24 results about "Silicon matrix" patented technology

The invention discloses high-wettability reactive nano-silver ink for flexible electronics and a preparation method and application thereof.The preparation method comprises the following steps that S1, silver citrate is weighed and placed in a container, ammonia water is added, and a mixture A is obtained; s2, adding a citric acid solution and organic alcohol into the mixture A to obtain a mixture B; s3, adding ascorbic acid into the mixture B, performing ultrasonic treatment, and filtering to obtain filtrate which is a mixture C; and S4, a surfactant is added into the mixture C, the surfactant is one or more than two of a polyoxyethylene acid ester surfactant, a polyether modified siloxane surfactant and a phenyl ether surfactant, and the ink is obtained after ultrasonic filtration. The prepared ink has excellent stability, can realize low-level rapid sintering, and shows excellent wettability on a silicon substrate.

The application discloses a kind of organic silicon composite functional materials and its wireless monitoring system and method for intelligent application, the interface film includes by outer to inner sequentially stacked anti-fouling and wetting-resistant surface layer, hydrogen bond enhanced dynamic adaptive layer and inorganic filler modulus enhanced protective layer.Anti-fouling and wetting-resistant surface layer is composed of organic silicon elastomer composite material, hydrogen bond enhanced dynamic adaptive layer is introduced by blending in organic silicon matrix into the modified component containing urea group and the like can form hydrogen bond functional group, and inorganic filler modulus enhanced protective layer is introduced by inorganic filler such as barium titanate to improve modulus and compression resistance.The interface film is integrated with pressure sensor module, wireless communication module and host computer system, to form a complete wireless pressure monitoring system, realize real-time transmission of pressure signal, visual display, threshold alarm and data management.The application is suitable for wearable health monitoring, medical care, child companion guardianship and robot touch and the like fields.

Systems and techniques for facilitating quantum tuning via permanent magnet flux elements are provided. In various embodiments, the system may include a qubit device. In various aspects, the system may further include a permanent magnet having a first magnetic flux, wherein the operating frequency of the qubit device is based on the first magnetic flux. In various cases, the system may further include an electromagnet having a second magnetic flux that tunes the first magnetic flux. In various cases, the permanent magnet may include a nanoparticle magnet. In various embodiments, the nanoparticle magnet may include manganese nanoparticles embedded in a silicon matrix. In various aspects, the system may also include electrodes that apply a current to the nanoparticle magnet in the presence of the second magnetic flux, thereby changing the strength of the first magnetic flux.

The invention relates to a method for detecting carbon coating integrity of silicon negative electrode powder. The silicon negative electrode powder comprises a silicon substrate and a carbon coating layer. The detection method comprises the following steps: contacting an alkaline solution with each group of silicon negative electrode powder in a sealed container; monitoring the pressure change in the container, and recording the gas pressure change rate from the reaction start to the first time range; calculating the gas production rate of the silicon negative electrode powder per unit mass according to the gas pressure change rate; and according to the gas production rate, the difference of the carbon coating completeness of the multiple groups of silicon negative electrode powder is judged. The reaction rates of the silicon negative electrode powder with different coating completeness and the alkaline solution are different, and the gas generation rates are also different, so that the real-time air pressure changes in the sealed container are also different. By monitoring the pressure change in the container in real time, real-time data recording and curve drawing can be realized, the material reaction condition can be calculated, the gas production rate and the gas production rate can be dynamically evaluated, and the coating characteristic difference identification of the silicon negative electrode powder can be realized in a quantitative manner.

The invention discloses a non-combustible reed fiber-silicon composite material based on charge reconstruction driving molecular bridging and a preparation method of the non-combustible reed fiber-silicon composite material, and relates to the technical field of building materials and functional composite materials. The composite material is composed of Portland cement, cationic carbon dot modified reed fibers, regular octahedral Cu-MOF nanoparticles, water and a silane coupling agent, and fiber-cement interface charge reconstruction and molecular bridging are achieved through cationic carbon dots, and the confinement catalytic char forming effect of regular octahedral Cu-MOF is cooperated; the interfacial compatibility and stress transfer efficiency between the reed fiber and the silicon matrix are remarkably improved, so that the composite material has high compressive strength and bending strength, high thermal stability, excellent flame retardance and smoke suppression, can meet the application requirements of non-combustible building boards, and is simple in process, environment-friendly and suitable for industrial production. The method is suitable for popularization and application in practical engineering.

