54results about How to "Shorten the conduction distance" patented technology

The invention relates to a novel carbon-sulfur compound for an anode material of a lithium-sulfur battery and a preparation method thereof. Sulfur is filled into a nano and micron hole of a matrix in an elementary substance way by taking a macroporous carbon material with high pore volume, electrical conductivity and specific surface area as the matrix, and the sulfur and carbon can also carry out combination reaction so as to prepare the novel carbon-sulfur compound of which the sulfur exists in one or more chemical states in a carbon material. The novel carbon-sulfur compound used as the anode material of the lithium-sulfur battery has the advantages that the high pore volume has large contained sulfur contents and can ensure high electric capacity; the small granularity of the sulfur can reduce a conductive distance between ions and electrons and increase the utilization ratio of the sulfur; and the adsorption characteristics of the high specific surface of the carbon material can inhibit a discharging intermediate product from dissolving and moving towards a cathode, reduce the self discharge, prevent a nonconductive discharging product, namely lithium sulfide from largely accumulating outside carbon particles and reduce internal resistance, therefore, the material can improve the specific energy, the specific power and the cycle performance of the lithium-sulfur battery.

The invention provides a three-dimensional nanometer porous copper / two-dimensional cuprous oxide nanosheet array type lithium ion battery negative electrode. The lithium ion battery negative electrode comprises a three-dimensional nanometer porous copper substrate and a cuprous oxide nanosheet array layer, the three-dimensional nanometer porous copper substrate is used as a current collector, the cuprous oxide nanosheet array layer is used as an active lithium storage layer, the cuprous oxide nanosheet array is arranged on a surface of the substrate and is integrated with the substrate, and the cuprous oxide nanosheet array layer comprises cuprous oxide nanosheets formed on the substrate through in-situ growth, and the cuprous oxide nanosheets are perpendicular to the three-dimensional nanometer porous copper substrate and are arranged in a staggered manner to form an array structure. By the lithium ion battery negative electrode, the cycle performance and the specific capacity of the lithium ion battery can be improved. The invention also provides a one-step preparation method of the abovementioned lithium ion battery negative electrode. By the method, the production process of the lithium ion battery negative electrode can be effectively simplified.

The invetnio disclosese heat conductive glue, which consists of base and heat conductive powder in the base, wherein the base is polyol, which possesses strong wetting ability; the thickness among heat conductive powders and between heat conductive powder and heat conductive glue surface becomes thinner, which improves heat conductive property of heat conductive glue.

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 three-dimensional nano porous copper / one-dimensional cuprous oxide nanowire network type lithium ion battery cathode. The lithium ion battery cathode is composed of a three-dimensional nano porous copper substrate and a cuprous oxide nanowire layer; the substrate is taken as a current collector, and the cuprous oxide nanowire layer is taken as an active lithium storage layer; the cuprous oxide nanowire layer is located on the surface of the substrate and combined with the substrate as a whole; the cuprous oxide nanowire layer is formed by cuprous oxide nanowires which are in-situ grown on the substrate and are mutually interweaved and stacked, and the cuprous oxide nanowire layer is of a network structure; and the lithium ion battery cathode can improve the cycle performance and specific capacity of a lithium ion battery. The invention further provides a one-step preparation method of the lithium ion battery cathode, and the method can effectively simplify the production technology of the lithium ion battery cathode.

The invention provides a preparation method for a three-dimensional nitrogen-doped 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 to obtain three-dimensional nitrogen-doped graphene; (3), adding the three-dimensional nitrogen-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 ammonium hydroxide to the graphene oxide suspension liquid, and adding elemental 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), uniformly stirring, and slowly adding distilled water while stirring to obtain the three-dimensional structured positive electrode material of the lithium-sulfur battery. Due to sulfur adsorption by nitrogen atoms in the nitrogen-doped graphene, the shuttle flying effect can be effectively lowered, so that the cycling life of the lithium-sulfur battery is prolonged.

