57results about How to "Reduce layer spacing" patented technology

The invention discloses a bionic flexible pressure sensor based on a lotus leaf micro-spinous-process/MXene composite structure. The sensor comprises a pressure-sensing layer being polydimethylsiloxane (PDMS) with a micro-spinous-process structure on the surface of a lotus leaf, a pressure treatment layer being a multilayer Ti2C-MXene film, and a signal output layer being a flexible electrode andbeing used for supporting and protecting the Ti2C-MXene film and outputting an electrical signal converted by the pressure signal. According to the bionic flexible pressure sensor based on a lotus leaf micro-spinous-process/MXene composite structure, the sensor has excellent characteristics of high sensitivity, wide linearity, low response time, high stability and the like without the complicatedstructure design and manufacturing process.

The present invention relates to a method for preparing graphene from a biomass-derived carbonaceous mesophase, which includes: soaking a base substance into an ethanol solution of a biomass-derived carbonaceous mesophase; after a certain period of time, taking out and drying the base substance, a layer of biomass-derived carbonaceous mesophase film being attached to the surface of the base substance; subjecting the base substance to a heat treatment under the protection of a hydrogen atmosphere, then a stacked graphene film was formed on the surface of the base substance; and further subjecting the base substance to ultrasonic dispersion in an alcohol solvent to separate the graphene film and the base substance, then a graphene alcosol was formed. The preparation process of the present invention is easy to implement. The raw material biomass-derived carbonaceous mesophase has abundant sources and is low in cost. The preparation process has low energy consumption, and is applicable to mass production. The obtained graphene film and graphene alcosol can be used in solar cells, nano-electronic devices, sensors, and so on, and have broad market prospects.

The invention discloses a heat processing technology of a high-carbon carbon steel coil rod for a steel wire rope. The heat processing technology is characterized by comprising the following steps of: carrying out hot rolling, water passing and cooling and coiling on the high-carbon carbon steel coil rod with the diameter of 6mm-16.5mm so as to obtain coil rod; when the prepared coil rod reaches the temperature range of 820 DEG C-900 DEG C, rapidly throwing the coil rod in a salt groove to keep for 2 seconds-40 seconds in salt bath lower than sorbite temperature at constant temperature; and then putting the coil rod into salt bath or lead bath with the sorbite temperature range to keep at constant temperature for 5 minutes-15 minutes, taking out and cooling naturally, thereby completing the heat processing technology of the high-carbon carbon steel coil rod for the steel wire rope. The heat processing technology of the high-carbon carbon steel coil rod for the steel wire rope can effectively refine the sorbite clique size and interlayer spacing and can improve the uniformity of interlayer spacing; and the product has the advantages of high intensity plasticity, excellent fatigue resistance, long service and the like. The heat processing technology of the high-carbon carbon steel coil rod for the steel wire rope has an obvious effect of improving the high plasticity of a coil rod wire material.

The invention relates to the technical field of lithium batteries, inp articular to a low-temperature cycle iron phosphate lithium-ion power battery and a preparation method of the low-temperature cycle iron phosphate lithium-ion power battery. The low-temperature cycle iron phosphate lithium-ion power battery comprises a positive electrode, a negative electrode and an electrolyte, the positive electrode comprises lithium iron phosphate, the average particle size distribution D50 of the volume of the lithium iron phosphate is 0.5-2 [mu]m, the tap density of the lithium iron phosphate is 0.8-1.5 g/cm<3>, the specific surface area of the lithium iron phosphate is 6-12 m<2>/g, the negative electrode comprises a green coke pulverized super-high temperature graphitized material, the particle size distribution D50 of the green coke pulverized super-high temperature graphitized material is 2-10 [mu]m, the tap density of the green coke pulverized super-high temperature graphitized material is1.2-2 g/cm<3>, and the specific surface area of the green coke pulverized super-high temperature graphitized material is 0.5-1.5 m<2>/g. The positive electrode and the negative electrode are modified,so that the low-temperature cycle performance of the lithium battery is improved.

The invention provides an apical impulse sensor based on a reduced graphene oxide film with a bilayer buckling structure, belonging to the field of reduced graphene oxide sensors. A reduced graphene oxide film flexible sensor with a buckling structure is formed by carrying out suction filtration on a reduced graphene oxide water liquid to form a film, transferring reduced graphene oxide onto a flexible polydimethylsiloxane (PDMS) substrate which is pre-stretched by 30%, connecting copper wire electrodes at the two ends of reduced graphene oxide respectively, then relaxing reduced graphene oxide to return to the original state, cutting the reduced graphene oxide flexible film from the middle and folding the reduced graphene oxide flexible film in half so that the reduced graphene oxide layers come into contact with each other. The reduced graphene oxide film flexible sensor with a buckling structure has large specific surface area and excellent electrical conductivity and mechanical properties. A preparation method of the reduced graphene oxide sensor is mild in preparation conditions, controllable in technological parameters and low in cost, is simple and practicable and has high repeatability. The sensor can be attached to human skins and is used for testing the apical impulse.

