16results about How to "Facilitates electron conduction" patented technology

The invention provides a silicon-carbon composite material as well as a preparation method and application thereof. The silicon-carbon composite material comprises a porous carbon material; the silicon particles are distributed on the surface layer of the porous carbon material and in pore channels in the porous carbon material, the distribution concentration of the silicon particles in the surface layer of the porous carbon material is smaller than that of the silicon particles in the porous carbon material, and the particle size of the silicon particles in the surface layer of the porous carbon material is smaller than that of the silicon particles in the porous carbon material; the silicon dioxide layer is formed on the surface of the silicon particles; and the carbon coating layer is formed on the surface of the silicon dioxide layer. The lithium ion battery prepared by taking the silicon-carbon composite material as a positive electrode active material shows good electrochemical performance, and has relatively high specific capacity, good cycling stability and rate capability.

The invention relates to the technical field of plate electrodes, in particular to a plate electrode based on a polymer and a conductive micro-nano material and a preparation method of the plate electrode, the plate electrode comprises the polymer and the conductive micro-nano material, the polymer is one or two of a polymer plate and a polymer emulsion, and the particle size of the conductive micro-nano material is one or more of 40 nm to 10 [mu] m. According to the plate electrode based on the polymer and the conductive micro-nano material and the preparation method of the plate electrode, the plate electrode prepared from the conductive micro-nano materials with different particle sizes has relatively low surface resistivity and relatively high oxygen evolution potential, and can meet application requirements of specific places such as water treatment, electrochemical preparation of graphene and the like.

The invention discloses a preparation method and application of a bimetallic phosphate oxygen evolution electrode. The preparation method of the bimetallic phosphate oxygen evolution electrode comprises the following steps: cleaning a nickel substrate in an alkaline solution to remove oil, and cleaning the nickel substrate with pure water; soaking the cleaned nickel substrate in an acid solution, cleaning the nickel substrate with pure water, and placing the nickel substrate in the pure water for later use; the nickel substrate placed in the pure water serves as a cathode, two pure nickel materials are placed on the two sides of the nickel substrate to serve as two anodes, and electro-deposition is conducted on the nickel substrate in a bimetallic phosphate solution; and washing an electrode obtained after electrodeposition of the nickel substrate, and drying to obtain the bimetallic phosphate electrode. According to the preparation method, the adsorption free energy of a catalytic layer on the surface of the bimetallic phosphate oxygen evolution electrode on a reaction intermediate is optimized through the synergistic electronic effect of two metals, so that the intrinsic activity of oxygen evolution reaction is improved, meanwhile, a relatively stable catalytic layer structure is formed, and the stability of the bimetallic phosphate oxygen evolution electrode in the oxygen evolution process is improved.

The present invention discloses a porous composite foil, including a porous composite foil current collector; the porous composite foil current collector includes a polymer insulating layer and two metal conductive layers; the upper and lower sides of the polymer insulating layer are respectively covered with a layer of the metal conductive layer; a plurality of through holes are penetrated through the porous composite foil current collector; the outer side surface of each metal conductive layer in the porous composite foil current collector is respectively coated with a layer of mixed primer. The present invention also provides a positive electrode plate, a negative electrode plate and a semi-solid lithium ion battery and a preparation method. In view of the problem of large internal resistance of the original composite foil, the present invention introduces a mixed primer containing a conductive agent and an inorganic oxide solid electrolyte with good electronic conduction and ion conduction on the surface of the porous composite foil, thereby improving the bonding adhesion between the active material and the current collector, constructing a complete ion and electron transmission channel, reducing the internal resistance of the battery, and improving the rate performance.

This invention discloses a high-rate carbon-coated lithium iron phosphate cathode material and its preparation method, relating to the field of lithium-ion battery cathode material technology. The material constructs a unique bilayer composite carbon-coated structure on the surface of lithium iron phosphate particles, including an inner continuous dense conductive carbon layer and an outer three-dimensional porous carbon network layer. The inner carbon layer ensures rapid electron conduction, while the outer porous carbon layer maintains electron pathways, provides abundant ion diffusion channels, and buffers volume changes. The preparation method utilizes a stepwise liquid-phase coating and segmented heat treatment process. This invention effectively solves the problems of poor electronic conductivity and slow ion diffusion in lithium iron phosphate materials, significantly improving its high-rate charge-discharge performance and cycle stability. Furthermore, the process is controllable and suitable for large-scale production, showing broad application prospects in power batteries and high-power energy storage.

