 20 parts of isocyanate; 0.05 to 1 part of a composite catalyst; 0.2 to 1.5 parts of a latent curing agent; 0.05 to 2 parts of a water absorbent; 5-10 parts of a diluent; the invention has the advantages that the preparation process is simple, interlayer lamination can be carried out at low temperature, the curing speed after bonding is high, the ultra-low temperature resistance and hydrolysis resistance are very good, and the problems of slow curing, low peel strength, ultra-low temperature brittleness and the like of the existing product can be effectively solved.

An integrated cleaning and liquid supply device and online cleaning method for polyurethane polishing pads are disclosed. The device includes a base, a rotating seat, a swing arm, an independent liquid supply pipeline system and cleaning pipeline, a high-pressure nozzle array, and a positioning sensor assembly. During the polishing stage, polishing liquid is dripped through the liquid supply outlet. During the cleaning stage, the swing arm moves centripetally to a preset position aligned with the center of the polishing pad. The positioning sensor triggers a high-pressure pump, causing pure water to be sprayed as an atomized jet along the diameter of the pad surface through the high-pressure nozzle array. Simultaneously, the polishing pad rotates at a low speed, utilizing the synergistic effect of centrifugal force and high-pressure water flow to thoroughly remove residual contaminants within the micropores of the polyurethane. This invention integrates liquid supply and deep cleaning functions into the same motion mechanism, eliminating the need for machine shutdown or manual intervention. It offers advantages such as non-contact, non-destructive, thorough cleaning, and high automation, extending the life of the polishing pad and improving the stability of the CMP process.

The invention discloses a preparation method and application of a high-speed perovskite photoelectric detector, and relates to the technical field of detector devices, in particular to the preparation method and application of the high-speed perovskite photoelectric detector. The problems that an existing perovskite-based photoelectric detector is large in dark current, mismatched in energy level, high in series resistance and not beneficial to interface carrier extraction are solved. The method comprises the following steps: providing a substrate and pre-treating the substrate to obtain a pre-treated substrate; spin-coating a NiOx solution on the pretreated substrate, and annealing to obtain a pretreated film layer; the surface of the pretreated film layer is rotationally coated with a 2Br-POOH solution, annealing is conducted, and a first treated piece is obtained; dropping the perovskite precursor solution onto the first processing piece, and performing spin coating and annealing to obtain a perovskite thin film; and thermally evaporating the electrode on the substrate to obtain the photoelectric detector. According to the method, longitudinal growth of perovskite crystals is promoted, collection and transmission of carriers are facilitated, and the device is high in stability and response.

The invention belongs to the technical field of battery materials, and particularly relates to a sodium ion battery positive electrode material and a preparation method and application thereof. The preparation method of the sodium ion battery positive electrode material provided by the invention comprises the following steps: 1) mixing a sodium source, a precursor and a hexavalent tellurium source, and carrying out first calcination to obtain a first calcined material; and 2) mixing the first calcined material obtained in the step 1), a metal selenium compound and an organic solvent, and performing second calcination to obtain the sodium-ion battery positive electrode material. The structure and interface stability of the material are effectively enhanced through a three-in-one modification strategy of doping the high-valence element Te6 + coating the metal selenium compound and adjusting the microstructure, and the obtained sodium ion battery positive electrode material is stable in structure, stable in interface and good in redox reversibility and has good rate capability and cycle performance.

In order to solve the problems that although an existing lithium ion battery with an electrolyte added with FEC can improve the cycle performance of the battery, the high-temperature storage gas production amount of the battery is large, and the battery impedance is high, the invention provides a non-aqueous electrolyte and a lithium battery, the non-aqueous electrolyte comprises a lithium salt, an organic solvent and an additive, the additive comprises a first additive and a carbonic ester compound, the carbonic ester additive comprises fluoroethylene carbonate, the first additive comprises a compound as shown in a structural formula 1, the lithium salt comprises lithium hexafluorophosphate, lithium bis (fluorosulfonyl) imide and # imgabs0, and the non-aqueous electrolyte meets a relational formula 1; a / (b + c) is more than 5.2 and less than 20.7, and the relational expression is 1. The non-aqueous electrolyte provided by the invention can reduce the interface impedance, improve the cycle performance of the battery, reduce the impedance increase of the battery and inhibit the high-temperature storage gas production of the battery, and also considers the quick charge demand of the battery.

