83results about How to "Convenient shuttle" patented technology

The invention provides a preparation method for a three-dimensional carbon nanotube/nitrogen-doped graphene/sulfur electrode slice. The preparation method comprises the following steps of (1) adding the carbon nanotube, graphite oxide and polyacrylonitrile to N-methyl pyrrolidone, performing an ultrasonic reaction, coating an aluminium foil with mixed paste, and performing vacuum drying to obtain the electrode slice; (2) putting the obtained electrode slice into a muffle furnace under ammonia gas protection, heating to 400-500 DEG C, and naturally cooling; and (3) enabling the electrode slice obtained in the step (2) to be fully inserted into a Na2S2O3 solution, and slowly adding hydrochloric acid to the solution in a dropwise manner until the PH value of the solution reaches 6.5-7.5, taking out the electrode slice, and drying the electrode slice to obtain a positive plate. The electrode slice prepared by the invention can be directly used for the positive electrode of a lithium-sulfur battery without requiring a conductive agent and a binder, so that the cost of the electrode is greatly lowered.

The invention provides a preparation method for a boron-nitrogen-co-doped three-dimensional structured positive electrode material of a lithium-sulfur battery. The preparation method comprises the following steps of (1), adding graphite oxide into water for performing ultrasonic processing to form a graphene oxide suspension liquid; (2), adding ammonium hydroxide to the graphene oxide suspension liquid, and then adding sodium borohydride to the graphene oxide suspension liquid to obtain three-dimensional boron-nitrogen-co-doped graphene; (3), adding the three-dimensional boron-nitrogen-co-doped graphene obtained in the step (2) and ketjen black into N-methyl pyrrolidone for performing an ultrasonic reaction to form a suspension liquid; (4), adding sulfur to the N-methyl pyrrolidone for performing an ultrasonic reaction until the elemental sulfur is fully dissolved to form a suspension liquid; and (5), mixing the two kinds of suspension liquid obtained in the step (4) and the step (3), and then adding distilled water to obtain the three-dimensional structured positive electrode material of the lithium-sulfur battery. Due to sulfur adsorption by the synergistic effects of boron atoms and nitrogen atoms in the boron-nitrogen-co-doped graphene, the shuttle effect is lowered, so that the cycling life of the lithium-sulfur battery is prolonged.

The invention provides a lithium-sulfur battery positive electrode material and a preparation method thereof. The lithium-sulfur battery positive electrode material comprises a porous carbon material for accommodating sulfur and a metal sulfide loaded on the outer layer of the porous carbon material, wherein sulfur in the porous carbon material containing the sulfur comprises elemental sulfur with multiple pore channels and liquid metal in the pore channels of the elemental sulfur. The elemental sulfur with the multiple pore channels is adopted, so that the expansion of the electrode material can be reduced, and the ion conduction can be enhanced. The contact resistance between the carbon material and the elemental sulfur is reduced by the liquid metal in the elemental sulfur with multiple channels, and the contact area between the elemental sulfur and the conductor is increased, so that a catalytic effect is achieved on the elemental sulfur to form the polysulfide. Metal sulfides outside of carbon materials are capable of absorbing S<2-> formed in the discharging process. Through the synergistic adsorption catalysis effect of the liquid metal in the elemental sulfur with the pore channels and the metal sulfides wrapping outside the sulfur-loaded porous carbon, the electrode material is enabled to have high energy density and high cycling stability.

The invention provides an endoscopic liquid conveying pipe leakage and blockage ultrasonic detection device and method based on channel association. The device comprises soft fish-shaped inner detectors, an external passive sound label and an external active receiver. The soft fish-shaped inner detectors flow in a liquid conveying pipe along with liquid, and the pipe where the soft fish-shaped inner detectors flow through is detected through ultrasounds; and meanwhile, the external passive sound label with identity information is detected, and accurate positions of pipe defects are analyzed in cooperation with mileage recording. The external active receiver receives entrant sound signals transmitted by the soft fish-shaped inner detectors in the liquid conveying pipe on the outer side of the pipe, the passing time of the soft fish-shaped inner detectors is recorded, and the passing time of the multiple soft fish-shaped inner detectors can be combined to analyze which section of line is in blockage. By means of the method, each soft fish-shaped inner detector is provided with a plurality of ultrasonic receiving probes for full-directional receiving, and the multiple soft fish-shaped inner detectors conduct repeated detection, and the detection accuracy is high. The appearance of the soft fish-shaped inner detectors is in a fish shape, the size is small, the soft fish-shaped inner detectors are suitable for pipes with different pipe diameters, and use of an existing detector is not influenced.

The invention discloses a solid electrolyte, and belongs to the field of batteries. The solid electrolyte is provided with pore passages with a specific recognition function for conducting particles.Moreover, the invention discloses a preparation method of the solid electrolyte. The preparation method comprises the following steps: adopting a molecular imprinting technique to take polymer monomers and a lithium salt as functional monomers and the conducting particles as template molecules, adding an initiator and a cross-linking agent to be dissolved into a solvent for cross-linking polymerization so as to form a polymer network structure coated with the lithium salt and the conducting particles, then using an eluent to wash the conducting particles inside the polymer network structure, and after removing the solvent, forming the solid electrolyte provided with the pore passages with the specific recognition function for conducting particles. The invention also discloses a positive plate, a negative plate, an aluminum plastic film and an all-solid-state battery of the solid electrolyte. The solid electrolyte disclosed by the invention has high ionic conductivity, and is high in compatibility with a positive and negative interface and small in interface impedance, so that the electrical performance of the all-solid-state battery prepared by using the solid electrolyte is greatly improved.