The present invention discloses a material recovery method in the process of microbial anaerobic digestion, and belongs to the technical field of resource utilization of organic solid waste and residual sludge. It includes zeolite modification: modifying zeolite with an iron-containing solution to obtain iron oxide modified zeolite; inoculum: selecting sludge that has undergone anaerobic fermentation as seed sludge, washing, sieving and storing at low temperature, and awakening it with glucose as substrate when it is taken; sludge anaerobic digestion: taking another part of the sludge as substrate, contacting and mixing the seed sludge with the substrate at a ratio of volatile solid VS of (1-2): (2-1) to digest the material; then adding iron oxide modified zeolite to the digested material, reacting in an oxygen-deficient, sealed environment; during the reaction, collecting gas.

The present invention provides a modified conductive carbon black, a carbon-coated slurry and a carbon-coated aluminum foil and a preparation method thereof. The conductive carbon black is subjected to an ozonation modification treatment to introduce an epoxy group into the surface of the conductive carbon black, and then an intrinsic conductive polymer is introduced into the surface of the conductive carbon black through a monomer polymerization reaction and an epoxy ring-opening reaction to obtain a conductive carbon black modified with an intrinsic conductive polymer. This method can enhance the conductivity of the conductive carbon black and increase the conductive nodes, and can be used to prepare a carbon-coated slurry, improve the easy solidification phenomenon of the slurry due to the loss of water fluidity, and reduce the amount of binder used, reduce the resistance, and prepare a carbon-coated slurry with good processing performance and a carbon-coated aluminum foil with ultra-low resistance.

The invention relates to a current collector with a functional coating and a preparation method and application thereof, and relates to the technical field of lithium ion batteries and supercapacitors. Comprising the following steps: (1) uniformly mixing a conductive agent, a first binder and pure water for the first time to obtain first mixed slurry; adding a second binder into the first mixed slurry, and uniformly mixing for the second time to obtain second mixed slurry; the slurry viscosity of the second mixed slurry is adjusted to be 1000 Pa.s or below, and functional coating slurry is obtained; and (2) coating at least one surface of the metal current collector subjected to corona treatment with the functional coating slurry, and drying to obtain the current collector with the functional coating. According to the invention, the electron conduction between the electrode active material and the current collector is effectively enhanced, the current distribution consistency of the electrode plate is improved, and the cycle life of the energy storage device is prolonged; the device is simple, the operation process is simple and convenient, the labor intensity of workers is effectively reduced, and the device is suitable for popularization.

This invention discloses a method for preparing a three-phase composite material of perovskite, carbon, and alloy particles, and its application in water electrolysis. The method allows for the in-situ growth of 10-20 nm alloy particles on the surface of perovskite, and the coating of the perovskite and alloy particles with a carbon-nitrogen shell. The perovskite has a size of 100-200 nm, and the carbon-nitrogen shell has a thickness of approximately 10 nm, which is adjustable. In this invention, perovskite material is distributed in a dopamine salt solution. Under alkaline conditions, the dopamine salt polymerizes on the perovskite surface to form a polydopamine coating. After drying, it is calcined under an inert atmosphere to form a carbon-nitrogen shell structure. The metal sites in the perovskite and the alloy particles act as active sites, catalyzing the oxygen evolution reaction. The sufficiently small size of the surface-deposited alloy particles provides more active sites, promoting improved catalytic activity. The carbon-nitrogen shell increases the conductivity of the material, further enhancing its electrocatalytic activity.

The present invention provides a multi-element non-precious metal alloy nanowire array material, which is mainly aimed at the problem of excessive energy consumption caused by insufficient electrode activity in the process of hydrogen production by alkaline water electrolysis. At the same time, the use of this material can also meet the working conditions under a higher current density, and at the same time has the dual functional properties of cathode hydrogen evolution and anode oxygen evolution, further improving the assembly fault tolerance of the equipment. This material is prepared by a two-step method, does not involve precious metal elements, and greatly reduces the production cost. The prepared integral catalytic electrode achieves an improvement in the efficiency of efficient water electrolysis hydrogen production and has good stability, and has industrial application prospects and commercial value.

The present application provides a complementary metal oxide semiconductor (CMOS) field effect device, comprising a substrate; a first n-type doped S / D region and a second n-type doped S / D region; a first p-type doped S / D region and a second p-type doped S / D region; a first channel layer disposed above the substrate, the first channel layer comprising a first sub-layer and a second sub-layer; wherein the first and second n-type doped S / D regions are disposed on a first side of the first channel layer, and the first and second p-type doped S / D regions are disposed on a second side of the first channel layer, the second side being opposite to the first side; wherein an energy of a conduction band edge of the first sub-layer is lower than an energy of a conduction band edge of the second sub-layer; and wherein an energy of a valence band edge of the first sub-layer is lower than an energy of a valence band edge of the second sub-layer; and a gate structure adjacent to the first sub-layer and the second sub-layer of the first channel layer.

