873 results about "Electron transmission" patented technology

The invention provides a high-stability lithium-rich manganese-based positive electrode material and a preparation method thereof, and relates to the technical field of lithium-rich manganese-based positive electrode materials, and the method comprises three steps of preparation of a homogeneous precursor, solid-state mechanical fusion doping and coating, and high-temperature sintering; a lithium-rich manganese-based precursor is prepared by adopting a homogeneous coprecipitation process, uniform distribution of metal ions is ensured, then an aluminum source, a zirconium source and a fluorine source are introduced as doping agents, phosphate and a titanate coating agent are combined, doping and coating integrated treatment is realized through mechanical ball milling, and the lithium-rich manganese-based composite material is obtained. And finally, mixing with a lithium source in an argon atmosphere, and carrying out high-temperature sintering of temperature programming and staged heat preservation to form a stable composite coating layer in situ. Therefore, manganese ion migration is effectively inhibited through lattice doping, a layered structure is prevented from being converted into spinel or rock salt phase, meanwhile, a nanoscale ion / electron transmission channel is constructed, interface impedance is reduced, and the charging and discharging efficiency under high voltage is improved.

The invention discloses a micro-positive pressure hydrogen environment in-situ stress-strain testing device and method. The device comprises a sealed reaction cavity which can be placed in a scanning electron microscope sample cabin; the loading device is arranged in the cavity and is used for fixing and applying a load; the atmosphere control system is communicated with the cavity and is used for introducing gas and maintaining a micro-positive pressure state; an electron transmission window arranged on the cavity, wherein an electronic transparent film packaged by the electron transmission window can maintain air tightness under micro-positive pressure and allows electron beams to penetrate through; and the heating module is arranged in the cavity. The method comprises the following steps: loading and sealing a sample, establishing a micro-positive pressure atmosphere, heating the sample, starting loading, and synchronously carrying out SEM real-time imaging and data recording. The problem that a traditional SEM in-situ device cannot work in a real micro-positive pressure hydrogen and high-temperature environment is solved, and synchronous visual in-situ observation of material microstructure evolution and macromechanical response under the gas-heat-force multi-physics field coupling condition is achieved.

The invention discloses a composite material and application thereof in electrochemical carbon dioxide capture, and belongs to the technical field of electrochemistry and carbon dioxide capture. The composite material provided by the invention comprises a carbon felt and a 1, 4-naphthoquinone compound, the 1, 4-naphthoquinone compound is loaded on the carbon felt; the 1, 4-naphthoquinone compound comprises at least one of 1, 4-naphthoquinone, 2-methyl-1, 4-naphthoquinone or 2, 3-dimethyl-1, 4-naphthoquinone, and the compound is a compound of the 1, 4-naphthoquinone, the 2-methyl-1, 4-naphthoquinone and the 2, 3-dimethyl-1, 4-naphthoquinone. In the composite material disclosed by the invention, a 1, 4-naphthoquinone structure of the 1, 4-naphthoquinone compound can realize specific capture of CO2 through a reversible oxidation-reduction reaction, a carbon felt three-dimensional porous framework provides a smooth channel for CO2 mass transfer and electron transmission, and the 1, 4-naphthoquinone structure and the carbon felt three-dimensional porous framework cooperate with each other to solve the problems of low capture capacity, poor stability and high energy consumption of a traditional carbon material; therefore, the method has a good application prospect in electrochemical carbon dioxide capture.

The invention provides a lithium iron phosphate material and a preparation method thereof, a positive pole piece and a lithium ion battery, the preparation method comprises the following steps: dissolving a soluble iron salt and a ligand in water to form an iron-based complex so as to obtain a first solution; placing the carboxylated cellulose material in a first solution to form an iron-cellulose complex, so as to obtain a first mixed material; carrying out first separation and drying on the first mixed material to obtain an iron-cellulose complex; and mixing a lithium source, an iron source, a phosphorus source, a carbon source and the iron-cellulose complex in a solvent, heating, carrying out second separation on the obtained reaction mixture, and sintering the obtained solid to obtain the lithium iron phosphate material. According to the method, an iron-cellulose complex is used as a one-dimensional structure template, the lithium iron phosphate material with a one-to-many electron transport mechanism is successfully constructed, the conductivity, the rate capability and the working voltage of the material are improved, and the problem of capacity fading of the lithium iron phosphate material under high current density is further solved.