The invention provides a cold-end flexible cold chain structure of a coaxial pulse tube refrigerator and a manufacturing method. The structure comprises a cold head, a cold head cap, a spring and a cooled device. An upper-end plane of the cold head cap is jointed with the cooled device, the cold head cap is mounted at the top of the cold head, the spring is mounted between the cold head and the cold head cap to enable the two to contact and to be capable of moving vertically, and a buffering space is formed between the cold head and the cold head cap. A small hole connected with the outside is arranged at the bottom of a countersink of the upper end of the cold head so as to extract remaining air in a closed region between the cold head and the cold head cap. Since the cold head cap supported by the spring is mounted between the cold head and the cooled device, the cold head is jointed with the cooled device closely, and influences of slight vibration on the cooled device when the refrigerator works are weakened. The small hole leading to the outside is added inside the cold head, so that condensate ice crystals are avoided, loss in a cold transfer process is reduced, and quite positive effects on application and popularization of coaxial pulse tube refrigerators are achieved.

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 an anode material of a lithium iron phosphate battery. The anode material comprises an anode active material composed of, by mass, 0.1% of titanium, 0.2% of magnesium and 0.1% of silver-modified lithium iron phosphate. A preparation method of the anode active material specifically includes 1) preparing first lithium iron phosphate; 2) dividing the first lithium iron phosphate into two equal parts so as obtain first preliminary lithium iron phosphate and second preliminary lithium iron phosphate; 3), preparing to obtain second lithium iron phosphate and uniformly mixing the first preliminary lithium iron phosphate, the second preliminary lithium iron phosphate and the second lithium iron phosphate so as to obtain the anode active material. The anode material of the lithium iron phosphate battery is higher in electric conductivity and tapping density, so that power generation voltage stability of the battery is improved and service life of the battery is prolonged.

The embodiment of the invention provides a full-tab lithium battery and a preparation method thereof. The full-tab lithium battery comprises a battery cell and a current collecting disc; an electrodeend is formed on the battery cell and comprises a positive electrode current collector and a negative electrode current collector; the current collecting disc is provided with a first disc surface used for being connected with the end surface of the electrode end, profiling grooves are formed in the end surface of the positive electrode current collector and / or the negative electrode current collector in an extrusion mode, and conductive structures matched with the profiling grooves are formed on the first disc surface; by designing the electrode end with the tab function, the first disc surface of the current collecting disc can be directly and tightly connected with the end surface of the electrode end, and the current collecting disc conducts and transmits the current of the positive electrode and the negative electrode of the battery cell, so that the structure of the battery is greatly simplified, and the complexity of a battery manufacturing process is reduced. And moreover, full-area direct contact between the current collecting disc and the electrode end can be realized, the conduction distance of current passing through the tab is shortened, the effect of effectively reducing the internal resistance of the lithium ion battery is achieved, and the use safety of the lithium ion battery is ensured.

The invention discloses a lithium-ion battery which is provided with a shell and an electrolyte and an electric core that are wrapped in the shell; the electric core consists of one or more monomer cores; the monomer core consists of two or more complexes; the complex is prepared by the superposed arrangement and pressing of a positive plate, a diaphragm paper and a negative plate; two sides of the diaphragm paper are provided with a bonding layer respectively; and the bonding layer uses polycarboxylic tetrafluoroethylene or polyvinylidene fluoride as preparation material. The lithium-ion battery has the advantages of being not easy to deform when in use.

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 relates to a cathode carbon block steel bar group applied to an aluminium electrolytic tank structure technology. The cathode carbon block steel bar group has a biggest difference from the universal steel bar group of the cathode block at present that: only one cathode steel bar is arranged in a steel bar groove of the cathode block; and the two sides of a steel bar are both provided with steel bar ramming pastes which are connected with the cathode block.Compared with the prior art, the novel steel bar group of the cathode block adopts a new technical scheme that: two cathode steel bars are arranged in the steel bar groove; the steel bar ramming pastes are arranged between two steel bars, and the outer side faces of the two cathode steel bars are connected with the cathode block through a high-resistant conductive adhesive. The novel steel bar group of the cathode block is used for constructing a cathode lining of an aluminium electrolysis cell and can greatly reduce contact voltage of iron and carbon so as to achieve the aim of reducing power consumption of structural resistance of the aluminium electrolysis cell.