The invention discloses a trans-perovskite solar cell based on double boric acid group anchoring and a preparation method thereof. The solar cell comprises a substrate, an anode, a hole transport layer, a co-self-assembly molecular layer, a perovskite light absorption layer, an electron transport layer and a cathode which are stacked. The co-self-assembly molecular layer comprises a first self-assembly molecule and a second self-assembly molecule of an organic compound containing two boric acid anchoring groups and a conjugated skeleton; the conjugated skeleton has at least: an extended conjugated structure including an aryl group, a biaryl group, a plurality of aryl groups bridged by heteroatoms, a heteroaryl group, and a plurality of heteroaryl groups connected by chemical bonds; the regulating group comprises an atom or a group for providing lone pair electrons, or a substituent containing a halogen atom. According to the invention, collaborative optimization of the interface stability, the carrier extraction efficiency and the interface functionality is realized through the co-self-assembly molecular layer, and the photoelectric conversion performance and the stability of the solar cell are improved.

The application belongs to the technical field of all-solid-state lithium-sulfur battery materials, and relates to a lithium sulfide nano composite positive electrode material with high reaction kinetics and a preparation method and application thereof. The application aims to solve the deficiencies of the lithium sulfide positive electrode material in ion and electron conductivity, reduce the activation barrier of the lithium sulfide positive electrode material, improve the battery redox kinetics, and further improve the rate performance and cycle capacity of the battery. The lithium sulfide nano composite positive electrode material is prepared by using an in-situ synthesis method, the obtained composite material has rich metal atom crystals embedded in the lithium sulfide matrix, and a layer of amorphous carbon is uniformly coated on the surface. The finally obtained lithium sulfide nano composite positive electrode material exhibits high reversible capacity and excellent rate performance. The application has the characteristics of uniform coating and simple process, is suitable for large-scale production, and has a wide application prospect in the field of all-solid-state lithium-sulfur batteries.

The invention provides a double-layer pressure-bearing pipe and a preparation method thereof, and belongs to the technical field of pipes, and the preparation method comprises the following steps: carrying out infiltration surface treatment on continuous glass fiber bundles and pretreated basalt fibers in a composite coupling agent ethanol solution, carrying out vacuum drying, uniformly mixing with molten high-density polyethylene, and pressing into a glass fiber / basalt fiber composite belt; the preparation method comprises the following steps: mixing and stirring molten-state high-density polyethylene and modified hollow glass microspheres to prepare an HGM / HDPE composite material, extruding to prepare an inner-layer pipe blank, winding a glass fiber / basalt fiber composite belt on the inner-layer pipe blank, and compounding at 380-400 DEG C to prepare a composite inner-layer pipe; preheated epoxy resin and other auxiliaries are mixed and stirred, the amination-modified SiO2 / CeO2 composite filler is added, high-speed stirring and uniform mixing are performed, the mixture is sprayed to the outer surface of the composite inner layer pipe to form an outer protection layer, high-temperature curing is performed, and the double-layer pressure-bearing pipe is prepared. The bearing strength can be improved, and meanwhile durability and corrosion resistance are achieved.