The invention belongs to the technical field of perovskite solar cells, and particularly relates to a preparation method for improving the quality of a perovskite thin film by using a local high-temperature field, and the method comprises the steps: 1, forming a perovskite precursor thin film on an electron transmission layer; step 2, when the precursor film is in an intermediate phase or an incompletely crystallized state, placing the precursor film below a heating plate with a microstructure array, keeping a gap between a convex part of the microstructure array and the surface of the precursor film, and forming a periodically distributed local high-temperature field on the surface of the precursor film; step 3, maintaining the local high-temperature field to act for a period of time, so that the local area of the precursor film is preferentially crystallized; and 4, removing the heating plate, and uniformly annealing the precursor film. According to the method, a local high-temperature field is applied to induce a hot spot region to preferentially nucleate, abnormal growth and Ostwald ripening of crystal grains are inhibited, and the large-area uniform perovskite thin film with narrow crystal grain size distribution, low defect density and a flat film surface is obtained, so that the efficiency and consistency of a device are improved.

The invention discloses a composite lithium supplement additive and a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The composite lithium supplement additive provided by the invention comprises a lithium-rich lithium ferrite core; the conductive carbon coating layer and the pentafluoropropionamide coating layer are sequentially coated outside the lithium-rich lithium ferrite inner core from inside to outside, so as to form a core-shell structure. The composite lithium supplement additive prepared by the invention forms a three-dimensional interpenetrating electron transport network, significantly improves the material conductivity, optimizes the charge transfer dynamics, can effectively isolate lithium-rich lithium ferrite from contacting H2O and CO2 in the air, significantly reduces the generation of surface residual alkali, can adapt to the volume expansion of lithium-rich lithium ferrite in the charge-discharge process, and improves the lithium supplement efficiency. And material structure damage caused by interface stress is reduced, so that the cycling stability of the lithium ion battery is greatly improved, the service life of the lithium ion battery is greatly prolonged, and the material has a wide application prospect in the lithium ion battery.

The invention discloses an ion-electron mixed conductor material and a preparation method and application thereof. The ion-electron mixed conductor material is prepared by doping a heterovalent transition metal element ion pair in a solid electrolyte. The different-valence transition metal element ion pairs comprise same transition metal elements with different valence states or different transition metal elements with different valence states; the solid electrolyte is halide solid electrolyte. Wherein the solid electrolyte structure provides a lithium ion transmission channel, and the transition metal element is rapidly oxidized and reduced to provide an electron transmission channel. The ion-electron mixed conductor is applied to a composite positive electrode of a solid-state battery, can simultaneously transmit lithium ions and electrons, shortens the transmission paths of the lithium ions and the electrons, remarkably improves the content of positive electrode active substances, improves the cycling stability of the solid-state battery, and has a relatively good application prospect in the solid-state battery.

The invention discloses a gradient triggering method for preventing battery short circuit, which comprises the following steps: S1, uniformly mixing early-warning thermal expansion microspheres, open-circuit thermal expansion microspheres and conductive carbon black, adding a water-based adhesive, and fully dispersing to obtain a turbid liquid; s2, coating a current collector with the turbid liquid obtained in the step S1, and then carrying out drying treatment; wherein the expansion temperature of the early-warning thermal expansion microspheres is 85-95 DEG C, the expansion multiple is 10-15, and the early-warning thermal expansion microspheres are used for increasing the internal resistance of the battery during expansion so as to carry out early warning; the expansion temperature of the open-circuit thermal expansion microspheres is 130-140 DEG C, the expansion multiple is 50-100 times, and the open-circuit thermal expansion microspheres are used for disconnecting direct contact between the positive electrode current collector and the negative electrode during expansion and cutting off electron transmission so as to avoid internal short circuit thermal runaway. The anode current collector prepared on the basis of the gradient trigger safety response mechanism for preventing the internal short circuit of the lithium battery has the characteristic that a micron-sized protective layer is in contact with a cathode when the internal short circuit occurs, so that the defects of other methods such as expensive equipment, complex working procedures and reduction of the energy density of the battery are overcome.

