9results about How to "High magnification" patented technology

This invention relates to a boron-doped multi-element polyanionic sodium-ion battery cathode material and its preparation method, comprising the following steps: [The method involves] mixing Na₄Fe₂O₃ with... 3‑X B X (PO4) 2‑Y (SiO4) Y The stoichiometric ratio of P2O7 is determined by adding ferrous source, boric acid, sodium source, phosphorus source, and silicon source to water, followed by the addition of carbon source and mixing thoroughly to obtain a mixed slurry; wherein 0.2≤X≤0.5, 0<Y≤1; the mixed slurry is then ground to obtain a sand-milled slurry; the sand-milled slurry is dried to obtain precursor powder; under a protective atmosphere, the precursor powder is sintered at 450~550℃ to obtain boron-doped multi-element polyanion sodium-ion battery cathode material. The introduction of boron and silicon elements in this invention helps reduce raw material costs, improve the electrochemical performance of the material, especially enhancing the structural stability, rate performance, and cycle life of the cathode material, and also lowers the sintering temperature, meeting the requirements for cost reduction and efficiency improvement.

This invention provides a bipolar electrode and a bipolar all-solid-state battery. The bipolar electrode comprises a positive electrode film, a current collector, a bulk material layer, and a carbon material layer. Through the design of the carbonaceous framework and nucleating agent in the bulk material layer, efficient and dense lithium metal deposition is achieved under high voltage conditions. The carbon material layer significantly improves the interfacial contact between the bulk material layer and the all-solid-state electrolyte, reduces interfacial resistance, and improves the deposition and extraction efficiency of lithium metal in the bulk material layer. Furthermore, the carbon material layer provides storage space for lithium metal deposited from the positive electrode, mitigating volume changes during lithium metal deposition in the bulk material layer and improving the stability of the bipolar electrode. The bipolar all-solid-state battery fabricated using the bipolar electrode exhibits high rate capability and long lifespan.

The present application relates to a new type of negative electrode material for lithium ion batteries, and particularly relates to a boron-doped porous carbon gas-phase silicon-carbon composite negative electrode material and a preparation method thereof. The boron-doped porous carbon gas-phase silicon-carbon composite negative electrode material is prepared by mixing a resin with a template agent, doping a boron source, adding a spheroidizing agent and an initiator for spheroidization polymerization, removing impurities and drying, and then performing gas-phase etching to form pores. Silicon is deposited in the pores of the porous carbon and a carbon layer is deposited on the surface of the silicon-carbon precursor by twice chemical vapor deposition, so as to obtain the boron-doped porous carbon gas-phase silicon-carbon composite negative electrode material. The boron element is doped to optimize the electronic conductivity, the spheroidized porous carbon structure is improved to improve the lithium ion transmission channel and enhance the substrate stiffness, and the material has excellent performance of high rate, low expansion and long cycle, so as to solve the problems of insufficient rate performance, low substrate strength and blocked lithium ion transmission of the existing gas-phase silicon-carbon composite negative electrode material in the prior art.

This invention relates to a hollow molybdenum diselenide microsphere and its preparation method. The product is prepared by the following steps: ammonium molybdate is weighed and dissolved in deionized water, stirred until completely dissolved; dopamine hydrochloride is then added to the resulting solution and stirred until homogeneous; anhydrous ethanol is added to the resulting solution and stirred until homogeneous; ammonia is added dropwise to the resulting solution; the resulting solution is allowed to stand at room temperature for a period of time, washed, and dried to obtain a precursor; the obtained precursor and selenium powder are placed in an inert atmosphere and calcined in a sealed environment, then naturally cooled to room temperature to obtain the hollow molybdenum diselenide microsphere. The beneficial effects of this invention are: it can suppress the shuttle effect of polysulfides through strong electronic interactions with polysulfides, promoting the catalytic conversion process of polysulfides, making it an ideal high-efficiency electrocatalyst; simultaneously, the hollow structure can physically confine polysulfides, thereby effectively suppressing the shuttle effect of polysulfides.

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 application relates to an in-vehicle microphone (MIC) conversion circuit. The in-vehicle MIC conversion circuit includes: a MIC input amplifier circuit, a MIC signal conversion circuit, and a noise reduction circuit; the MIC input amplifier circuit amplifies the MIC signal and outputs an amplified first signal; the MIC signal conversion circuit is connected to the MIC input amplifier circuit, and processes the first signal to obtain a second signal with an AC component opposite to the first signal; the noise reduction circuit is connected to the MIC signal conversion circuit. The solution provided by this application has lower cost and higher amplification factor, voltage adaptability, and adjustability.

The application belongs to the technical field of lithium ion battery negative graphite material, and specifically discloses a lithium ion battery high-rate graphite negative material and a preparation method thereof.A lithium ion battery high-rate graphite negative material comprises the following raw materials in parts by weight: carboxymethyl cellulose 1-2 parts, modified asphalt 8-10 parts, graphite 20-25 parts, boron nitride 1-3 parts, N-methyl pyrrolidone 15-20 parts, deionized water 5-6 parts and modified phenolic resin 4-7 parts.The application adopts core modification, cooperates with surface double protection, improves conductivity, has high rate and long cycle, and has good thermal stability and life extension.

The application relates to a halide solid-state electrolyte as well as a preparation method and application thereof, and relates to the technical field of new energy materials. 1.5 Zr 0.5 M 0.5 Cl5O 0.5 , wherein M is Ta or Nb; and the inner core is a crystalline halide electrolyte with a chemical general formula of Li 2.5 Y 0.5 Zr 0.5 Cl 6‑4x F 4x , wherein 0.05<=x<=1.45. The halide solid-state electrolyte has high ion conductivity, high oxidation potential, high mechanical performance, good chemical stability with sulfides and high air stability.

This invention discloses a graphite-coated Prussian blue and its analogues, their preparation method, and applications, belonging to the field of graphite material preparation technology. The method includes: mixing graphite with one or more of ferric chloride or transition metal chlorides at a mass ratio of 10-0.5, placing the mixture in a reaction apparatus, and purging the apparatus with a protective gas; heating the reaction apparatus to obtain a solid powder; mixing sodium ferrocyanide with the solid powder at a molar mass ratio of 4-1 and adding it to deionized water, with a solid-to-deionized water mass ratio of 1:50-500, and then stirring the reaction for 12-48 hours; filtering the solution after the reaction. This invention uses a protective gas atmosphere to vaporize ferric chloride or transition metal chlorides at high temperature, allowing the ferric chloride or transition metal to be perfectly incorporated into the interlayer spaces of graphite. Then, the sodium ferrocyanide aqueous solution reacts fully with the ferric chloride or transition metal chloride inside the graphite to obtain a graphite structure completely coated with Prussian blue.