11results about How to "Abundant resources" patented technology

This invention discloses a porous carbon-supported copper catalyst, its preparation method, and its application, belonging to the field of catalyst preparation technology. The invention uses three-dimensional interconnected ordered porous carbon (NCP) with a large-pore structure as a support, tetraphenylporphyrin copper(II) and tetraphenylporphyrin as nitrogen and copper sources, and KOH or NaOH as activators. An NCP precursor adsorbed with tetraphenylporphyrin copper(II), tetraphenylporphyrin, and an alkaline component is obtained through a two-step adsorption process. This precursor is then pyrolyzed at 600-900℃ under nitrogen protection, cooled to room temperature, and washed with water to obtain the porous carbon-supported copper catalyst (NCP@NC-Cu). This catalyst retains a three-dimensional interconnected porous structure, with the active component (copper species) mainly distributed within the pores of the NCP support, and possesses a large specific surface area and abundant nitrogen. The catalyst was applied to the N-formylation reaction of amines with CO2 and H2 to prepare formamide compounds, exhibiting excellent catalytic activity, recyclability, and good substrate versatility, showing promising application prospects.

The present application relates to the technical field of grain and food processing, and discloses a raw grain treatment method for effectively preventing the discoloration of wheat flour and its flour products, comprising the following steps: S1: after the wheat is cleaned, the wheat is placed above an ozone aqueous solution at 0 DEG C and subjected to heating treatment; S2: the wheat is taken out and rapidly cooled in an ice water bath, and then the wheat is taken out and transferred into a sealed container while ozone gas is introduced; S3: the wheat is taken out and subjected to vibration water treatment, and then the wheat is put into a warehouse for moisture conditioning; and S4: after the moisture requirement is reached, the wheat is ground into flour, weighed and packaged. Through the processes of heating treatment, rapid cooling treatment and moisture conditioning, the ozone inactivation effect on the inside of the wheat is effectively improved, and the inhibition effect on the discoloration of the wheat flour and its flour products is significantly improved; the selected substances meet the requirements of food safety laws and regulations, are non-toxic, harmless and residue-free, and are rich in resources and low in cost.

This invention discloses a method for preparing a flame-retardant gel-like symmetrical electrolyte membrane. First, AHF-5MOF material is grown in situ on a glass fiber substrate using a high-temperature spraying method to obtain a composite battery modified separator. Then, this membrane is placed in a polymer precursor solution incorporating a flame retardant, and undergoes a dual polymerization process of in-situ ultraviolet light polymerization and in-situ thermal polymerization to ultimately form a flame-retardant gel-like symmetrical electrolyte membrane. This invention improves the compatibility between the electrolyte and the separator, reduces the risk of electrolyte leakage and flammability, and enhances the safety performance of lithium batteries. It effectively solves the problem of uneven lithium-ion transport, and the assembled lithium iron phosphate battery exhibits a discharge specific capacity of 150 mAh g at a rated capacitance of 0.1C. ‑1 The capacity retention is close to 100%, and the discharge capacity after 100 cycles at a 1C current density is 117 mAh g. ‑1 Its coulomb efficiency is 99%, demonstrating good cycle stability.

This invention belongs to the field of high-voltage connecting aluminum busbar technology, and specifically relates to a dual-conductor, dual-insulation high-voltage connecting aluminum busbar structure for electric vehicles. It includes: two sets of flat aluminum conductors arranged parallel to each other vertically; a high-temperature resistant insulating tape wrapped around the flat aluminum conductors, allowing the two sets of flat aluminum conductors to form independent positive and negative connecting wires respectively; and an outer insulating layer wrapped around the entire outer side of the positive and negative connecting wires. The manufacturing process of the high-voltage connecting aluminum busbar structure includes the following steps: aluminum busbar extrusion, insulating tape winding, outer insulating layer extrusion, cutting, 3D bending, peeling, conductor punching, labeling, and packaging. The flattened design of this invention significantly reduces vertical space occupation, making it suitable for wiring in narrow areas such as the top and side walls of the battery pack, improving the overall vehicle space utilization. Furthermore, the production process is simplified from 17 steps to 9 steps, reducing carbon emissions and aligning with green manufacturing trends.

This invention discloses a method for preparing a composite polyanionic sodium-ion battery cathode material, relating to the field of sodium-ion battery cathode material technology, including the following steps: S1, preparing in-situ doped ferrous sulfate; S2, preparing a graphene-based dispersion; S3, preparing a modified ferrous sulfate solution; S4, preparing an NFPP precursor; S5, preparing an NFPP cathode material. This invention uses stainless steel pickling waste liquid as raw material, first reducing it by adding elemental iron, then dispersing it in a graphene-based dispersion containing tannic acid to obtain carbon-coated modified ferrous sulfate; preparing the NFPP precursor by co-precipitation; and finally sintering to obtain a composite polyanionic sodium-ion battery cathode material with high compaction density and better electrochemical performance, thus improving the problems of poor conductivity, low compaction, low capacity, low rate capability, and high cost of existing NFPP cathode materials.