The invention provides a compound with an electron transmission function, an organic electroluminescent device containing the compound and application of the compound, the structure of the compound takes 9-alkyl-9-phenyl fluorenyl, phenanthryl and a triazine group as main components, the 9-alkyl-9-phenyl fluorenyl is one of core structures, fluorene is a polycyclic aromatic hydrocarbon with better planarity, and the triazine group is one of the core structures. Alkyl and phenyl are introduced to the ninth site to generate strong spatial repulsive force with a fluorene ring, a three-dimensional and non-planar propeller-shaped structure is formed, and the non-planar structure can effectively inhibit close packing of molecules in a solid state, so that concentration quenching and excimer formation caused by pi-pi packing are prevented, and the stability of the fluorescent probe is improved. And moreover, the rigid and non-planar structure can also effectively improve the thermal stability of the material, and the service life of the device is prolonged. The compound provided by the invention is used as an electron transport layer and a hole blocking layer in a light-emitting device, so that the device has low driving voltage, high luminous efficiency and long service life.

The invention relates to a multi-conductive-agent composite conductive paste for a lithium battery and a preparation method of the multi-conductive-agent composite conductive paste, and belongs to the technical field of lithium battery conductive pastes.The multi-conductive-agent composite conductive paste is characterized in that an iron-molybdenum catalyst is loaded on expanded graphite, then vertical orientation carbon nanotubes and transverse graphene blades are grown in situ, the specific surface area is increased, and the expanded graphite serves as a layered carrier; a metal alloy catalyst can be uniformly loaded in natural pores of the carbon nanotube, a layered framework is kept from collapsing at a high temperature, support is provided for directional growth of a carbon material, electrons can be rapidly transmitted along the carbon nanotube when the composite conductive paste is prepared, gaps of the carbon nanotube are filled by graphene blades, a breakpoint-free conductive network is formed, and the composite conductive paste is prepared. And meanwhile, abundant pores provide channels for lithium ion diffusion, so that the conductive efficiency is improved from the source of the structure, and abundant specific surface area and subsequent nitrogen and sulfur loading provide sufficient sites.

The invention discloses a topology enhanced three-dimensional porous framework lithium-based metal negative electrode material as well as a preparation method and application thereof, and belongs to the technical field of solid-state lithium batteries. The material comprises a three-dimensional porous conductive skeleton and an electrochemical active lithium-based phase, pores of the three-dimensional porous conductive skeleton are filled with the electrochemical active lithium-based phase, and tight physical and electrochemical contact is formed; the three-dimensional porous conductive framework is provided with a lithium-loving surface; the three-dimensional porous conductive skeleton has a Young modulus greater than 10 GPa; and the electrochemical active lithium-based phase is pure lithium metal or lithium alloy. The three-dimensional skeleton can effectively buffer the volume change of active lithium in the charging and discharging process, inhibit the growth of lithium dendrites, provide rapid lithium ion and electron transmission channels and bear external pressure. The all-solid-state lithium battery adopting the negative electrode material shows excellent cycling stability, high critical current density, high rate performance and nearly zero macroscopic volume change, and the comprehensive electrochemical performance and safety of the all-solid-state lithium battery are remarkably improved.