The invention discloses a water-cooled motor stator which comprises a stator base, a stator iron core, an iron core pressing plate, a water cooling system and an end part protection system. The statorbase is a cage-shaped base, the stator iron core is composed of a tooth part and a yoke part, and the water cooling system is composed of a notch cooler and a yoke part cooler; the yoke cooler is composed of a yoke water pipe and an integrated bracket. The end protection system is composed of an integrated bracket, an end inner cover, an end outer cover and high-thermal-conductivity silicone grease. The stator base and the stator iron core are assembled into a whole, and the components form the water-cooled motor stator; the water-cooled motor stator provided by the invention is high in cooling efficiency, good in reliability and high in integration level, and the problems of protection and cooling of the end part of a high-power density motor are solved well.

Provided are a cathode substrate, a high capacity all-solid-state battery, and a method for manufacturing the same. The cathode substrate includes a base in a mesh form and a cathode formed on the base, wherein the cathode is configured to overlap the base. The present invention may resolve a conventional problem of deterioration in battery efficiency, which has been caused by a long distance between an electrode and a cathode, and may produce a high capacity all-solid-state battery while suppressing or preventing an increase in the thickness of the cathode.

The invention provides a button battery shell structure, a button battery and an electric device, related to the technical field of batteries. A lower cover comprises a second sidewall upper segment and a second sidewall lower segment; diameter of the second sidewall upper segment is greater than the diameter of the second sidewall lower segment; a sealing ring is mounted between an upper cover and the lower cover; altitude of the sealing ring is adaptive to the altitude of the second sidewall upper segment, the sealing ring is mounted in an inner cavity of the second sidewall upper segment; the upper cover is mounted in the inner cavity of the second sidewall upper segment, and a battery core is mounted in the inner cavity of the second sidewall lower segment. The second sidewall lower segment bears pressure of expansion of the battery core and cannot deform, moment of force of the second sidewall upper segment decreases, pressure provided increases, by combination of the two aspects,the battery is guaranteed to not deform even under a condition of expansion of the battery core and internal pressure, and cannot leak liquid. Consequently, technical problems above are solved. Meanwhile, since reduction of size of the upper cover and the sealing cover, effective volume of the inner cavity is increased, a bigger battery core is allowed to be installed, and battery capacity is improved effectively.

The invention relates to a starlike sleeve preheater for a large-scale channelization dissolution device. The starlike sleeve preheater comprises an outer sleeve and an inner sleeve. The starlike sleeve preheater is characterized in that: (1) the outer sleeve is provided with more than three inner sleeves in parallel along the axis direction; and (2) the outer sleeve is provided with inner sleeve brackets at intervals. The corresponding positions of the three inner sleeves are positioned in the three vertex positions of a regular triangle and fixed by the inner sleeve brackets. The invention also provides three different design proposals of the inner sleeve brackets. The starlike sleeve preheater is adopted and can not slow the flow speed of ore slurry, can also increase an area of a heat exchange surface and improve the uniformity of temperature in ore slurry flow under the condition of increasing the flow of the ore slurry. In a word, the invention greatly improves the efficiency of channel dissolution and has great popularization and application value.

The invention discloses a cell divided ice storage tank. The cell divided ice storage tank comprises a tank body and coil pipes arranged in the tank body. The coil pipes comprise a main liquid inlet pipe, a main liquid outlet pipe and connecting pipes connected between the main liquid inlet pipe and the main liquid outlet pipe. The connecting pipes comprise vertical coil pipes arranged on the mainliquid inlet pipe and the main liquid outlet pipe in a spaced manner and horizontal coil pipes which connect adjacent two vertical coil pipes in the horizontal direction. Heat diffusing plates are arranged on the vertical coil pipes, the heat diffusing plates are equivalent to the vertical coil pipes in height, and the heat diffusing plates are of cell divided structures which are paved towards the inside and the outside based on the vertical coil pipes in the horizontal direction. According to the cell divided ice storage tank, the structural compactness of the ice storage tank is improved,the transfer mode of heat can be improved effectively, heat is conducted in the optimal path from a point to a body, the heat conduction distance is shortened greatly, the heat loss is reduced and theheat exchange performance is intensified, so that purposes of efficient heat exchange and energy conservation are further achieved.

