35results about How to "Fast migration rate" patented technology

The invention provides a surface-modified high-nickel ternary positive material. A surface modification layer is covered on an inner core of a high-nickel ternary positive material; the inner core ofthe high-nickel ternary positive material is Li1 plus kNixCoyMzO2, wherein k is larger than or equal to -0.1 and smaller than or equal to 0.1, x is larger than 0 and smaller than 1, y is larger than 0and smaller than 1, and z is larger than 0 and smaller than 1. The surface modification layer is formed by two surface modification matters, wherein one is yttria-stabilized zirconia, and the other one is selected from one or more of metal oxide MeOx, metal fluoride MeFx, metal phosphate Me(PO4)x or C. The invention also provides a preparation method of the surface-modified high-nickel ternary positive material, and a battery prepared from the surface-modified high-nickel ternary positive material. According to the surface-modified high-nickel ternary positive material provided by the invention, the surface modification matters are covered on the surface of the body material, so that the side reaction of the high-nickel ternary positive material and an electrolyte is reduced, the irreversible capacity loss of the material is inhibited, and the cycle performance is improved.

The invention discloses an AlGan material-based ultraviolet photoelectric detector structure and a manufacturing method thereof, which are mainly used for solving the problem of the dependence on a P-type doping material in the prior art. A detector comprises a substrate (1), a transition layer (2), a GaN buffer layer (3), an aluminum component gradual change AlGaN layer (4) and an active layer (5) from bottom to top, wherein the aluminum component gradual change AlGaN layer (4) is partitioned into an upper layer and a lower layer; the thickness of the lower layer is 20-30 nanometers, and thecontent of an aluminum component increases from 0 percent to 80-100 percent; the thickness of the upper layer is 10-20 nanometer, and the content of the aluminum component is 0-80 percent; the left upper side of the aluminum component gradual change AlGaN layer (4) is covered by the active layer (5); a bottom ohmic contact (7) is deposited on the right upper side of the aluminum component gradualchange AlGaN layer (4); a gap (8) is formed between the ohmic contact and the active region; the active region (5) consists of an AlGaN material with the aluminum component content of 0-80 percent; the thickness of the active region (5) is 50-100 nanometers; and a surface ohmic contact electrode (7) is deposited on the surface of the active region. The detector structure has the advantages of capability of automatically working in a photovoltaic mode, high high-frequency characteristic and small dark current, and can be applied to optical signal detection in ultraviolet wavebands between 226 nanometers and 363 nanometers.

The invention relates to the technical field of microbial fuel cells, in particular to a method for preparing a microbial fuel cell electrode material employing rape stalks. The method comprises the steps as follows: rape stalks are sheared, dried and mixed with an H2SO4 solution in a hydrothermal reactor; the mass concentration of H2SO4 is 10%, 30% or 50%; reaction is carried out at 150 DEG C for 3 hours; the solution is cooled and then subjected to suction filtration to neutrality; the product is mixed with distilled water at the ratio of 1 to 1.5; the mixture is further put into the hydrothermal reactor, reacts at 120 DEG C for 3 hours, and is dried after suction filtration to obtain hydrothermal carbon; the sample is carbonized in a nitrogen condition in a tube furnace; the carbonization temperature is 400 DEG C; the heating rate is 10 DEG C/min; the nitrogen flow rate is controlled at 0.6L/min; the carbonized sample is soaked with 5wt% HCl for 6 hours and washed to neutrality; and the product is soaked with 3wt% HF for 6 hours, washed to neutrality and dried. The method is simple; and the prepared electrode is large in specific surface area, high in specific capacitance, good in biocompatibility, high in electron transfer rate and good in electricity production effect.

The invention discloses a room temperature NO2 sensor based on an rGO-Co3O4 compound and a preparation method of the room temperature NO2 sensor and belongs to the technical field of semiconductor metallic oxide gas sensors. The room temperature NO2 sensor consists of an Al2O3 insulating ceramic tube sold in the market, a semiconductor sensitive material and a nickel-chromium alloy heating coil, wherein the Al2O3 insulating ceramic tube is provided with two annular golden electrodes; the semiconductor sensitive material is applied to the annular golden electrodes and the Al2O3 insulating ceramic tube; the nickel-chromium alloy heating coil penetrates through the Al2O3 insulating ceramic tube. Due to adoption of the rGO-Co3O4 compound sensitive material prepared by using a combined hydrothermal and water bath method, and by virtue of a high specific surface area, a large gas adsorption capacity, a rapid charge carrier migration velocity and good conductivity of graphene, and the synergism of the graphene with Co3O4, surface chemical reactions of a detected gas are enhanced, charge migration between rGO and Co3O4 is caused, the sensitivity property of the sensor upon NO2 is effectively improved, and in addition the working temperature of a device can be reduced to a room temperature. The room temperature NO2 sensor is simple in process, small in size, applicable to large-scale production and thus wide in application prospect in detecting the content of NO2 in microenvironments.