The invention provides an alkaline hydrogen evolution electrocatalyst and a preparation method and application thereof.The alkaline hydrogen evolution electrocatalyst comprises a carrier and an active component, the carrier comprises a reduced graphene oxide layer and a rare earth element doped transition metal oxide layer which are sequentially stacked, and the active component comprises precious metal; the active component is loaded on the surface of one side, far away from the reduced graphene oxide layer, of the rare earth element doped transition metal oxide layer. According to the alkaline hydrogen evolution electrocatalyst provided by the invention, the transition metal oxide layer doped with the noble metal and the rare earth element can form a synergistic catalysis interface, and the reduced graphene oxide layer is used as a carrier substrate, so that a continuous conductive network can be constructed to guarantee electron transmission, and a loaded material can be dispersed and supported through a lamellar structure of the reduced graphene oxide layer; through the synergistic effect of the components and the structure, the hydrogen evolution reaction activity and stability of the catalyst under the alkaline condition are remarkably improved.

The invention provides a high-stability electron transport layer and a perovskite solar cell. A preparation method of the electron transport layer comprises the following steps: evaporating a layer of fullerene (C60) on a substrate on which a hole transport layer and a perovskite thin film layer are prepared; a layer of graphite-like phase carbon nitride (g-C3N4) is spin-coated on the C60; and finally, depositing a layer of tin oxide (ALD-SnO2) by utilizing atomic layer deposition. The g-C3N4 has good electrical conductivity, not only can fill some gaps between C60 and ALD-SnO2, but also can interact with C60 and ALD-SnO2, so that the C60 and ALD-SnO2 are attached more tightly, and the interface stability is improved. The prepared high-stability electron transport layer is applied to a perovskite solar cell device, and the stability of a perovskite solar cell is remarkably improved.

The application relates to the technical field of lithium / sodium ion battery negative electrode materials, in particular to a phosphorus-based negative electrode material with a solid electrolyte interface and a preparation method and application thereof, the method comprises the following steps: mixing phosphorus powder, a carbon material and a metal fluoride and performing ball milling to obtain a composite negative electrode material; and performing sieving treatment on the composite negative electrode material to obtain the phosphorus-based negative electrode material. According to the application, the metal fluoride is doped to in-situ construct a solid electrolyte interface with high strength and high lithium ion / electron transmission, so that the cycle stability and the rate performance of the battery are improved. When the lithium ion battery is discharged, the metal fluoride can in-situ construct a solid electrolyte interface rich in fluorinated lithium with high Young's modulus and lithium-metal alloy with high ion / electron conductivity on the surface of phosphorus-carbon particles prior to phosphorus-carbon lithium intercalation, the solid electrolyte interface can enhance the strength of the solid electrolyte interface by means of the fluorinated lithium with high Young's modulus, so as to inhibit the expansion of the phosphorus-carbon negative electrode, and the cycle stability is improved.

The embodiment of the invention belongs to the technical field of display, and relates to a thin film, a preparation method, a photoelectric device and a display device. The material of the thin film comprises at least two structures of zinc oxide materials. The thin film comprises zinc oxide of two materials, so that the electron transmission efficiency of the thin film can be effectively improved.

The invention relates to the technical field of microelectronic devices, in particular to a single-molecule memristor-rectifier device based on supramolecular assembly and a preparation method thereof. According to the preparation method, the guest molecule B is covalently connected with the tail end of the graphene electrode pair, so that stable and tight interface bonding between the supramolecular functional molecule and the electrode can be ensured; and then soaking the graphene electrode pair connected with the guest molecule B in a solution containing the host molecule A and the guest molecule C to form a supramolecular functional molecule between the graphene electrode pair. The guest molecule C in the supramolecular functional molecule has intrinsic oxidation-reduction activity, and the molecular structure of the guest molecule C can generate a reversible electron gain and loss process, so that controllable and reversible adjustment of charge distribution in the molecule is realized. Under the action of an electric field, through the reversible oxidation-reduction reaction of the guest molecule C, significant changes of intramolecular charge distribution and electron transmission characteristics are triggered, and finally reliable switching of high and low resistance states of the device is achieved.

