12results about How to "Shorten the diffusion path" patented technology

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

The present application relates to the technical field of sodium battery materials, in particular to a sodium supplement coating based on a spiral iron-carbon composite material and a preparation method thereof, a spiral polypyrrole template is synthesized by a chiral template method, Fe3C@CNS spiral carbon composite material rich in Fe3C nanocrystals and iron single-atom sites is prepared through iron loading, sulfidation and high-temperature pyrolysis, Na2C2O4@Fe3C@CNS composite material is prepared by highly dispersing sodium oxalate on the surface and in the pores of the spiral carbon composite material through a recrystallization method, finally, a slurry is prepared by mixing the Na2C2O4@Fe3C@CNS composite material with a conductive agent and a binder, and the slurry is coated on the surface of an electrode to form a functional sodium supplement coating. The sodium supplement coating based on the spiral iron-carbon composite material and the preparation method thereof solve the problems of poor interface stability and first-cycle irreversible sodium loss of existing sodium ion batteries, realize efficient sodium pre-activation and interface synergistic regulation, and improve the comprehensive performance of the battery.

This invention relates to a core-shell structured sodium iron phosphate pyrophosphate cathode material, its preparation method, electrode sheet, and battery, belonging to the technical field of methods or devices for directly converting chemical energy into electrical energy. The core-shell structured sodium iron phosphate pyrophosphate cathode material of this invention comprises primary particles, each primary particle including: a core, a sodium iron phosphate pyrophosphate shell layer disposed on at least a portion of the surface of the core, and a carbon coating layer located within the pores and on the surface of the sodium iron phosphate pyrophosphate shell layer; the core includes a NASICON-type sodium-ion inorganic solid electrolyte with an average particle size ≤50nm; the average thickness of the sodium iron phosphate pyrophosphate shell layer is ≤500nm; the chemical formula of the sodium iron phosphate pyrophosphate shell layer is Na₄Fe₂O₃. 3‑ x M x (PO4)2P2O7, 0≤x≤0.9, M is a doped metal element. The core-shell structured sodium iron phosphate pyrophosphate cathode material of this invention combines high solid density, high conductivity and good electrochemical performance.

The application relates to the field of secondary batteries, in particular to a kind of antimony negative material and its preparation method, lithium ion battery and terminal, organic ligand containing carboxyl and mercapto, antimony source and polyethylene glycol are mixed to obtain solution A; Sodium borohydride and selenium source are added into ethanol, and then polyethyleneimine is added to obtain solution B; Solution A and solution B are mixed to carry out solvothermal reaction; The solvothermal reaction product is collected, washed and dried, and the lithium ion battery assembled by the antimony-based negative material of the application shows excellent electrochemical performance and can be used in various terminals.

The present application relates to a resin-assisted gradient-doped LMFP positive electrode material, a preparation method and a positive electrode, the preparation method comprising: mixing a sulfonic acid type cation exchange resin with a mixed salt solution, loading metal ions on the sulfonic acid type cation exchange resin, washing to obtain a loaded resin; heat treating the loaded resin to uniformly disperse metal oxides, and then mixing with a phosphoric acid solution to obtain a mixed solution; the mixed solution is dried by spray drying to obtain a precursor powder; mixing a lithium source, a nitrogen-doped carbon source and the precursor powder, and wetting with a glucose solution to form a slurry mixture; after the slurry mixture is dried, sintering is performed to obtain the resin-assisted gradient-doped LMFP positive electrode material. The present application can inhibit the Jahn-Teller distortion of Mn, and improve the cycle stability and conductivity of the positive electrode material.

The application relates to the technical field of photovoltaic modules, in particular to a laminated cell, a preparation method thereof and a photovoltaic module. The laminated cell comprises a top cell unit, a bottom cell unit and a composite layer between the top cell unit and the bottom cell unit. The composite layer comprises a plurality of spaced rod bodies, the rod bodies extend along a first direction, and the rod bodies have a first doping element. The rod bodies at least have a first part and a second part which are stacked, and the doping concentration of the first part is different from that of the second part. The structure of the rod bodies which are spaced and extend along the first direction in the composite layer can form a vertical carrier transport channel in the composite layer, the diffusion path of the carriers is shortened, and thus the carrier transport rate is improved. Meanwhile, by adjusting the doping concentrations of the first part and the second part, the conduction band energy levels of the first part and the second part can be adjusted, so that the potential barrier of the carriers during transmission in the composite layer is reduced, and voltage loss is reduced.