The invention discloses a lead-oxygen-silicon composite solid electrolyte material and a preparation method of a lead-oxygen-silicon battery, and relates to the technical field of solid-state batteries, the material comprises the following components by weight: 15-30 parts of a lead-oxygen compound; 40 to 60 parts of a mesoporous silicon substrate; 1-5 parts of a rare earth element dopant; 0.5-3 parts of an alkaline earth metal dopant; the lead-oxygen compound is compounded to serve as an ion conduction core, the rare earth element and the alkaline earth metal doping agent are matched to form a synergistic system, the ion conduction environment can be optimized, the ion migration efficiency can be improved, free lead ions can be anchored through the chemical effect, lead ion dissolution is greatly reduced, and the lead-ion conductivity is improved. The environmental protection property and the ion conduction capability are considered; and meanwhile, a hierarchical porous structure is constructed by virtue of a mesoporous silicon substrate, so that the lead oxide compound is loaded in order in a nano form, a pore channel is accurately filled with a polymer phase, a continuous and stable ion conduction path is formed, and the problems of high interface impedance and discontinuous conduction path of the traditional electrolyte are effectively solved. [1] The synergistic compounding of the rare earth element and the alkaline earth metal dopant in the patent is the core innovation point, the multi-stage material is only used as the auxiliary innovation, and when an embodiment is written, only the contrast of the core innovation point needs to be written, and the contrast does not need to be written by using the multi-stage material.

Method for producing a shaped body from a silicon matrix composite material, wherein the shaped body is built up step by step from several layers and subsequently infiltrated with silicon, the molded body is built up using powder bed printing, also known as binder jetting, with a layer thickness of 50 to 250 µm, where SiC is used as the ceramic powder and a binder or binder-hardener system in liquid state, characterized in that the ceramic powder has a multimodal particle size distribution, the main fraction of which has a mean particle size measured by laser diffraction in the range of 40-55 µm and the percent difference (D90-D10) / D50 of the total particle size distribution is between 0.5 and 1.0 and wherein the ceramic powder comprises at least one further fraction whose mean particle sizes are 3-5 µm and / or 10-15 µm.

The utility model relates to the technical field of solar energy, disclose a kind of metal electrode for solar cell, solar cell and photovoltaic module.The metal electrode includes: be located in the metal seed layer (it is at least one layer in silver seed layer, nickel seed layer, zirconium seed layer, titanium seed layer, chromium seed layer, nickel silicon alloy seed layer, copper alloy seed layer) of silicon matrix surface grid line area, be located in the base metal grid line (it is copper grid line and / or aluminum grid line) of metal seed layer surface, and be located in the copper phosphate protective layer (it is copper phosphate layer and / or organic copper phosphate compound layer) of base metal grid line surface.The metal electrode is cooperated by metal seed layer, base metal grid line (such as copper grid line) and copper phosphate protective layer, can reduce contact resistance and ensure interface bonding force, can also save cost, can also improve the corrosion resistance of base metal grid line, the stability and reliability of the metal electrode long-term use outdoors are improved, and battery efficiency decay is slowed down.

This application relates to a negative electrode material, a method for manufacturing the same, and a lithium-ion battery. The negative electrode material includes an active material. The active material includes a porous matrix and a silicon matrix, at least a portion of which is distributed within the pores of the porous matrix. The infrared spectrum obtained by measuring the negative electrode material using an infrared spectrometer has a wavenumber of 2090 cm⁻¹. -1 The stretching vibration peak and wavenumber of the SiH2 bond are 2000 cm. -1 There are stretching vibration peaks for SiH bonds. The ratio Z of the vibration peak area of ​​SiH2 bonds to the vibration peak area of ​​SiH bonds in the anode material is 0.01 to 5.0. Within the above limited range, the silicon matrix in the anode material according to the present invention mainly exists in the form of SiH bonds, and it has become clear that the stability of SiH bonds is greater than that of SiH2 bonds, and that a silicon matrix with many SiH bonds contributes to improving the structural stability of the anode material and the mechanical performance of the silicon matrix, reduces the occurrence of side reactions between the anode material and the electrolyte, and further improves the cycle performance and expansion performance of the anode material.