The invention relates to a silicon-based negative electrode material with a composite coating layer, the silicon-based negative electrode material is of a core-shell structure and comprises a silicon-based material core and the composite coating layer, and the composite coating layer sequentially comprises a carboxyl-containing ionic conductive polymer layer and an electronic conductive polymer layer from inside to outside; wherein the carboxyl group-containing ionic conductive polymer layer is formed by carrying out surface modification on a silicon-based material by using an alkenyl silane coupling agent to form a precursor A, and then carrying out in-situ copolymerization on the precursor A, unsaturated carboxylic acid and an ionic group-containing olefin monomer under the action of an initiator; the precursor A and the carboxyl-containing ionic conductive polymer layer jointly form a precursor B; and the electronic conductive polymer layer is formed by carrying out chemical oxidation polymerization on an electronic conductive polymer monomer on the surface of the precursor B under the action of an oxidizing agent. Strong interface bonding force exists between the composite coating layer and the silicon-based core and between the composite coating layer and the silicon-based core, so that silicon expansion is effectively relieved, the cycling stability is improved, and meanwhile the ion transmission and electron transmission capacity is improved.

A light-emitting device includes a first electrode, and second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode. The interlayer includes an emission layer and a layer. The emission layer includes a first hole transport compound, a first electron transport compound, and a third compound. The layer includes the first electron transport compound, a metal-containing material, and a second electron transport compound, and the layer is between the emission layer and the second electrode.

The invention provides a three-dimensional silicon negative electrode material and a preparation method and application thereof. The three-dimensional silicon negative electrode material comprises a porous silicon material, and the pore wall surface and the particle outer surface of the porous silicon material are coated with an oxide layer, a carbon coating layer and a solid electrolyte layer; and the outer surfaces of the particles of the porous silicon material are coated with conductive polymer layers. According to the three-dimensional silicon negative electrode material, the hole wall surfaces and the outer surfaces of the particles are coated with the oxide layers, the carbon layers and the solid electrolyte layers, so that the structural stability of the material is guaranteed, an electron transmission channel and an ion transmission channel are further constructed, and meanwhile, the outer surfaces of the particles are further coated with the conductive polymer layers; and the structural integrity of the three-dimensional silicon negative electrode material in the circulation process is ensured.

The invention relates to the technical field of preparation of a lithium ion battery positive electrode material, in particular to a lithium-rich manganese-based positive electrode material with a gradient buffer layer, a preparation method of the lithium-rich manganese-based positive electrode material and an all-solid-state battery. The lithium-rich manganese-based composite material sequentially comprises a lithium-rich manganese-based core material, a gradient buffer layer wrapping the lithium-rich manganese-based core material and a surface modification layer wrapping the gradient buffer layer from inside to outside, and the gradient buffer layer sequentially comprises a spinel inner layer, a fast ion conductor middle layer and a self-repairing polymer outer layer from inside to outside. According to the invention, the gradient buffer layer is constructed outside the lithium-rich manganese-based core material, so that the problem of poor stability of the positive electrode material is solved, the surface modification layer is constructed outside the gradient buffer layer, and the problem of poor interface contact is cooperatively solved through precise spatial arrangement of all functional layers and optimization of ion and electron transmission paths. The method realizes bulk phase structure stability and interface dynamic repair, and is especially suitable for a high-energy-density all-solid-state lithium battery system.

The invention discloses a polyacid-based metal viologen framework crystalline material as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous catalytic materials. The crystalline material is synthesized in one step through a hydrothermal method, the molecular formula is Cu2 (H2O) 2 (L) 2 [PW12O40] [OH]. 2H2O, the crystalline material belongs to a monoclinic system, the space group is P21, the cell parameters are alpha = 90 degrees, beta = 114.208 (2) degrees and gamma = 90 degrees, and the structure of the crystalline material is determined through X-ray diffraction. According to the material, accurate compounding of polyacid clusters and metal viologen on the molecular level is achieved, an effective electron transmission channel is constructed, separation of photon-generated carriers is remarkably promoted, and excellent photocatalytic activity is shown. At the ambient temperature, the crystalline material can be used as a catalyst to efficiently degrade dye pollutants (such as methylene blue and rhodamine B) in a water body, the degradation rate within 60 minutes exceeds 90%, and the crystalline material has good cycle stability and structural durability.