The invention provides a preparation method of a cathode material precursor. The preparation method comprises the following steps of: mixing a nickel-containing compound, a cobalt-containing compound and a manganese-containing compound to obtain a mixed solution; mixing the mixed solution, a complexing agent, a precipitating agent and a metallic-colloid precursor, and reacting to obtain the cathode material precursor. In the process of preparing the cathode material precursor, nano metallic colloid forms double electrode layers on the surface of the precursor by co-precipitation reaction, so that the thickness increase of primary particles of the precursor is inhibited, the interlamellar spacing of a lamellar structure of the primary particles is reduced and the cathode material precursor of a lithium-ion battery aggregated by a hexagonal and lamellar structure is prepared. The application also provides a cathode material prepared by the cathode material precursor. The cathode material prepared by the application has the advantages that the hexagonal and lamellar primary particles have shorter lithium-ion migration path and better electrolyte wettability, so that the rate capacity of the cathode material can be increased, and the cathode material is especially applicable to manufacturing the lithium-ion power battery.

The invention discloses a method for preparing graphene with solid phase assisted microwaves. The method comprises the following steps: a graphite oxide and water mixed solution is subjected to ultrasonic treatment for 10 min-1 h, then a suspension obtained after ultrasonic treatment is centrifuged under the condition of 2000-3000 rpm for 20-60 min, a supernatant liquid obtained after centrifugation is graphene oxide colloid, the graphene oxide colloid is dried, and graphene oxide is obtained; graphene oxide and an assisted wave absorbing material are placed into a reaction chamber of an industrial microwave oven and react under the power of 300-2000 W for 15-90 s with inert gas shielding, then the microwaves are stopped, and graphene is obtained after cooling to the room temperature. Any chemical reagent harmful to the human body and the environment is not required to be added in the reaction process, and safety and environmental protection are realized; the preparation process is simple, the reaction time is short, and high efficiency and energy saving are realized.

The invention relates to a preparation method of a lithium-ion battery with high rate performance. The preparation method comprises the steps of adopting an active material with the particle size D50 of 1.0-1.5 microns as a cathode active material; mixing the cathode active material, a conductive agent and a binder with a solvent, and mixing and dispersing to obtain negative electrode paste; coating the negative electrode paste on a current collector according to a coating weight per unit area of 255+/-5 g/m2 and drying to obtain a negative electrode piece; adopting an active material with the particle size D50 of 8.0-8.5 microns as an anode active material, mixing the anode active material, the conductive agent and the binder with the solvent, and mixing and dispersing to obtain active electrode paste; coating the active electrode paste on the current collector according to a coating weight per unit area of 121+/-5 g/m2 and drying to obtain a positive electrode piece, wherein the conductive agent comprises a tube bundle conductive agent and a granular conductive agent; and assembling the negative electrode piece, the positive electrode piece and a diaphragm to form a battery. The battery prepared by the preparation method has the advantages such as short charging time and excellent rate performance.

The invention discloses a wing-plate horizontal three-phase separation device and a separation method thereof. The wing-plate horizontal three-phase separation device comprises a pre-separation tube and a separation dehydration container; the lower part of the separation dehydration container is partitioned into an oil-water separation chamber and an oil chamber by an oil overflow weir plate, andthe upper part is a gas phase space, and a large dip angle folio wing plate body is arranged in the oil-water separation chamber. After processing the three-compound combination flooding ultra-high water-containing oil-gas-water mixture by adopting the wing-plate horizontal three-phase separation device and the separation method disclosed by the invention, the water content of the outlet oil doesnot exceed 10%, and the oil content of the outlet water does not exceed 1000mg/L, the processing capacity and the efficiency are about doubled in comparison with the conventional three-phase separator; the processing effect is much better than the conventional three-phase separator, the equipment cost of the unit processing liquid volume is reduced by 30-70%, the sediment deposition is avoided, and the separation device can be efficiently used for a long time.

The invention discloses a composite electrolyte and application thereof, the composite electrolyte comprises a gel electrolyte coated on a lithium negative electrode and a quasi-solid electrolyte coated on a positive electrode, and the gel electrolyte is in contact with the quasi-solid electrolyte; electrolyte is adsorbed in the quasi-solid electrolyte; both the gel electrolyte and the quasi-solidelectrolyte contain the same conductive lithium salt; the invention also discloses application of the composite electrolyte to a lithium ion battery. According to the invention, through cooperation of the two electrolytes, lithium dendrites are inhibited, and the composite electrolyte is ensured to have good conductivity.