The application provides a high-thermal-conductivity diamond / copper composite material and an SPS sintering process thereof, raw material pretreatment: selecting three kinds of monocrystalline diamond particles with different particle sizes, mixing the titanium-plated diamond obtained after vacuum titanium plating treatment; solid dry powder mixing: uniformly mixing a solid additive and graphene modified copper powder to prepare a copper-based composite dry powder; nitrogen intermittent airflow suspension dispersion: adding the titanium-plated diamond into a sealed covering tank to make the titanium-plated diamond suspended and dispersed in the sealed covering tank; atomization covering makes the copper-based composite dry powder uniformly covered on the surface of the titanium-plated diamond to obtain composite particles; vacuum low-temperature degreasing to obtain the composite particles after degreasing, and SPS sintering demolding to obtain the high-thermal-conductivity diamond / copper composite material. The coating is uniform and dense, has no exposure and no agglomeration, and significantly reduces porosity and interface thermal resistance; the proportioning is accurate, the degreasing is thorough, and there is no residue; the generation of brittle phases is inhibited, and the interface combination is excellent; the thermal conductivity is stable and greater than 700 W / (m*K), and the density is greater than or equal to 99%.

The utility model discloses an array type myoelectricity electrode patch which comprises a substrate, a plurality of sensing electrodes fixed on the substrate and an electrode interface, a plurality of wires connected with the sensing electrodes are arranged on the substrate, and each sensing electrode is connected with the electrode interface through one wire; the conducting wire comprises a first conducting layer, a second conducting layer and a damping layer from inside to outside, the second conducting layer comprises a sensing area and a non-sensing area, the sensing area is connected with the bottom of the sensing electrode, and the damping layer is tightly attached to the outer side of the non-sensing area. According to the utility model, the outer side of the wire is provided with the damping layer which is tightly attached to the outer side of the wire, so that impact force generated by rapid movement or vibration can be absorbed and relieved, the arrangement of the damping layer is helpful for stabilizing an interface between sensing equipment and skin, and movement interference caused by muscle pulling can be reduced during signal acquisition, thereby reducing errors.

The invention discloses an internally-added non-silicon release master batch, a preparation method and a release film with nanoscale roughness, preparation raw materials comprise PET resin I, a non-silicon release agent composition and an antioxidant, and the non-silicon release agent composition comprises polyester wax and oxidized polyethlene wax. According to the invention, polyester wax and oxidized polyethlene wax are compounded, and a release functional phase which is uniformly dispersed in nanoscale and has a stable interface is constructed in a PET matrix through a unique molecular synergistic effect and a processing technology matched with the polyester wax and the oxidized polyethlene wax, so that the fundamental contradiction that the surface of an internally added release film is rough and the release function is difficult to consider at the same time is solved; and meanwhile, silicon migration pollution is fundamentally eradicated, the process is simplified by utilizing an internal addition process, and recycling is facilitated.

This application relates to the field of energy storage materials technology, and more particularly to a titanium-based active material, its preparation method, and its application. The titanium-based active material comprises a mixed oxide having a layered perovskite structure, the mixed oxide having the general chemical formula shown in Formula 1, M... 2± a La x‑y M1 y B n‑z M2 Z O (3n+1)‑δ Q δ Formula 1; in Formula 1, the M site includes H and / or an alkali metal element; the M1 site includes at least one of Mg, Ca, Sr, Ba, and rare earth elements; the M2 site includes a specified transition element and at least one of Al, Ga, In, Si, Sn, Sb, and Bi; the Q site includes at least one of F, Cl, Br, I, N, and S; the B site satisfies: Nb 2n‑3x‑z Ti 3x‑n Or Nb 2n‑3x Ti 3x‑n‑z This titanium-based active material possesses high energy density, ultra-fast charging capability, long cycle life, and intrinsic safety.

The invention relates to the technical field of batteries, in particular to a composite insulating coating, a preparation method thereof, a battery cell and application of the battery cell. The composite insulating coating comprises a coating layer and a bonding layer which are arranged in a laminated mode, the coating layer is arranged on the surface of the application matrix in an attached mode and comprises organic components with electronegative functional groups and electropositive metal ions, and a dynamic cross-linked network structure is formed through complexation; the bonding layer is arranged on the surface of the coating layer and comprises an organic matter containing a polar functional group; at least on the interface of the coating layer and the bonding layer, the polar functional group in the organic matter and the electronegative functional group in the organic component form chemical bonding. The composite insulating coating can collaboratively seal electrolyte, has high mechanical stability, and can block long-period corrosion; meanwhile, the material has high insulativity, high toughness and an interface self-repairing function, can improve the hidden danger of microcracks caused by uneven stress of a matrix when being applied to a battery cell, reduces the risk of abnormal high-voltage electric breakdown of the matrix, and improves the long-term use reliability of the battery cell.