The invention discloses an organic solar cell screening method, system and device based on multi-scale simulation, and belongs to the technical field of solar cells. The method comprises the following steps: firstly, analyzing the electronic structure characteristics of an acceptor material, and obtaining the microstructure of a blending system through molecular dynamics simulation; then, interface contact molecule pairs are extracted and subjected to clustering analysis, and comprehensive evaluation parameters are calculated in combination with the accumulation proportion and the charge transfer capacity coefficient; and finally, synthesizing the electronic structure, value and interface interaction to screen the material. According to the method, an evaluation system from molecular intrinsic properties to microtopography to macroscopic properties is established, the energy level asynchronous decline law and multichannel electron transmission characteristics are used as screening standards, the limitation of single-scale simulation is effectively overcome, and accurate prediction and efficient screening of photoelectric properties of organic solar cell materials are achieved.

The invention relates to the technical field of metal oxide coating electrodes, in particular to a carbon nano hybrid material loaded metal oxide coating electrode and a preparation method of the carbon nano hybrid material loaded metal oxide coating electrode. And dissolving metal ions by using the metal ions as a solvent, uniformly coating the metal ions on the surface of titanium or titanium alloy subjected to certain surface treatment, and carrying out heat treatment to obtain a target electrode. The preparation method is simple in process and convenient to operate, the prepared electrode can effectively prevent a corrosion medium from permeating into the coating due to the existence of the nano hybrid material, the service life of the electrode is greatly prolonged, and the electrocatalytic activity of the electrode can be improved by optimizing electron transmission.

The application relates to the technical field of lithium ion batteries, and discloses a silicon-carbon nanotube composite material, which is obtained by dehydration of hydroxylated silicon particles, hydroxylated carbon nanotubes and iminodiacetic acid. The silicon-carbon nanotube composite material provided by the application can anchor the silicon particles on the carbon nanotubes through covalent bond action, can increase the uniformity of dispersion of the carbon nanotubes and the silicon particles, can improve the electron transmission capacity, can play a certain counterforce on the volume expansion force of the silicon particles, can reduce the generation of electrode cracks, can further reduce the consumption of electrolyte, and can improve the cycle stability of the whole electrode. Meanwhile, the preparation method provided by the application does not need a complex operation process, has simple process condition requirements, and is suitable for large-scale production.

The invention provides a carbon nitride-Pt sulfur cobalt zinc photocatalytic hydrogen production material as well as a preparation method and application thereof, and belongs to the technical field of nano material preparation and photocatalytic application. The preparation method comprises the following steps: firstly, respectively preparing g-C3N4 powder and ZnCo2S4 nanoparticles; pt is loaded on the surface of g-C3N4 in situ through a photodeposition method, and g-C3N4-Pt is obtained; finally, ZnCo2S4 is added into the g-C3N4-Pt dispersion liquid, and the photocatalytic hydrogen production material is obtained. According to the preparation method of the photocatalytic hydrogen production material, hydrothermal synthesis, photodeposition and solvent evaporation technologies are combined, metal Pt is introduced to serve as an electron transmission bridge, tight interface contact and an efficient charge transmission channel are constructed between g-C3N4 and ZnCo2S4, separation of photon-generated carriers is remarkably promoted through the formed composite photocatalyst, and the photocatalytic hydrogen production material is prepared. The photocatalyst has an excellent effect on hydrogen production through photocatalytic water decomposition, and is high in cycling stability, environment-friendly and pollution-free.

The invention discloses a method for preparing an ultrahigh-conductivity graphene / copper composite material through nitrogen plasma ball milling, and relates to the technical field of metal-based composite material preparation. The preparation method of the composite material comprises the steps that copper powder and graphene are mixed and placed in plasma ball milling equipment, a plasma generator and a high-energy ball milling device are started for mixing treatment in the nitrogen atmosphere, and composite powder is obtained; and the composite powder is densified through a spark plasma sintering technology, and the block composite material is obtained. Through the synergistic effect of plasma stripping, nitrogen doping and mechanical compounding, high-quality stripping, controllable doping and uniform dispersion of graphene are achieved in one step, interface bonding of graphene and copper is remarkably improved, and the interface electron transmission capacity is effectively enhanced. The graphene / copper composite material prepared by the preparation method disclosed by the invention shows extremely high conductivity while keeping high density.