The invention discloses a transition metal phosphide iron phosphide negative electrode material. The transition metal phosphide iron phosphide negative electrode material is prepared from the following steps that (1) water and N,N-dimethylformamide are mixed evenly; (2) an iron source and an organic ligand are added, stirring is conducted, and thus a mixed solution is formed; (3) sealing, heatingreaction, cooling, filtering, washing and drying are conducted to obtain yellow powder; (4) in inert atmosphere, roasting and cooling are conducted to obtain black powder; and (5) sodium hypophosphiteand the black powder are placed at the upstream part and the downstream part of a tubular furnace, in the inert atmosphere, roasting and cooling are conducted, and thus the transition metal phosphideiron phosphide negative electrode material is formed. The particle size of the negative electrode material is 400-600 nm, the transition metal phosphide iron phosphide negative electrode material isassembled into a battery, under the situation that the voltage is within the range of 0.1-3 V and the testing current is 100 mA.g<-1>, the first charge specific capacity reaches 1241 mAh.g<-1>, the first discharge specific capacity reaches 672 mAh.g<-1>, the capacity retention ratio after 100 cycles of circulating is greater than or equal to 95%, the preparation technique is simple in process, thereaction temperature is low, the cycle is short, and the cost is low.

The invention relates to a method for preparing a positive electrode composite material. The method comprises the following steps: adding activated carbon subjected to acid treatment to graphene oxide suspension to obtain a mixed solution; and then adding a sodium ascorbate solution to obtain graphene hydrogel; and drying the graphene hydrogel, mixing and grinding the dry graphene hydrogel with sulfur, calcining the mixture at 150-200 DEG C for 3-15h in an argon atmosphere to obtain a graphene/activated carbon/sulfur positive electrode composite material. The method for preparing the positive electrode material of lithium-sulfur batteries provided by the invention has the advantages that the used raw materials are cheap and easy to obtain, the preparation process is simple, the flow is short, the process is easy to control, and the industrial production is easy to realize.

The invention discloses a method for alcohol distillation and extraction on a fermented wine material. The method comprises the steps that a jacking mechanism drives a wine material loading mechanismto rise until a bottom wine material loading assembly is located in a main housing, rest wine material loading assemblies are located outside the main housing, and then wine materials are dumped to the inner part of the main housing; the jacking mechanism drives the wine material loading mechanism to fall until the wine material loading assembly which is the second from bottom to top is located inthe main housing, and the rest wine material loading assemblies above the wine material loading assembly are located outside the main housing; the wine material is dumped into the main housing, and the operations are reciprocated; high-temperature vapour flows to the inner part of the main housing, and alcohol steam is traced to flow to condensing equipment; after distillation is completed, the jacking mechanism drives the wine material loading mechanism to slowly rise, and personnel stir the waste wine material to the inner part of a discharging housing through tools of scoops and the like;and besides, discharging structural members are assisted for pushing the waste wine materials in the discharging housing to a discharging cylinder, and the waste wine materials are finally led by a cylinder housing to be discharged.

The invention provides a preparation method for a phosphorus-doped three-dimensional structured positive electrode material for a lithium-sulfur battery. The preparation method comprises the following steps of (1) adding graphite oxide into ethylene glycol, and performing ultrasonic processing to obtain a graphene oxide suspension liquid; (2) dissolving triphenylphosphine into ethylene glycol, and then adding the mixture into the graphene oxide suspension liquid; (3) adding the three-dimensional phosphorus-doped graphene obtained in the step (2) and ketjen black into N-methyl pyrrolidone, and performing an ultrasonic reaction to form a suspension liquid; (4) adding elemental sulfur into the N-methyl pyrrolidone, and performing ultrasonic processing until the elemental sulfur is fully dissolved to form a suspension liquid; and (5) mixing the two kinds of suspension liquid obtained in the steps (4) and (3), uniformly stirring, and slowly adding distilling water while stirring to obtain the three-dimensional structured positive electrode material for the lithium-sulfur battery. Due to the sulfur absorption effect of the phosphorus atoms in the phosphorus-doped graphene, the shuttle flying effect can be effectively reduced, and the cycling life of the lithium-sulfur battery can be prolonged.