The invention relates to a radiofrequency ablation electrode device. The radiofrequency ablation electrode device comprises an electrode casing tube, a probe tube, a first electrode beam, a second electrode beam and an operating handle; the electrode casing tube is fixed to the operating handle, and the probe tube is arranged in an inner cavity of the electrode casing tube and can move along the inner cavity of the electrode casing tube relative to the electrode casing tube; the first electrode beam is fixed at the far end of the probe tube, and the second electrode beam is fixed at the near end of the probe tube; the first electrode beam and the second electrode beam are insulated; a first voltage is loaded to the first electrode beam, a second voltage is loaded to the second electrode beam, and the first electrode beam and the second electrode beam act on human body lesion tissue; a current loop is formed among the first electrode beam, the second electrode beam and the human body lesion tissue. Accordingly, the problems that in the working process of the radiofrequency ablation electrode device, a patient feels discomfort and continuously has fever in several weeks after the patient is subjected to a radiofrequency ablation operation due to the fact that high radiofrequency energy is consumed and the radiofrequency energy can be accumulated in human body normal tissue are solved.

The invention provides a preparation method for a fluorine-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 tetrabutylammonium fluoride to the graphene oxide suspension liquid, then transferring to a hydrothermal kettle to perform a hydrothermal reaction, after the reaction is completed, performing ethyl alcohol washing, water washing, freezing and drying to obtain three-dimensional fluorine-doped graphene; (3), adding the obtained three-dimensional fluorine-doped graphene and ketjen black into N-methyl pyrrolidone for performing an ultrasonic reaction to form a suspension liquid; (4), adding elemental 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 obtained two kinds of suspension liquid, uniformly stirring, slowly adding distilled water while stirring, and then performing centrifuging, water washing, and drying to obtain the three-dimensional structured positive electrode material of the lithium-sulfur battery. Due to the preparation method, the cycling life of the lithium-sulfur battery is prolonged.

The invention discloses a single battery, a manufacturing method thereof, a battery pack, a storage battery and equipment, relates to the technical field of new energy, and aims to improve the effective current-carrying capacity among the single batteries under the condition of lower heat productivity. The battery comprises a battery shell, a tab-free battery cell, a first electrode terminal, a second electrode terminal and a battery cap, wherein the tab-free battery cell is positioned in the battery shell; the battery shell is provided with an opposite closed structure and an open structure provided with a battery cap, the tab-free battery cell is provided with a first electrode end face and a second electrode end face which are opposite, the first electrode terminal is welded with the first electrode end face, the second electrode terminal is welded with the second electrode end face, and the battery cap is welded with the second electrode terminal; the closed structure comprises a first protruding part and a first welding part, the first welding part is welded to the first electrode terminal, and the first protruding part protrudes in the direction away from the opening structure. The manufacturing method is used for manufacturing the single battery. The single battery provided by the invention is used in the storage battery.

The invention relates to a preparation method for a lithium manganese / iron phosphate composite material. The preparation method for the lithium manganese / iron phosphate composite material is characterized by comprising the following steps of dissolving a phosphorus-containing compound and a manganese-containing compound into water to form a mixed solution; adding a precipitator into the mixed solution, stirring and fully precipitating to obtain a MnHPO<4> hydrate, wherein the precipitator is selected from at least one kind of propyl alcohol, isopropanol and butanol; performing ball milling on a carbon-containing compound, at least one kind of compounds containing doping elements, and the MnHPO<4> hydrate, a lithium-containing compound, a ferrous-containing compound and a dispersing agent jointly, and drying to obtain a mixture; and calcining the mixture in an atmosphere of a protective gas at a temperature of 550-800 DEG C for 8-16h to obtain the lithium manganese / iron phosphate composite material. The preparation method for the lithium manganese / iron phosphate composite material is simple in process; and the prepared lithium manganese / iron phosphate composite material is relatively good in the electrical performance.

The invention provides an atomizer. The atomizer comprises a liquid storage part and a heating assembly. A liquid storage cavity for storing cigarette liquid is formed in the liquid storage part; theheating assembly comprises a liquid absorption piece, the liquid suction part comprises an atomization surface and a liquid suction surface; a liquid guide groove is formed in the liquid suction piece; a connecting piece is arranged in the liquid guide groove; wherein the liquid guide groove is communicated with the liquid storage cavity, the liquid suction surface is the inner surface of the liquid guide groove wall body, the atomization surface is at least part of the outer surface of the liquid guide groove wall body, the atomization surface is located outside the liquid storage cavity, andthe liquid suction piece can conduct cigarette liquid in the liquid guide groove to the atomization surface. According to the atomizer, the liquid guide efficiency of the liquid suction piece is improved, and meanwhile the structural strength of the liquid suction piece is improved. In addition, the invention further provides an electronic cigarette adopting the atomizer.