The invention relates to the technical field of lithium batteries, in particular to a negative electrode material and a negative electrode of a lithium battery, the lithium battery and preparation methods thereof. The negative electrode material of the lithium battery comprises a negative electrode active material, a conductive agent and a binder, wherein the negative electrode active material comprises an ultra-high-temperature graphitized material of smashed green cokes, wherein the particle size distribution D50 of the ultra-high-temperature graphitized material of the smashed green cokes is 2-10 micrometers, the tap density thereof is 1.2-2 g/cm<3>, and the specific surface area is 0.5-1.5 m<2>/g. The ultra-high-temperature graphitized material of the smashed green cokes serves as thenegative electrode active material, and the compaction density and the tap density of the ultra-high-temperature graphitized material of the smashed green cokes are enhanced to decrease its interlayerspacing, increase space utilization rate and reduce interlayer spacing, so that the low-temperature charge and discharge performance and the cycle performance of the negative electrode material are improved.

The invention relates to a secondary battery including a positive electrode pole piece, a negative electrode pole piece, an isolating membrane and an electrolyte. The positive electrode pole piece includes a positive active material layer containing a ternary positive electrode material. The negative electrode pole piece includes a negative active material layer, and active materials contain a carbon material A and a carbon material B. The carbon material B has a high reversible capacity and cooperates with the ternary positive electrode material to achieve a high gram capacity of the battery.Compared with the carbon material B, the carbon material A has a low degree of graphitization, a relatively large interlayer spacing and higher mechanical strength. The combination of the two carbonmaterials ensures that the negative electrode pole piece has both high reversible capacity and good pressure resistance, and the cycle life of the battery is improved.

The invention discloses a formation method for improving the K value of a soft-package battery cell, which solves the problems of poor film formation of an SEI film formed by normal pressure formationof the soft-package battery cell, deformation and insufficient hardness of a battery cell main body, black spots on an interface, lithium precipitation and the like, and also solves the problem of high K value reject ratio caused by the formation of a high-temperature and high-pressure clamp of the soft-package battery cell. According to the invention, in the formation step operation process, theinterlayer spacing between the positive electrode and the diaphragm and the interlayer spacing between the negative electrode and the diaphragm can be reduced by applying a small surface pressure tothe surface of the battery cell, and the migration path of lithium ions in the formation process is further reduced, so that the film forming quality is improved, the internal activity of the batterycell can be improved by controlling the temperature of a clamping plate, and the migration difficulty of the lithium ions is reduced. The method has the advantages that the SEI film forming quality ishigh, the main body of the battery cell is not easy to deform, and the K value of the battery cell is stable.

The invention relates to a machine-made sand wind power winnowing system and a machine-made sand wind power winnowing method capable of realizing the selection of machine-made sand of different grain sizes through wind power and capable of realizing the dust-free performance of the machine-made sand. The system comprises a programmable logic controller (PLC), wherein a discharging hole of a mixed finished product bucket elevator faces an inlet of a buffer bin; a discharging hole of the buffer bin faces an inlet of a feeder; an outlet of the feeder is communicated with a charging hole of a cabin body of a machine-made sand wind power winnower; a plurality of stages of discharging holes of the cabin body of the machine-made sand wind power winnower are communicated with inlets of self grading storage tanks through conveying pipes respectively; a wind outlet of a main fan is communicated with a main wind port in the cabin body of the machine-made sand wind power winnower; a wind outlet of an auxiliary fan is communicated with an auxiliary wind port in the cabin body of the machine-made sand wind power winnower; a dust removal port in the cabin body of the machine-made sand wind power winnower is communicated with an inlet of a dust remover.

The invention discloses a CC-NiO-CuCoS composite material. The CC-NiO-CuCoS composite material is composed of CC, NiO and CuCo2S4, wherein CC is a base material, the microstructure of CC is of a fibrous structure, and CC is used for providing a substrate, so NiO nanosheets cannot be stacked, and the conductive substrate is beneficial to ultra-high-speed transportation of electrons; the microstructure of NiO is a nanosheet structure, and NiO is loaded on the surface of CC and is used for providing extra pseudocapacitance; and the microstructure of CuCo2S4 is a nano-particle structure, and CuCo2S4 is attached to the surfaces of the CC and NiO nanosheets, and is used for stabilizing the sheet structure of NiO and covering a part of exposed CC. According to the invention, the CC-NiO-CuCoS composite material is prepared from CC, nickel nitrate hexahydrate, ammonium fluoride, urea, cupric acetate monohydrate, cobalt acetate tetrahydrate and thiourea are used as initial raw materials throughtwo-step hydrothermal preparation. The preparation method comprises the following steps of (1) cleaning and activation of CC; (2) preparation of a CC-NiO composite material; and (3) preparation of theCC-NiO-CuCo2S4 composite material. When the composite material is used as a supercapacitor electrode material, specific capacitance is 840 F g<-1>, and cycling stability after 3000 cycles is 100%.