The invention belongs to the field of biological genetic engineering, and provides a dual-promoter inducible secretable shuttle plasmid. The shuttle plasmid consists of an enzyme cutting Escherichia coli pET-28a plasmid and an enzyme cutting bacillus subtilis pE194 plasmid, wherein a lysozyme-antibacterial peptide functional fragment and an antibacterial peptide gene are inserted into the enzyme cutting Escherichia coli pET-28a plasmid. The invention also provides a method for constructing the dual-promoter inducible secretable shuttle plasmid. The shuttle plasmid is transferred to a prokaryote to express proteins such as toxalbumin, cecropin and the like in a fusion mode without toxicity to a host. The shuttle plasmid constructed by the method can be induced by IPTG or lactose to improve gene expression level; the shuttle plasmid is also suitable for exocrine expression, and a target protein for the exocrine expression is convenient to process and is not polluted by endotoxin; and because the shuttle plasmid has dual functional promoters, different genes can be inserted in appropriate correct directions for gene expression.

The invention belongs to the technical field of battery materials, and particularly relates to a gel electrolyte diaphragm, a preparation method thereof and a lithium ion battery. The gel electrolyte diaphragm comprises a high-molecular polymer material, lithium bis(trifluoromethanesulfonyl) imide and guanidine salt ionic liquid. The guanidine salt ionic liquid in the gel electrolyte diaphragm has the advantages of stability, no volatilization, long service life, high conductivity and the like, and nitrogen contains lone pair electrons which can be coordinated with metal ions and particularly have a strong attraction effect on Mn<2+>, so that Mn<2+> generated by disproportionation reaction of a lithium manganate material is extracted; and Mn<2+> is prevented from attaching to the negative electrode to cause capacity attenuation. The gel electrolyte diaphragm is a porous polymer diaphragm, is suitable for being used in a lithium manganate battery, and can effectively prevent Mn<2+> from migrating to a negative electrode through an electrolyte.

The invention discloses a method for synthesizing metal-phase vanadium/molybdenum disulfide/carbon cloth as a negative electrode material of a sodium-ion battery by a simple hydrothermal method. According to the invention, the carbon cloth is used as a substrate for in-situ growth of the nanosheet-shaped metal phase vanadium/molybdenum disulfide, and the nanosheet-shaped metal phase vanadium/molybdenum disulfide can be directly used as a negative electrode material of a sodium-ion battery without adding a conductive agent and a binder, so that the conductivity and utilization rate of the material are improved, and an ion intercalation barrier layer is reduced. Meanwhile, intercalation of vanadium can further enlarge the interlayer spacing of the material, and the charge-discharge specificcapacity and the cycling stability of the electrode material are remarkably improved. The sodium ion battery negative electrode material disclosed by the invention is simple in experimental operationand low in production cost, and has a wide industrial application prospect.

The present invention relates to an air compression type engine for aviation. The conventional aircraft engine is complicated in structure, consumes expensive aero fuel, and produces extremely loud noise during operation. Therefore, the present invention employs a turbo-charged air compressor to generate high temperature and high pressure gas in the pressure chamber, and uses the reaction thrust force generated by ejecting the compressed air through the nozzle to make the aircraft vertically take off/land, suspend in the air and fly forwardly. Benefited from the simple structure, the manufacture cost of the aircraft engine can be dramatically decreased. Vertically raising and landing the aircraft can be achieved by changing the ejection directed of the compressed air in the pressure chamber. The commonly used gasoline or diesel, which is cost saving and capable of combusting with a high combustion value, can be used instead of the expensive aviation kerosene. Further, the generated noise is quite small. By means of above arrangement, it is possible to manufacture a jet type manned craft like a car, which can be operated by common people to vertically take off/land and shuttle conveniently in the downtown area through simple operation procedure.

The invention relates to extraction and extraction equipment of a rose cell sap raw material for skin care, and belongs to the field of rose cell sap preparation, the extraction and extraction equipment comprises a main frame body, a freezing device and an extraction device are installed on the main frame body, the freezing device comprises a freezing tank, a pushing mechanism and a freezing mechanism, and the freezing mechanism is used for supplying cold air subjected to water removal treatment into the freezing tank; the pushing mechanism is used for pulling the frozen roses to move into the extracting device, the extracting device comprises an extracting mechanism, an air heater and a condenser, and the extracting mechanism is used for receiving the frozen roses and crushing the roses; the air heater is detachably communicated with the air inlet end of the extraction mechanism and is used for supplying dry, low-pressure and low-temperature hot air into the extraction mechanism, and the condenser is detachably communicated with the air outlet end of the extraction mechanism and is used for receiving the air doped with the rose cell sap and condensing the air to obtain the rose cell sap; an extraction tank in the extraction mechanism can rotate around a rotating shaft.

An edge network switching method based on dynamic mobile device behavior prediction belongs to the technical field of flow control, and comprises the following steps: S1, establishing an edge node architecture; S2, establishing a service handshake linkage mechanism of a first layer; executing the step 3 and the step 4 at the same time; S3, if the number of the mobile devices served by the edge computing server is overloaded, adjusting the deployment of the mobile devices; S4, establishing and updating a mobile prediction model: adopting a hidden Markov model and redefining parameters; S5, enabling the edge computing server to judge whether the mobile device moves or not; S6, enabling the edge computing server to enable the mobile device and the target edge computing server to establish service handover; and enabling the edge computing server to trigger a second service handshake linkage mechanism. According to the scheme, the hidden Markov model is adopted to predict the network switching trend of the mobile device, so that an edge computing server for preparing service in advance is reduced.