The invention relates to a thin type double-layer solid wood heated floor, and belongs to the technical field of floors or floor layers which are composed of a plurality of similar components. The thin type double-layer solid wood heated floor comprises a solid wood base plate, grooves and tenons are formed around the solid wood base plate, and a solid wood face plate is arranged on the upper portion of the solid wood base plate. A layer of finish paint is arranged on the solid wood face plate, and a dampproof paint layer is arranged on the lower portion of the solid wood face plate. The base plate is composed of 5-7 layers of single plates. Compared with an existing solid wood floor for heating, the thin type double-layer solid wood heated floor omits a complex structure, and the whole thickness of the solid wood floor is greatly reduced, so that the floor conduction distance is shortened, additionally, the heated floor is made of doubly-layer solid wood, the inner water content is high, water absorption and deformation are not liable to occur, and surface cracking does not occur.

The invention relates to a bolt type aluminium electrolytic capacitor with high reliability and high temperature resistance. The capacitor comprises a capacitor element which is formed by folding and coiling a positive electrode foil on which a positive foil guide strip is fixed, a negative electrode foil on which a negative foil guide strip is fixed and first electrolytic paper. The capacitor is characterized in that the upper edge of the negative electrode foil extends upward to expose outside the upper surface of the capacitor element, an insulated structure is sleeved outside the positive foil guide strip, a heat radiation pin is arranged between the capacitor element and a cover plate, and both the negative foil guide strip and the positive foil guide strip pass through the heat radiation pin and then are connected with the corresponding cover plate terminals. The heat radiation performance of the bolt type aluminium electrolytic capacitor provided by the invention is greatly raised. In the actual use of the whole assembled machine, the surface temperature rise is less than 2 DEG C, a product with a service life of 3000 hours at 85 DEG C is raised to a service life of 6000 hours at 85 DEG C, a product with a service life of 3000 hours at 105 DEG C is raised to a service life of 6000 hours at 105 DEG C, and the product reliability is greatly improved.

The invention provides an ultra-thin proton exchange membrane for a fuel cell and a preparation method thereof. The preparation method comprises the steps that 4,4-dichlorodiphenyl sulfone, 4,4-biphenol and fuming sulfuric acid are used as raw materials, and are dissolved in an N-methyl-2-pyrrolidinone solvent, anhydrous potassium carbonate is added, the temperature is risen slowly, meanwhile, toluene and vinylidene fluoride monomers are added slowly, an initiator is added after reflux temperature rise reaction, meanwhile, stirring is carried out for continuous reaction for 12h, a viscous solution is obtained, deionized water is poured into the viscous solution when the viscous solution is cooled to the room temperature, and the ultra-thin proton exchange membrane is obtained after washing, drying and tape casting. According to the ultra-thin proton exchange membrane for the fuel cell and the preparation method thereof, by adding a thin bonding layer to a sulfonated polyarylether ketone membrane, the interface adhesion between the membrane and electrodes is improved, in addition, by reducing the thickness of the membrane, the distance of proton conduction in the membrane is reduced, the proton conductivity is improved, and the defect of insufficient stability and proton conductivity of the sulfonated modified polyarylether sulfone proton exchange membrane is overcome.

The invention relates to a thin double-layer solid wood geothermal floor containing air passages, and belongs to the technical field of a ground or floor layer that comprises a plurality of analogous components. The thin double-layer solid wood geothermal floor includes a solid wood baseplate, and grooves as well as tenons are arranged around the solid wood baseplate that is provided with a solid wood panel, wherein a coating of finish paint is arranged on the solid wood panel, and a moistureproof oil paint layer is arranged under the solid wood panel. The baseplate is composed of 5-7 layers of single plates. Compared with the prior art of floor heating, the geothermal floor is simple in structure, so that the overall thickness of the wood floor is greatly reduced and the conduction distance of the floor is reduced. Meanwhile, the geothermal floor is manufactured by the adoption of double-layer solid wood, and the internal moisture content is comparatively high, so that it is uneasy for the geothermal floor to absorb water and deform, or crack on the surface.