The present invention relates to a process for the production of dihydrogen, comprising a step of bringing into contact: - hydrogenated silicon obtained by bringing a silicon substrate into contact with an acid, the silicon substrate having a purity of less than or equal to 99.99%, and - an alkaline solution, whereby dihydrogen is produced.

The present application relates to the technical field of coating, in particular to a long-acting anti-icing coating containing polysiloxane and a preparation method thereof. The coating uses hydroxyl polysiloxane, tetraethyl orthosilicate, fluorine chain modified cross-linkable core-shell silica and the like as main raw materials, realizes efficient anchoring of fluorine chain and molecular level combination of the organic silicon matrix by constructing a hierarchical core-shell structure with high binding energy. At the same time, a proper amount of dimethyl silicone oil (150-250 mPa·s) is introduced to synergistically control the viscoelasticity and stress dispersion of the matrix, thereby improving the long-acting anti-icing performance. The strategy of cross-linking first and then fluorination is adopted, so that the hydrophobic fluorine chain is aggregated on the surface of the nanoparticles, and a dense cross-linked network is formed in the inside, thereby effectively improving the mechanical strength, wear resistance and low-temperature impact resistance of the coating. The prepared coating not only significantly reduces the ice adhesion, but also has excellent durability and multiple cycle use performance.

The application relates to the technical field of metal recovery, and discloses a chemical silver extraction method and device for waste crystalline silicon photovoltaic cell pieces, which comprises the following steps: S1, removing the cell piece laminated piece, cutting and separating the metal frame and the glass and crushing; S2, putting the crushed pieces into an acid leaching device and adding a nitric acid-hydrofluoric acid mixed leaching agent; S3, filtering after reaction to obtain a silver-containing filtrate and a silicon residue; and S4, adding saturated NaCl solution into the silver-containing filtrate to generate white AgCl precipitate, filtering after standing and collecting the AgCl precipitate. The chemical silver extraction method for the waste crystalline silicon photovoltaic cell pieces realizes synchronous leaching of silver and aluminum, etching of silicon nitride and release of silver ions through one-step room-temperature synergistic leaching of a nitric acid-hydrofluoric acid compound system, and efficiently dissolves the aluminum paste layer in a short time, protects the silicon matrix, and realizes synchronous leaching of silver and aluminum and protection of the silicon matrix in a short time. In combination with a short-process silver chlorination and zinc powder replacement process, high-purity elemental silver and reusable silicon material are directly obtained, and the core problems of high energy consumption, low purity and heavy pollution in the traditional process are solved.

The invention discloses a preparation method of a bio-based repairable flexible conductive organosilicon film. The preparation method comprises the following steps: firstly, reacting bio-based polyol PO3G (poly trimethylene ether glycol) with isophorone diisocyanate to obtain an isocyanate-terminated bio-based prepolymer; then, bis (3-aminopropyl) terminated polydimethylsiloxane (PDMS) and a mixed chain extender of 4, 4 '-(hexafluoroisopropylidene) diphenol and isophthaloyl hydrazine are sequentially used for two-step chain extension, and a bio-based organic silicon matrix with a repairable function is constructed; and finally, compounding with a multi-walled carbon nanotube to prepare the organic silicon film with flexibility, conductivity and self-repairing function. The material can be applied to manufacturing of flexible electronics and wearable equipment.

This invention relates to the field of luminescent materials technology, specifically to a method for preparing room-temperature solid-state phosphorescent stable dual-matrix carbon nanodots and their applications. The method uses dextrin, 3-aminopropyltriethoxysilane, and boric acid as raw materials. By simultaneously introducing a silicon matrix and a boron matrix to form a dual-matrix system, the method combines the excellent stability of the silicon matrix with the unique electronic modulation capabilities of boron. Room-temperature solid-state phosphorescent stable dual-matrix carbon nanodots are synthesized via a hydrothermal method. After three cycles of water immersion-drying, the phosphorescence intensity of the obtained dual-matrix carbon nanodots decreases by only 6% to 7%. The carbon nanodots synthesized by this method have broad application prospects in the fields of anti-counterfeiting and information encryption.