The relates to a room-temperature NO2 sensor based on graphene-coated alpha-Fe2O3 compound and a preparation method thereof, which belong to the technical field a semiconductor metal oxide gas sensor.The sensor comprises a sold Al2O3 insulation ceramic tube having two annular gold electrodes, a semiconductor sensitive material coating the annular gold electrode and the Al2O3 insulation ceramic tube, and a nickel-chromium alloy heating coil passing through the Al2O3 insulation ceramic tube. The graphene-coated alpha-Fe2O3 compound sensitive material is obtained by water bath and a hydrothermalmethod, a high specific surface area of graphene, gas adsorption capability, a fast carrier migration rate and good conductivity, and heterojunction formed between graphene and the alpha-Fe2O3 are used, so that a chemical reaction of the surface of detected gas is increased, charge transfer between rGO and alpha-Fe2O3 is formed, sensitive characteristic of the sensor on NO2 is effectively increased, work temperature of the sensor is reduced to room temperature, and the sensor has a wide application prospect on the NO2 content aspect in detection microenvironment.

The invention discloses a MOS transistor and a manufacturing method therefor. In order to improve the carrier migration rate of the MOS transistor, the size of an opening of a bowl-shaped groove is controlled during the forming of a sigma-shaped groove, so as to enable the size of the opening to be greater than the distance between side walls of the adjacent grid structures. In other words, the size of the opening of the bowl-shaped groove is controlled to be great as much as possible, thereby enabling the size of the opening of the sigma-shaped groove formed by the corrosion of the bowl-shaped groove to be greater, enabling pressure stress materials or tensile stress materials placed in a source-drain region to be more, enabling the tensile stress or pressure stress applied to a trench to be greater, and enabling the carrier migration rate to be greater.

The invention provides a method for stripping Bi3O4Cl by using a cell disintegrator. The method comprises the following steps: taking water as a solvent, Bi (NO3) 3-5H2O as a Bi source and tetracycline hydrochloride as a Cl source, preparing a Bi-O-Cl complex by adopting a hydrothermal method, then preparing a block Bi3O4Cl photocatalyst (B-Bi3O4Cl) by adopting a sintering method, carrying out ultrasonic stripping on the B-Bi3O4Cl through the cell disintegrator to prepare ultrathin Bi3O4Cl nanosheet (S-Bi3O4Cl) so as to improve the photocatalytic performance of the ultrathin Bi3O4Cl nanosheet.The Bi3O4Cl photocatalyst is prepared by combining the hydrothermal method and the sintering method, the prepared Bi3O4Cl is of an irregular block structure in appearance, and the thickness of the Bi3O4Cl is about 200-400 nm; the prepared block Bi3O4Cl photocatalyst is subjected to ultrasonic stripping by using the cell disintegrator, so that the Bi3O4Cl is stripped into Bi3O4Cl nanosheets from blocks, the thickness of the nanosheets is about 10-50 nm, and the ultrathin nanosheets enable the migration rate of photon-generated carriers of the nanosheets to be high and the separation efficiencyto be high; and the material has good photocatalytic reduction performance on CO2.

The invention belongs to the field of nano materials, and discloses a preparation method of a carbon material loaded tubular carbon nitride photocatalyst. The photocatalyst with large specific surface area, multiple active sites, high photon-generated carrier separation and migration rate, low photon-generated carrier coincidence rate, visible light absorption red shift, high photocatalytic activity and high stability is obtained by adjusting the mass fraction of the carbon material. The preparation method comprises the following steps: S1, uniformly mixing the carbon material with sodium chloride, potassium chloride, lithium chloride and melamine, and calcining in a corundum crucible; in the step S1, the preparation method of the carbon material comprises the following steps: (1) cutting the white part of the shaddock peel into blocks, drying, soaking in a KOH solution, and freeze-drying; (2) calcining a sample in a tubular furnace, and washing the sample with HNO3 and ultrapure water until the sample is neutral to obtain a carbon material; and S2, washing the product with ultrapure water and ethanol, drying and collecting. The photocatalyst obtained by the invention promotes the improvement of the hydrogen production performance by photolysis of water, and provides a new thought for further development of efficient photocatalysts.