The present application relates to a kind of preparation method of full solid battery double-layer ultrathin electrolyte film based on transfer printing technology.The present application utilizes the high voltage stability of halide layer and the high ionic conductivity of sulfide layer to synergistically improve the cycle life and high rate performance of battery and other performances through halide / sulfide double-layer electrolyte design.Further, the transfer printing process of multi-layer electrolyte film is designed specifically, and the gradient drying process can avoid substrate deformation, effectively prevent halide / sulfide interlayer cracking, and enhance the interlayer adhesion, achieving electrode thinning, high mechanical strength and interface stability.The present application solves the technical bottleneck of the application difficulty of double-layer electrolyte structure in full solid battery through material system optimization and transfer printing process innovation, and is suitable for the industrial production of high energy density solid state battery.

The invention discloses an all-solid-state battery and a preparation method thereof, the all-solid-state battery comprises a positive plate, an electrolyte membrane and a negative plate which are stacked, and the positive plate is made of a lithiated transition metal sulfide positive active material; according to the invention, all-solid-state battery units are prepared by adopting a dry method or a wet method, and then a plurality of all-solid-state battery units are connected in parallel to form a monopole battery or connected in series to form a multi-pole battery through a bipolar current collector, so that the prepared all-solid-state battery is high in energy density, high in safety and stability and low in cost.

The invention provides an evaporation method and application thereof, and relates to the technical field of vacuum evaporation, the evaporation method comprises the following steps: preheating an evaporation boat, a tungsten mesh and a solid aluminum source arranged on the tungsten mesh; pre-melting treatment is conducted, the solid aluminum source is melted, and molten aluminum covering part of the surface of the tungsten net is formed; pre-evaporation treatment is conducted, the molten aluminum is evaporated, and an initial infiltration area is formed; in the primary wire feeding stage, aluminum wires are fed at the first wire feeding speed, molten aluminum obtained after the aluminum wires are molten is spread in the initial infiltration area till the tungsten mesh is completely infiltrated by the molten aluminum, and at least part of the tungsten mesh is consumed; in the secondary wire feeding stage, aluminum wires are fed at the second wire feeding speed, and the tungsten net is completely consumed; and an evaporation stage: evaporating an aluminum metal layer on the base film. According to the evaporation method provided by the invention, the spreading uniformity and evaporation stability of the molten aluminum are improved, and the technical problems of narrow liquid level, frequent splashing and non-uniform coating thickness caused by non-uniform heat distribution in the traditional process are solved.

The invention discloses a method for improving high-voltage stability of a high-nickel ternary positive electrode material, which comprises the following steps: by taking high-nickel NCM811 as a positive electrode material, dispersing the NCM811 positive electrode material in a lactic acid / water mixed solution for stirring treatment, and carrying out H < + > / Li < + > ion exchange reaction on H < + > generated by hydrolysis of lactic acid and Li < + > in a residual lithium compound (Li2CO3 / LiOH) on the surface of the NCM811 to obtain the high-voltage stability of the high-nickel ternary positive electrode material. Meanwhile, a lactic acid layer is constructed on the surface of the material in situ, and then the carbon-coated NCM811 positive electrode material with a low surface residual lithium compound is obtained through high-temperature carbonization, so that the dissolution of transition metal ions in a bulk phase of the NCM811 electrode material is reduced, the crystal structure of the positive electrode is protected from being damaged, the cycle stability of a nickel-rich Li / NCM811 battery at 4.5 V (vs.Li / Li < + >) high voltage is improved, and the service life of the nickel-rich Li / NCM811 battery is prolonged. The method has important application value for regulating and controlling the structure and components of the NCM811 material and improving the electrochemical performance of the NCM811 material.