The utility model discloses a TBC solar cell structure, comprising a silicon substrate, the silicon substrate is divided into a front surface and a back surface, the front surface of the silicon substrate is provided with a passivation layer, one end surface of the passivation layer far away from the silicon substrate is covered with an antireflection layer, the back surface of the silicon substrate is provided with a first area and a second area, and the first area and the second area are arranged on the silicon substrate. The first regions and the second regions are alternately distributed on the back surface of the silicon substrate, a silicon nitride layer is arranged on each first region, a separation groove is formed between each first region and each second region, a first electrode and a second electrode are further arranged on the silicon substrate, a tunneling oxide layer is arranged on the silicon substrate, and the tunneling oxide layer is a SiO2 tunneling oxide layer. Compared with the prior art, the TBC solar cell structure provided by the utility model can perform separation protection on the connecting lines on the cell panel, thereby effectively reducing the probability of short circuit of the connecting lines of the TBC solar cell, effectively improving the yield of the TBC cell during production, and reducing the production cost.

The invention relates to the technical field of organic silicon functional materials, and particularly discloses an antistatic organic silicon release film and a preparation method thereof.The antistatic organic silicon release film comprises a film base material and a release agent coated on one side of the film base material; the release agent is prepared from the following raw materials: an organic silicon resin matrix, antistatic ionic liquid, a cross-linking agent, a catalyst, a flatting agent and a tackifying aid, the preparation method comprises the following steps: carrying out a pre-grafting reaction on antistatic ionic liquid and a part of a cross-linking agent under the action of a catalyst to form an antistatic functional prepolymer, and dispersing the antistatic functional prepolymer in an organic silicon matrix for cross-linking curing. The method effectively solves the problems that the ionic liquid is poor in compatibility and easy to migrate and separate out in an organic silicon system. The obtained release film has excellent and lasting antistatic performance, stable release force and good adhesive force, and is suitable for the field of high-end optical and electronic die cutting.

The invention relates to the field of filler dispersion processes, and discloses a filler dispersion process for improving the thermal stability of an organic silicon insulating material, which comprises the following steps: S1, filler screening and characterization: screening at least two high-temperature-resistant fillers from hexagonal boron nitride, muscovite and phlogopite based on the microscopic characteristics of the fillers, the type, the particle size, the morphology and the crystal structure of the filler are systematically characterized; s2, surface chemical modification: carrying out surface chemical modification on the screened filler, and enhancing the interface bonding force between the filler and an organic silicon matrix through coupling agent treatment or functional modification; s3, multi-component filler synergistic dispersion; s4, optimizing process parameters; and S5, forming the composite material. Compared with the prior art, the process has the advantages that through systematic filler screening, surface modification and dispersion process control, uniform dispersion and firm interface bonding of the filler in an organic silicon matrix are achieved, and therefore the thermal stability of the composite material is remarkably improved.

The invention belongs to the technical field of pouring sealants, and particularly discloses a high-thermal-conductivity two-component flame-retardant pouring sealant and a preparation method thereof.The two-component pouring sealant comprises a component A and a component B. The two-component pouring sealant is characterized in that a novel multifunctional composite filler is adopted, aluminum nitride serves as a core of the filler, and the surface of the filler is coated with a zinc oxide shell layer through a hydrothermal method; a core-shell structure is formed, and phosphorus-nitrogen synergistic effect is further grafted on the surface of a shell layer through silane coupling reaction. The composite filler is combined with an organic silicon matrix through chemical bonding, and an efficient heat-conducting network and an intrinsic flame-retardant barrier are constructed in a system. According to the pouring sealant disclosed by the invention, the heat conductivity coefficient is greater than or equal to 3.0 W / (m.K) and the flame retardant property of UL94 V-0 level is realized while the excellent flowability is maintained, and the filler is good in settling resistance and excellent in comprehensive performance, so that the pouring sealant is particularly suitable for pouring protection of high-power-density electronic components.

This application discloses a silicon-based anode material and its preparation method, anode sheet, and a secondary battery, belonging to the field of battery technology. The silicon-based anode material includes a composite matrix material and a first solid electrolyte material; wherein the composite matrix material includes a silicon matrix and a solid electrolyte layer, the solid electrolyte layer being disposed on at least a portion of the surface of the silicon matrix; the solid electrolyte layer includes a second solid electrolyte material, and the ratio of the median particle size of the second solid electrolyte material to the median particle size of the first solid electrolyte material ranges from 0.1 to 0.8. The silicon-based anode material of this application can improve the rate performance and cycle life of batteries.