The invention relates to the technical field of photocatalytic materials, in particular to a preparation method of a 2D/1D heterojunction photocatalyst and an application of the 2D/1D heterojunction photocatalyst in antibiosis, and the preparation method of the 2D/1D heterojunction photocatalyst comprises the following steps: synthesizing a 1D porous In2O3 nanotube as a support semiconductor by a simple calcination method; and performing in-situ growth of a 2D ultrathin ZnIn2S4 nanosheet on the surface of the 1D porous In2O3 nanotube through a low-temperature oil bath process so as to construct the efficient visible light driven 2D ZnIn2S4/1D In2O3 heterojunction photocatalyst which is used for inactivating pathogenic microorganisms. The method has the advantages that the method is simple and convenient, the cost is low, and the material prepared by the method has the advantages of accelerating the separation and migration rate of photon-generated carriers and the generation of active species such as superoxide radicals, and has excellent photocatalytic antibacterial activity.

The invention discloses a data migration method and system, a storage medium and electronic equipment. The data migration method comprises the following steps: an acquisition step: acquiring link information of a data source table and link information of a target table; a processing step: performing data synchronization on the data source table and the target table through spark according to the link information of the data source table and the link information of the target table; a checking step: checking the synchronized data; and a dag construction step: constructing a dag-based operation interface according to the data source table, the migration device and the target table. According to the data method, the complexity of data cross-platform synchronization can be simplified, data migration can be achieved in an interface and dragging mode, data synchronization of different platforms is efficiently achieved by constructing the DAG, the supported platforms are multiple in type, and the migration speed is high.

The invention discloses a device and method for cooperatively treating pickling waste liquid and electroplating sludge by using an electrodialysis technology. The device comprises an anode region, a cathode region and a proton exchange membrane arranged between the anode region and the cathode region, wherein an anode electrode is arranged in the anode region; the anode electrode is connected witha positive electrode of a power supply; the cathode region is internally provided with a cathode electrode; and the cathode electrode is connected with a negative electrode of the power supply. The method for cooperatively treating the pickling waste liquid and the electroplating sludge by using the electrode electrodialysis technology comprises the steps that the pickling waste liquid is added into the anode region, the electroplating sludge and water are added into the cathode region to form electroplating sludge water, the power supply is turned on and the device is started, and under theaction of a direct current, hydrogen ions in the pickling waste liquid in the anode region enter the cathode region through the proton exchange membrane to react with the electroplating sludge so as to promote the dissolution of heavy metals in the electroplating sludge. The purpose of treating waste by waste is achieved, and the device and method conform to the concept of sustainable development.

The invention belongs to the technical field of solid-state batteries, and particularly relates to a composite solid-state electrolyte, which comprises an inorganic electrolyte framework and a polymer electrolyte, the inorganic electrolyte framework comprises two opposite surfaces, at least one surface of the inorganic electrolyte framework is provided with a plurality of holes extending towards the other surface, the holes are filled with the polymer electrolyte, and the polymer electrolyte at least wraps the surface, provided with the holes, of the inorganic electrolyte framework. The composite solid electrolyte provided by the invention is high in ion migration rate, uniform in ion distribution and diffusion and good in stability; and the electrolyte and the electrode are tightly combined, so that the interface impedance can be reduced. The cycle stability, the charge-discharge effect and other performance of the solid-state battery are improved, and the electrochemical performance of the battery is improved.

The invention provides a preparation method for a lithium-iron phosphate cathode material. The preparation method comprises the following steps: (1) adding a first lithium source, a phosphorus source,an iron source and a first carbon source into a first solvent containing a complexing agent so as to obtain a mixed solution, carrying out uniform mixing under stirring at a temperature of 400 to 450DEG C, and carrying out drying and crushing treatment so as to obtain a precursor 1; (2) uniformly mixing iron phosphate particles with a second lithium source according to a molar ratio of 1: (1.03-1.1), then adding a second carbon source, a second solvent and doped metal salt, carrying out full mixing, then carrying out grinding for 3 to 8 hours, and carrying out drying and crushing treatment so as to obtain a precursor 2; (3) uniformly mixing the precursor 1 and the precursor 2 according to a mass ratio of 1: (0.5-3) so as to obtain a mixed precursor, and carrying out sintering at a high temperature in an inert or reducing atmosphere so as to obtain crude lithium-iron phosphate; and (4) crushing and drying the crude lithium-iron phosphate in an air-stream mill, and carrying out collection so as to obtain the lithium-iron phosphate cathode material. The invention also provides a lithium ion battery.