The application discloses a silicon-carbon composite material and a preparation method and application thereof, and belongs to the field of electrochemical energy storage. The silicon-carbon composite material comprises a silicon-based active substance and a low-crystallization carbon matrix, the low-crystallization carbon matrix coats and / or disperses the silicon-based active substance; and the Raman spectrum ID / IG value of the low-crystallization carbon matrix is greater than 1.2. The low-crystallization carbon matrix has high disorder degree and toughness, can better adapt to the volume expansion and shrinkage of silicon in the charging and discharging process, maintains the integrity of the electrode structure, and thus significantly improves the cycle stability; the low-crystallization carbon surface contains more defects and functional groups, which is helpful to form a stable and dense SEI film, reduces the side reaction in the cycle process and the irreversible consumption of active lithium.

The invention discloses a preparation method of a sodium ion battery biomass-based hard carbon negative electrode material with high initial efficiency, which comprises the following steps: S1, biomass precursor preparation: crushing a biomass raw material to obtain a biomass precursor; s2, preparation of a hydrothermal precursor: soaking in an acid solution, and then washing, centrifuging and drying to obtain the hydrothermal precursor; s3, preparation of a carbonized precursor: soaking in a mixed solution of a reducing agent and a surfactant, transferring the mixed solution into a reaction kettle for heating reaction, cooling to room temperature, and centrifugally drying to obtain a pre-carbonized precursor; s4, pre-carbonization: carrying out pre-carbonization treatment, and then crushing and sieving to obtain a pre-carbonized material; s5, high-temperature coating: carrying out coating treatment to obtain a high-temperature carbonized precursor; and S6, high-temperature carbonization: carrying out high-temperature carbonization treatment to obtain the biomass-based hard carbon negative electrode material of the sodium-ion battery. The invention has the characteristics of high first coulombic efficiency and good cycling stability.

The invention relates to a carbon fiber structure battery negative electrode material, a preparation method, a negative electrode plate and a lithium ion battery. The carbon fiber structure battery negative electrode material comprises carbon fibers, carbon nanotubes and polydopamine. The carbon nanotube and the polydopamine are coated on the surface of the carbon fiber; the polydopamine is used for connecting the carbon fibers and the carbon nanotubes in a strong interaction manner between the carbon fibers and the carbon nanotubes. The carbon nanotubes are selected to modify the carbon fibers, and the carbon nanotubes and the polydopamine are coated on the surfaces of the carbon fibers, so that the specific capacity of the structural battery negative electrode is improved while the mechanical performance and the interface performance are improved. Wherein the polydopamine is used for connecting the carbon fibers and the carbon nanotubes in a strong interaction manner between the carbon fibers and the carbon nanotubes, so that the binding power between the carbon nanotubes and the carbon fibers is further improved, and the carbon fibers have good mechanical properties.

The embodiment of the invention discloses a positive pole piece and a preparation method thereof and a battery, the positive pole piece comprises a positive active material, a carbon nanotube conductive agent and a binding material, the oil absorption value D of the carbon nanotube conductive agent, the specific surface area S of the carbon nanotube conductive agent and the mass percentage w of the carbon nanotube conductive agent in the positive pole piece meet a relational expression R, the three key parameters, namely the oil absorption value, the specific surface area and the content of the carbon nanotube conductive agent, are synergistically regulated and controlled, so that an efficient three-dimensional conductive network is favorably constructed, and the pole piece can have excellent electron conduction and ion conduction at the same time, and has excellent power performance in a low-temperature environment.

This application discloses a battery and its fabrication method, belonging to the field of battery technology. The battery includes: a negative electrode sheet and an electrolyte; the negative electrode sheet includes a negative current collector, a negative electrode coating layer disposed on at least one side surface of the negative current collector, and a graphene interface layer, the graphene interface layer being located between the negative current collector and the negative electrode coating layer; the electrolyte includes: a film-forming additive, the film-forming additive being selected from at least one of fluoroethylene carbonate, difluoroethylene carbonate, and vinylene carbonate. The synergistic effect of these two additives enables the battery to simultaneously achieve high initial discharge capacity, improved rate performance, and cycle stability.