The invention discloses a bookshelf with adjustable layer spacing, comprising a partition, a bottom plate and a side plate, two side plates are symmetrically fixed on the bottom plate, and each side plate is provided with a chute, and each At least two insertion holes are opened in each of the sliding grooves along the vertical direction, and the insertion holes in the two sliding grooves are arranged horizontally symmetrically, and the two ends of the partition plate are horizontally fixed to the two sides by inserting rods. The invention solves the problem that slightly larger books cannot be neatly placed on the bookshelf due to the fixed layer spacing of the existing bookshelf, and has simple design and convenient use.

The invention discloses a functionalized graphene/polyaniline composite filter membrane and a preparation method thereof, and aims to provide a membrane material used for water treatment. The grapheneoxide/polyaniline composite membrane comprises a matrix, functionalized graphene oxide and polyaniline grafted on the surface of a functionalized graphene oxide membrane. The preparation method comprises the following steps: functionalizing the graphene oxide, preparing a membrane on the matrix, immersing the matrix with the membrane in a mixed acid solution of aniline and ammonium persulfate, performing a reaction for a certain time, taking out the obtained material, and removing the polyaniline on the surface to obtain the functionalized graphene oxide/polyaniline composite filter membrane.The functionalized graphene oxide/polyaniline composite filter membrane has the advantages of simple preparation process, low cost and good purification effect.

The invention discloses a compound flat plate settling unit, which comprises multiple circular flat plates arranged on a bracket in parallel, wherein a flange is formed in the outer periphery of each flat plate, a sewage storage chamber is arranged at the outside of the flange and is communicated with a flat plate through the groove opening of the flange; a sludge channel is formed between each two adjacent sewage storage chambers in the bracket; and a rotary mud scrapping part is arranged in each flat plate and is connected with a driving device through a transmission part. The invention further relates to the setting process using the compound flat plate settling unit. By adopting the method, the settling area is effectively increased; the surface hydraulic load is reduced; the sludge-water separation effect is improved; the discharged water quality is improved; the highly concentrated active sludge of the system is maintained and the occupied area of a settling pool is remarkably saved.

The invention relates to the field of vibratory screening machinery, and mainly relates to rapid replacement of a screen surface of a multilayer vibrating screen from a second layer to below and realization of a modularized drawer-type multilayer vibrating screen of the multilayer screening modularization and a manufacture method thereof in the production of the vibrating screens. The modularized drawer-type multilayer vibrating screen comprises a multilayer vibrating screen body, a sieve plate of the multilayer vibrating screen body is the modularized drawer-type multilayer vibrating screen, and the modularization drawer-type multilayer vibrating screen is in pull-draw match with a case body; the modularized drawer-type multilayer vibrating screen comprises module-combined type screen bracket devices, bracket sliding rails, a screen bracket hold-down gear and a bracket drawing device; two bracket sliding rails are fixedly arranged on the sidewall panel of the vibrating screen; the module-combined type screen bracket devices are arranged on the surface of each of the two bracket sliding rails; screens are respectively arranged on the module-combined type screen bracket devices; the bracket drawing device is arranged at top end of the sidewall panel of the vibrating screen; and the module-combined type screen bracket devices are connected with load cables of the bracket drawing device.

The invention discloses a graphene membrane continuous sewage filtering device and a filtering method and belongs to the technical field of sewage treatment. The graphene membrane continuous sewage filtering device disclosed by the invention comprises a sewage water inlet, a membrane treatment system, a dirt collection tank and a water collection tank. According to the graphene membrane continuoussewage filtering device, a pipeline in a membrane treatment system and a solenoid valve pipeline control part are arranged, so that sewage continuously enters from the sewage water inlet; the sewageis filtered through the membrane treatment system; when a filtering membrane in the system reaches a certain adsorption amount and needs to be subjected to backwashing, water input of sewage does notneed to be interrupted; a solenoid valve is regulated to control filtered water to carry out the backwashing directly along the movement direction of water in the pipeline, so that a positive filtering process and a backwashing process of the sewage are mutually independent and does not interfere with each other. By adopting the graphene membrane continuous sewage filtering device and the filtering method, the sewage can be continuously filtered; the filtering membrane has high permeability, long service life and high sewage treatment efficiency.