This application discloses a method for preparing and applying a positive electrode for a polymer lithium-ion battery, belonging to the field of lithium-ion battery technology. The preparation method includes: using a carbon fiber woven fabric as a receiving substrate, electrospinning a polyacrylonitrile solution to deposit polyacrylonitrile nanofibers on the surface and interfiber spaces of the carbon fiber woven fabric; pre-oxidizing the carbon fiber woven fabric with deposited polyacrylonitrile nanofibers; and subsequently performing heat treatment in a sulfur-containing atmosphere to convert the polyacrylonitrile nanofibers into sulfurized polyacrylonitrile nanofibers in situ, thereby obtaining the positive electrode. The positive electrode prepared by this application has high specific capacity, high cycle stability, and excellent structural compatibility, and is suitable for all-carbon fiber structure lithium-sulfur batteries.

This invention belongs to the field of functional adsorbent technology, specifically relating to a high-capacity coconut shell activated carbon adsorbent and its preparation method. The adsorbent comprises the following raw materials by weight: 80-90 parts coconut shell activated carbon, 5-15 parts mesoporous composite material, 1-6 parts aromatic donor, 0.3-1.2 parts sodium nitrite, and 1 part acidifier. The mesoporous composite material has both mesoporous mass transfer channels and polar trapping functions, which can improve the diffusion conditions of organic molecules and enhance the adsorption driving force for polar components such as aldehydes and ketones. The adsorbent has a high adsorption capacity and bed utilization efficiency for multi-component organic matter in petrochemical plant gas at normal temperature and pressure, and is suitable for the efficient adsorption and recovery of organic matter.

This invention discloses an ultra-high nickel single-crystal cathode material and its preparation method, belonging to the field of lithium battery technology. The preparation method includes: preparing Ni and Mn continuous gradient precursors in three reactors in series; achieving tungsten / molybdenum and zirconium / titanium dual-element gradient doping through layered spraying; completing crystallization and surface reconstruction through four-stage oxygen-controlled sintering; constructing fast ion channels through directional pore formation; and constructing a three-dimensional conductive network through CVD deposition and nitrogen doping. The resulting cathode material exhibits a gradient structure that alleviates phase transition stress, directional mesopores that improve rate capability, and a three-dimensional network that stabilizes the interface. It maintains >85% capacity retention after 1000 cycles at 4.5V, >95% capacity retention at 5C, and <0.5mL / g of gas generation at high temperatures. The particles show no cracks after cycling, combining high capacity, fast charging, long cycle life, and high safety, making it suitable for high-energy-density power batteries.

This invention provides a porous cathode precursor, a composite cathode material, its preparation method, and its application. The preparation method of the porous cathode precursor includes the following steps: co-precipitating a ternary mixed metal salt solution, a complexing agent solution containing citrate, a precipitant solution, and an oxidant solution into a reaction substrate to obtain a half-step precursor material; and pre-sintering the half-step precursor material to obtain the porous cathode precursor. The cathode precursor prepared by the method provided by this invention has a hollow porous morphology, which is beneficial for improving the cycle performance and rate performance of the ternary cathode material.

This invention belongs to the field of battery cathode material technology, specifically relating to a high-rate manganese-based cathode material, its preparation method, and its application. The material, from the inside out, consists of a manganese-based active core, a mesoporous fast-ion conductor shell, and a pretreatment layer formed in situ from boron-containing compounds coated on the surface of the manganese-based active core. A functionalized carbon nanotube three-dimensional conductive network permeates the active core and shell. This invention achieves this by pretreating the manganese-based active core with boron-containing compounds in a liquid phase to form a surface pretreatment layer, sequentially oxidizing and functionalizing the carbon nanotubes and then lithium-modifying them to construct an embedded three-dimensional conductive network, followed by ball milling and ultrasonic dispersion to prepare a precursor sol and coating it to form a fast-ion conductor shell, and finally, template-assisted calcination to construct a mesoporous structure, thus obtaining a high-rate manganese-based cathode material. This invention effectively inhibits manganese ion dissolution and material structure collapse through multi-structure synergy, improving the high-rate performance and cycle stability of the material, and possesses good industrialization prospects.

The utility model discloses an experimental mouse feeding frame with smell isolation structure, including the feeding frame that a plurality of isolation frames constitute, and a plurality of isolation frames are fixed by a plurality of support poles, the front support pole is equipped with the hole of inserting, and a plurality of hole of inserting are installed with the isolation board, the support pole is installed with the splicing subassembly, and a plurality of isolation frames are matched and installed with experimental mouse feeding case, the isolation board is equipped with the hole of releasing gas, and the hole of releasing gas is installed with the sealing cover, the utility model discloses the sealing groove and the sealing strip cooperation of isolation frame front and back two sides, can closely adhere to experimental mouse feeding case outer wall, and the gap between feeding case and frame is blocked, and the accurate positioning installation of isolation board through the hole of inserting, positioning groove and fixed groove, and the convenient disassembly and installation, and the high maintenance cleaning efficiency, the splicing subassembly adopts T type splicing groove and splicing block design, and the length of both is identical, and one end penetrates one end sealing, guarantees the adhesion and stability when splicing of adjacent isolation frame, and also is convenient for quick assembly or disassembly.