This invention discloses a parallel-interface engineered viologen-based defective carbon nitride composite material, its preparation method, and its applications, belonging to the field of energy catalysis and photochemical materials technology. The material comprises: a defective graphitic carbon nitride support; single-atom platinum catalytic sites supported on the support; and a selenium-containing viologen compound anchored by covalent bonds in a configuration parallel to the support surface. Through a bilateral covalent bonding strategy, viologen molecules are stably anchored in a parallel configuration to the single-atom platinum-modified defective carbon nitride surface, constructing a highly efficient and stable "electron bridge" structure, significantly enhancing interfacial bonding and photogenerated electron transport efficiency. This composite material exhibits excellent photocatalytic hydrogen evolution activity and efficient coupling ability with benzylamine oxidation under visible light, and its activity retention rate reaches over 92% after 144 hours of cycling. It provides a new paradigm for solving the problem of poor interfacial stability in photocatalysts and has significant application prospects in the field of solar fuel synthesis.

The application provides a preparation method of isotropic coke and a product and graphite obtained by the method, and belongs to the technical field of coke material preparation. The preparation method of the isotropic coke comprises the following steps: 1) mixing a water-soluble carbon source, a surfactant and water to obtain an aqueous solution; 2) under physical emulsification conditions, slowly adding an oil phase into the aqueous phase to form an oil-in-water emulsion; and 3) performing a coking reaction on the oil-in-water emulsion obtained in the step 2) to obtain the isotropic coke. The application adopts an oil-in-water emulsion limited coking strategy to control the microtexture of the coke from the source, so that the coke is mainly in the form of small flake isotropic structure, and the defects of poor fast-charging performance and easy cycle attenuation caused by the traditional needle-shaped coke fiber structure are overcome, so that the coke has high capacity, high rate and long cycle life after graphitization.

The invention discloses a PAM gel polymer electrolyte electroplating solution for electrogalvanizing and a galvanizing process, and the PAM gel polymer electrolyte electroplating solution is a ternary system mainly composed of a PAM polymer skeleton, a metal salt and a liquid plasticizer, the PAM polymer skeleton is polymerized by an acrylamide monomer and forms a three-dimensional network structure through physical or chemical crosslinking, the metal salt is a soluble zinc salt, the liquid plasticizer is a liquid electrolyte containing a soluble conductive salt, and pores of the three-dimensional network structure of the PAM polymer skeleton are filled with the liquid plasticizer dissolved with the metal salt. And finally, the PAM gel polymer electrolyte electroplating liquid for electrogalvanizing is formed. The liquid phase of the PAM gel polymer electrolyte electroplating liquid is locked through a fixed polymer network of the PAM gel polymer electrolyte electroplating liquid, and the hydrogen evolution reaction (HER which can cause interface disturbance and destroy directional migration of Zn < + >) of the water electroplating liquid can be inhibited, so that a calm and stable interface environment is created, and uniform distribution of zinc ion flow is ensured.

The invention discloses a fast charging electrolyte, a lithium ion battery and a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The fast charging electrolyte provided by the invention comprises an electrolyte lithium salt, an organic solvent and an additive, the types of the electrolyte lithium salt, the organic solvent and the additive are different; the additives comprise a first additive and a second additive; the first additive comprises at least one of an ester additive, a nitrile additive and a hydrofluoroether compound; the second additive comprises an inorganic salt additive; the addition amount of the first additive is 1-20% of the total mass of the fast charging electrolyte; the addition amount of the second additive is 0.01-5% of the total mass of the fast charging electrolyte. According to the invention, the first additive and the second additive are combined and added into the electrolyte, so that the cycling stability, the fast charging performance and the rate capability of the battery can be remarkably improved under the high voltage of more than or equal to 4.6 V.