This invention relates to a manganese-cerium composite oxide catalyst, its preparation method, and its application in the catalytic oxidation of tetrahydrofuran to γ-butyrolactone, belonging to the field of hydrogen energy utilization and chemical hydrogen storage technology. Using a manganese-cerium composite oxide catalyst (manganese-based oxide) as the catalyst, tetrahydrofuran is selectively oxidized to γ-butyrolactone in the presence of an oxidant. It can be used for the resource-based conversion of byproduct tetrahydrofuran in a γ-butyrolactone / 1,4-butanediol liquid organic hydrogen storage cycle system, achieving closed-loop recycling of materials. Compared with existing technologies, the manganese-based catalytic system of this invention has advantages such as wide availability of raw materials, low cost, mild reaction conditions, and high product selectivity. It can effectively reduce the adverse effects of tetrahydrofuran accumulation on the system's economy during multiple hydrogen storage cycles, and has good prospects for industrial application.

This invention discloses a Ni-Ru-U composite MgH2 hydrogen storage alloy, prepared by ball milling Ni-Ru-U catalyst and MgH2 with tetrahydrofuran as a grinding aid. The phase structure comprises MgH2, Ni(OH)2, NiO, Ni2O3, and NiO2, and the particle size of the hydrogen storage alloy is 300-800 nm. The Ni-Ru-U catalyst is prepared by reacting RuCl3, NiCl2, block organic compound polyethylene glycol 200, and urea. The preparation method includes the following steps: 1. Preparation of the Ni-Ru-U catalyst; 2. Preparation of the Ni-Ru-U composite MgH2 hydrogen storage alloy. When used as a hydrogen storage alloy, the hydrogen absorption capacity reaches 6.70-6.90 wt.% at a hydrogen absorption time of 1 min; and the hydrogen release capacity reaches 6.20-6.36 wt.% at a hydrogen release time of 20 min.

This application belongs to the field of electrochemical energy storage technology, specifically relating to a lithium-ion battery and its preparation method. The lithium-ion battery includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte; the positive electrode includes lithium iron phosphate as the positive active material; the negative electrode includes sulfided polyacrylonitrile as the negative active material. The positive electrode of this invention uses olivine-type LiFePO4, which has an extremely stable structure, good thermal stability, and is not prone to releasing oxygen under overcharging or high temperatures; the negative electrode uses SPAN, where sulfur exists in a covalent bond form, avoiding the shuttle of soluble polysulfides and the resulting safety risks in traditional lithium-sulfur batteries. The entire battery system does not use a metallic lithium negative electrode, fundamentally eliminating the short-circuit hazard caused by lithium dendrite growth. Furthermore, through unique matching of positive and negative electrode materials, a working voltage of approximately 1.2V has been successfully achieved, filling the market gap for high-performance 1.2V rechargeable lithium-ion batteries.

This invention discloses a method for preparing a cobalt phosphide electrocatalyst with a tunable interfacial water hydrogen bond network and its application, belonging to the field of electrocatalytic materials. The invention uses cobalt nitrate, variable-valence metal chloride salts, and urea as raw materials to synthesize a hydroxide precursor, which is then subjected to a simple low-temperature phosphating reaction followed by in-situ oxidation and reconstruction during the oxygen evolution reaction of water electrolysis. The preparation method of this invention has advantages such as simple operation, high efficiency, environmental friendliness, strong controllability, and low cost. The prepared cobalt phosphide oxygen evolution electrocatalyst possesses advantages such as a tunable interfacial water hydrogen bond network, high stability, and excellent oxygen evolution activity.

The invention discloses a high-transmissivity amorphous zinc nitride film and a preparation method thereof, and relates to the technical field of semiconductor film materials.The preparation method comprises the following steps that firstly, a quartz substrate is selected as a substrate, metal zinc is selected as a sputtering target material, the distance between the substrate and the target material is adjusted, and a vacuum cavity cover is covered; vacuumizing, heating the substrate, introducing nitrogen and argon into a vacuum cavity, and pre-sputtering the metal zinc in a radio frequency magnetron sputtering mode without opening a target baffle; opening a target baffle, performing radio frequency magnetron sputtering on the pre-sputtered metal zinc, and depositing a zinc nitride film on the substrate; and finally, carrying out cooling treatment to obtain the amorphous zinc nitride film. According to the high-transmissivity amorphous zinc nitride film and the preparation method thereof, key parameters such as sputtering air pressure are controlled within a specific range, the growth kinetics of the film is effectively regulated and controlled, and the average transmissivity of the prepared amorphous zinc nitride film in a visible-near infrared light region is as high as 73%-86.6%.