The invention discloses a positive pole piece and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the technical field of lithium ion batteries. The positive temperature coefficient functional layer is introduced between the positive electrode current collector and the positive electrode active coating, and the positive temperature coefficient functional layer has the characteristic that the specific value of the resistivity at the temperature of more than 80 DEG C to the resistivity at the temperature of 25 DEG C is more than 400%. The positive temperature coefficient functional layer can maintain a stable electron conduction state at normal temperature, and generates controllable volume expansion when the temperature exceeds about 80 DEG C, so that a conductive network is damaged, the resistivity is obviously increased, an electron transmission path is actively interrupted, thermal runaway can be inhibited from the source, and the safety performance of the battery is improved.

The invention belongs to the technical field of wastewater treatment and energy recovery, and particularly relates to a self-driven electro-catalysis system for activating persulfate to degrade antibiotics and application of the self-driven electro-catalysis system. The invention provides a self-driven electro-catalysis system for activating persulfate to degrade antibiotics. The self-driven electro-catalysis system comprises a reaction unit, an electrolyte and an external circuit wire, the reaction unit comprises a cobalt sheet anode and a carbon rod cathode; the external circuit lead is used for connecting the cobalt sheet anode and the carbon rod cathode; and an electrolyte in the electrolyte solution comprises Na2SO4. According to the self-driven electro-catalysis system, in a wastewater solution containing antibiotics, persulfate and supporting electrolyte, an external power source is not needed, spontaneous electron transmission is formed through the potential difference of the cobalt sheet anode and the carbon rod cathode, and self-driven PMS activation and antibiotic pollutant degradation are achieved.

The invention relates to the technical field of low-resistance conductive materials, and particularly discloses a base particle vortex mediated near-room-temperature ultralow-resistance material which comprises a main body material and a regulating medium, the main body material is a doped transition metal oxide or a carbon-based composite material; the regulation and control medium is a low-atomic-weight doping agent; the doped transition metal oxide is La-doped SrTiO3 or Nb-doped TiO. Compared with a traditional copper conductor, the material has the advantages that the resistance is obviously reduced, the energy loss in the electron transmission process can be greatly reduced, the energy efficiency of electronic equipment and new energy equipment can be obviously improved, the material can adapt to the environment temperature change of most indoor and outdoor engineering application scenes, and the application prospect is wide. The problem that part of low-resistance materials are poor in temperature stability is solved, the reliability of long-term operation of devices is guaranteed, conventional processes and equipment such as magnetron sputtering, spin coating and pyrolysis, tube furnace doping and mechanical bending are adopted in the whole process, the operation process is clear and easy to understand, and large-scale production can be achieved in common material laboratories or small and medium-sized production workshops.

The invention relates to the technical field of lithium ion battery materials, discloses a preparation process and application of a nano silicon-carbon composite graphite material, and provides a preparation process for solving the problem: carrying out oxidation and surface chemical modification on silicon particles to construct a stable chemical bonding interface to resist mechanical stress; on the basis of primary carbon coating, graphene and carbon nanotubes are introduced to construct a multi-stage conductive carbon network with point, line and surface combination, so that efficient and stable electron transmission is ensured; a uniform inorganic protective coating is accurately coated on the surface of the composite material through in-situ chemical reaction so as to shield chemical side reaction. The material prepared by the invention shows excellent performance: the powder conductivity of the material reaches up to 21.5 S / cm, which is far beyond that of a conventional conductive agent scheme; the coulombic efficiency is improved to 92.3% for the first time; and after 500 cycles at the multiplying power of 0.5 C, the capacity retention ratio still reaches up to 85.3%, and the comprehensive electrochemical performance of the material is improved.