The invention discloses a modified PVDF (Polyvinylidene Fluoride) binder for a sulfide all-solid-state battery as well as a preparation method and application of the modified PVDF binder. The preparation method of the modified PVDF binder comprises the following steps: dissolving polyvinylidene fluoride, a polymerizable monomer and a chain transfer agent in N, N-dimethylformamide, and carrying out a modification reaction to obtain a block copolymer; precipitating and separating out in methanol, washing, and drying in vacuum to obtain the white powdery modified PVDF binder. The invention also discloses the modified PVDF binder prepared by the method, a composite positive electrode with a gradient structure, and an all-solid-state battery comprising the composite positive electrode. The prepared modified PVDF has good solubility in a non-polar solvent, and erosion of the polar solvent to sulfide electrolyte is avoided. A continuous gradient structure from an electron enrichment area to an ion enrichment area is constructed in the pole piece, the prepared composite positive pole piece has excellent electron and ion conduction at the same time, and the problems of interface transmission bottleneck and solvent compatibility in a sulfide system are effectively solved.

The invention discloses a stress whitening-resistant rigid-tough balanced modified polypropylene material and a preparation method thereof. The composite material comprises the following raw materials in percentage by weight: 60-80% of impact-resistant co-polypropylene; 20 to 30% of talcum powder; 5-15% of a polyolefin elastomer; 5-15% of high density polyethylene; 0.1 to 2% of a compatilizer; 0.2-1% of a stabilizer; and 0-5% of other additives. Under the condition of ensuring the performance of the material, the stress whitening resistance of the material is improved and the material has good self-repairing performance by properly increasing the content of the toughening body and changing the variety of the toughening body. Besides, the compatibility of the modified polypropylene and the filler is enhanced, so that the material still has higher thermal deformation temperature and lower cost, the application range of the product is expanded, and the material is also suitable for large-scale rapid application.

The invention discloses a directionally solidified Fe-B-Si alloy surface protective film and a preparation method thereof. The Fe-B-Si alloy prepared by a directional solidification process is placed in liquid zinc for interfacial reaction. After the reaction is completed, the Fe-B-Si alloy is cooled to obtain a three-layer mortise and tenon structure protective film. The formed surface film and a metal substrate form a mutually interlocking mortise and tenon structure, which is firm and has high stability and density, and can effectively prevent surface peeling caused by zinc liquid cavitation.

The invention relates to an array substrate and a preparation method thereof, and a display panel. The array substrate comprises a first transistor and a substrate; the buffer layer is positioned on one side of the substrate; the first metal layer is located on the side, away from the substrate, of the buffer layer, the first metal layer comprises a first grid electrode of the first transistor, the first grid electrode comprises a first surface, a convex body extending in the direction away from the substrate is formed on the first surface, the convex body has a first orthographic projection on the substrate, and the first surface located outside the convex body has a second orthographic projection on the substrate; the active layer is located on the side, away from the substrate, of the first metal layer, the active layer comprises an active structure, the active structure comprises a channel region, at least part of the channel region and at least part of the first grid electrode are oppositely arranged, and the orthographic projection of the first part of the active structure on the substrate at least partially covers the first orthographic projection; and a second metal layer comprising a first pole of the first transistor, the first pole of the first transistor comprising a second surface facing the substrate, the second surface being in contact with the second portion.

This application relates to the field of soil improvement technology and provides a slow-release microsphere soil conditioner. The slow-release microsphere soil conditioner comprises a core layer, a shell layer, and an outer layer from the inside out. The core layer includes a calcium source, active components, nutrient components, and fillers. The shell layer covers at least a portion of the surface of the core layer and includes anionic polysaccharides, cationic polymers, and metal-polyphenol coordination compounds. The outer layer covers at least a portion of the surface of the shell layer and includes mineral carbon-based functional components and binding components. This application, through the structure of the core layer, shell layer, and outer layer, and a preparation method matching this structure, enables the different components to exhibit differences in spatial distribution and action time, thereby forming a continuous action pathway of preferential interface conditioning in the outer layer, slow-release regulation in the shell layer, and continuous repair and supply in the core layer.