The invention relates to a modified porous silicon material as well as a preparation method and application thereof in a lithium ion battery. The modified porous silicon material comprises: a monatomic silicon substrate, the interior of which is provided with pores, and the outer surface of which is of a compact structure without orifices; the silicon dioxide layer is coated on the outer surface of the monatomic silicon substrate. According to the modified porous silicon material disclosed by the invention, on the premise of not introducing an inactive material, the unification of high silicon loading capacity, excellent cycling stability and good processing performance is realized, and the technical bottleneck of the existing silicon-based negative electrode material is solved. The process for preparing the modified porous silicon material is simple and controllable, complex equipment is not needed in the whole preparation process, process parameters of each step are easy to regulate and control, the production cost is low, and the method is suitable for large-scale industrial production.

The invention discloses a negative electrode material, a preparation method thereof and a secondary battery. The negative electrode material comprises an inner core and a shell layer formed on the outer side of the inner core. The inner core comprises nanometer silicon and a silicon oxide compound, and the mass fraction of the silicon element is increased from 25%-38% to 70%-85% from the outer side of the inner core to the center of the inner core. The shell layer is formed on the outer side of the inner core, the shell layer comprises a nano-silicon substrate and a nano-composite dispersed and distributed on the nano-silicon substrate, and the nano-composite comprises magnesium oxide and magnesium silicate. According to the negative electrode material provided by the invention, the shell layer containing the magnesium oxide / magnesium silicate nano-composite is constructed, and the gradient structure with the silicon content gradually increasing from outside to inside is formed in the inner core region, so that the negative electrode material can effectively inhibit side reactions in the first lithium intercalation process, the active lithium loss is reduced, and the structural integrity of the shell layer is maintained; therefore, the first coulombic efficiency is remarkably improved, and the cycling stability is improved.

The present application relates to the field of porous silicon material, more particularly to a kind of inside and outside double-doped modified carbon-coated porous silicon material and its preparation method and application.The material includes core layer and wrapping layer: core layer includes lithium inert metal doped silicon matrix, and the lithium inert metal does not carry out deintercalation lithium reaction in charge-discharge process;The wrapping layer is coated outside the core layer, and it is heteroatom doped amorphous carbon layer.The material enhances conductivity and structural strength by internal metal doping, improves ionic conductivity by external heteroatom doping, and uses porous structure to accommodate volume expansion, thereby improving the cycle stability and rate performance of lithium ion battery silicon-based negative electrode material.

The embodiment of the present invention provides a light-emitting device comprising: a substrate; a luminescent chip arranged on the substrate; a phosphor encapsulation for encapsulating the chip, the phosphor encapsulation comprising a narrowband phosphor and comprising: a first luminescent layer covering the upper surface of the luminescent chip; and a second luminescent layer covering the first luminescent layer.In the light-emitting device of the present embodiment, the excitation efficiency and the heat dissipation performance of the narrowband phosphor can be improved by having the first phosphor layer cover the upper surface of the phosphor chip, wherein the first phosphor layer comprises the narrowband phosphor and the silicon matrix, and the narrowband phosphor is homogeneously dispersed in the silicon matrix, so that the narrowband phosphor is located close to the phosphor chip and has a high density in the silicon matrix.

A thermal interface wave-absorbing composite material based on a heterostructure functional unit belongs to the technical field of polymer composite materials and is composed of an organic silicon matrix, a core-shell structure wave-absorbing unit and a bridging heat-conducting filler. The organic silicon matrix is a curable organic silicon system, and the core-shell structure wave-absorbing unit is of a core-shell structure with micron-sized insulating heat-conducting particles as a core and a nano-sized lamellar carbon material as a shell; the bridging heat-conducting filler is a lamellar carbon material graphite sheet with a large diameter-thickness ratio; the preparation method of the thermal interface wave-absorbing composite material based on the heterostructure functional unit comprises the following steps: S1, preparing the core-shell structure wave-absorbing unit; s2, performing premixing; s3, acoustic resonance dispersion; and S4, composite curing. Advanced dispersion processes such as acoustic resonance dispersion and the like are adopted, the contradiction between the dispersion uniformity and the structural integrity of the filler is solved, a heterogeneous synergistic structure is constructed on the microscopic level, the high heat conduction performance and the broadband electromagnetic wave absorption performance of an electronic device are achieved, and a favorable technical support is provided for stable and reliable work of the electronic device.