The invention relates to a double-cavity heterogeneous micro-electrolytic cell based on theta-shaped glass tubes and a preparation method thereof.The double-cavity heterogeneous micro-electrolytic cell is prepared through a unique'double-wire packaging-selective dissolving 'process and specifically comprises the steps that a laser drawing instrument is used for drawing the middles of the theta-shaped glass tubes with metal wires in two cavities respectively; two independent theta-shaped glass tubes with tips respectively are obtained; hydrophobizing the outer wall of the tip end of one theta-shaped glass tube; then, one metal wire is selected to be dissolved, so that a micro-channel is formed in the cavity of the tip; and then carrying out electrode assembly after polishing to obtain the double-cavity heterogeneous micro-electrolytic tank. According to the process, a'solid electrode cavity / hollow channel cavity 'heterostructure is created through selective dissolution, a three-electrode system is perfectly integrated in a tiny theta-shaped tip, the structure is compact, and analysis of extremely trace samples can be realized. The problems that a traditional micro-electrolytic tank is difficult to integrate and unstable in interface are solved, and the micro-electrolytic tank is suitable for high-sensitivity detection of micro-samples.

This invention discloses a cathode material and its preparation method, a cathode electrode sheet, and an all-solid-state lithium battery, belonging to the field of all-solid-state lithium battery technology. The cathode material includes a core and a composite coating layer covering the surface of the core. The core includes a ternary cathode material. The composite coating layer includes an inner coating layer, a middle coating layer, and an outer coating layer arranged sequentially from the inside out. The inner coating layer is a solid electrolyte, the middle coating layer is at least one of lithium niobate, lithium zirconate, and lithium tantalate, and the outer coating layer is lithium phosphate. Both the middle and outer coating layers are continuous films. Along the diameter direction of the core, the elastic modulus of the inner coating layer is greater than that of the middle coating layer, and the elastic modulus of the middle coating layer is greater than that of the outer coating layer.

The invention discloses an amorphous iron-based silicon-phosphorus composite negative electrode material and a preparation method and application thereof, the raw materials of the iron-based silicon-phosphorus composite negative electrode material comprise an iron element, a silicon element, a phosphorus element and a carbon material, the molar ratio of the silicon element to the phosphorus element is 2: 1-1: 2, the molar ratio of the silicon element to the iron element is 8: 1-1: 2, and the mass ratio of an iron / silicon / phosphorus mixture to the carbon material is 5: 5-8: 2; the iron-based silicon phosphorus composite negative electrode material is prepared by a one-step or multi-step mechanical ball milling method. In the iron-based silicon phosphorus composite negative electrode material, the introduction of the iron elementary substance induces the microstructure to be disordered and reduces the lithium ion diffusion energy barrier, and meanwhile, the iron elementary substance and the lithium phosphide formed in situ respectively provide abundant electron and ion transmission paths and cooperatively buffer the huge volume deformation of the silicon negative electrode in the lithiation / delithiation process; furthermore, the electrochemical reversibility, the cycling stability and the rate capability of the material in the lithium storage process are effectively improved.

The application discloses a solid-state plastic crystal electrolyte precursor and a preparation method and application thereof, and comprises a polymerizable component, a lithium salt, butanedinitrile, a thermal initiator and an ion synergistic regulator; wherein the ion synergistic regulator is one or several of inorganic anion salt and organic anion salt. Compared with the prior art, the solid-state electrolyte film proposed in the application promotes the butanedinitrile to construct regular clusters or large-grained superlattices through the synergistic effect of the ion synergistic regulator and the polymer network, provides efficient conduction channels for lithium ions, and has super-high ion conduction performance. In addition, the solid-state plastic crystal electrolyte is suitable for high-capacity lithium metal negative electrodes and high-nickel ternary positive electrodes, and the lithium metal solid-state battery constructed thereby exhibits excellent energy density, rate performance and cycle stability.