32results about How to "With piezoelectric effect" patented technology

The invention discloses a lithium-sulfur battery composite positive electrode material. Graphene oxide is used as a matrix of the battery positive electrode material, a graphene / ferroelectric composite material is obtained after the graphene oxide and a ferroelectric material are compounded, and then the graphene / ferroelectric composite material is mixed with nano sulfur according to a mass ratio of 3:7 to prepare the lithium-sulfur battery composite positive electrode material; and the ferroelectric material is one of barium titanate, lead titanate, potassium niobate, strontium titanate, lithium niobate or lead zirconate titanate. According to the lithium-sulfur battery composite positive electrode material disclosed by the invention, excellent electrical conductivity and structural stability of the graphene oxide are utilized, and the graphene oxide is used as an excellent conductive network and the positive electrode matrix, so that electrical conductivity of the positive electrode material is improved; and by utilizing strong adsorption of ferroelectricity of the ferroelectric material on polar polysulfide, dissolution and shuttling of the polysulfide in electrolyte are inhibited, so that loss of active substances is reduced, coulombic efficiency of a lithium-sulfur battery is improved and a cycle life of the lithium-sulfur battery is prolonged.

The embodiment of the invention discloses a preparation method of a PbTiO3 intelligent coating, which comprises the following steps: forming a prime coating layer on a substrate surface, forming a PbTiO3 sensing layer on the prime coating layer surface, and performing polarization treatment of the PbTiO3 sensing layer to provide the PbTiO3 sensing layer with piezoelectric effect. The obtained PbTiO3 intelligent coating has the function of a piezoelectric sensor, and can realize real-time monitoring and feedback of the abrasion states of the substrate surface and the PbTiO3 intelligent coating itself, and thus no sensor is necessary to be pasted. In addition, the prime coating layer is disposed between the PbTiO3 sensing layer and the substrate, which provides very strong bonding degree between the PbTiO3 sensing layer and the substrate. Compared with current sensors and substrates which are bonded through pasting, the preparation method of the PbTiO3 intelligent coating provided by the invention can avoid the problem of poor bonding degree between sensors and substrates.

The invention provides an A60-level lightweight refractory deck composition, comprising at least one component A and component B, wherein the mass ratio of the component A to the component B is (1 to 6) to (1 to 8); the component A is neoprene latex; the component B is prepared from ordinary silicon 42.5 cement, large ceramsite, small ceramsite, large vermiculite and small vermiculite; the grain size of the large ceramsite is 2-5mm; the grain size of the small ceramsite is 0.5-2mm; the grain size of the large vermiculite is 2-4mm; the grain size of the small vermiculite is 0.2-2mm; and the component B contains the ingredients by weight ratio of 50-55% of ordinary silicon 42.5 cement, 20-25% of large ceramsite, 5-10% of small ceramsite, 14-20% of large vermiculite and 5-10% of small vermiculite. The A60-level lightweight refractory deck composition has good lightness, compressive property, fracture resistance and shock resistance, and can effectively prevent sound transmission and heat conduction; and the fire resistance can achieve A-60 level.

Belonging to the technical field of inorganic material preparation methods, the invention discloses a preparation method of a quartz tube, quartz plate or quartz rod. The preparation method of the quartz tube, quartz plate or quartz rod disclosed in the invention specifically includes the steps of: quartz raw ore crushing, electromagnetic roasting, water cooling, grinding, magnetic separation, static and flotation for impurity removal, microwave complexation for impurity removal, deionized water cleaning, drying, and smelting furnace treatment, thus obtaining the quartz tube, quartz plate or quartz rod. The technological process involved in the invention has reasonable structure, advanced, efficient and easily controllable impurity removal technology, and also has pertinence, high quality index and good stability. Finally, the obtained quartz tube, quartz plate or quartz rod has an SiO2 content up to 99.990-99.99990% and an impurity content of less than 10ppm.

The invention discloses an absorbable orthopedic instrument material capable of prompting growth of bone tissues and a preparation method thereof. The material is prepared by compounding a medical absorbable high-molecular polymer, a degradable pure magnesium or magnesium alloy which is loaded with BaTiO3 piezoelectric ceramics, can conduct piezoelectric signals and serves as a conductive carrier material, and grapheme for improving the electric polarization effect. When the absorbable orthopedic instrument material is in use, an electric signal produced by the piezoelectric ceramics under the action of an external load can be effectively conducted to organism tissues around an orthopedic instrument by the conductive carrier material to stimulate the growth of early hard tissues at a bone injury position and promote healing of the bone tissues. The BaTiO3 piezoelectric ceramics is loaded on the conductive carrier material through a dual loading technology consisting of electrophoresis-micro-arc oxidation and sol sealing, coating and film forming. Meanwhile, the conductive carrier material and the grapheme can also enhance the polarization effect and stress sensitivity of the piezoelectric ceramics. A bar material or a plate material is prepared firstly by means of a thermal die pressing, extruding or pulling method, and the orthopedic instrument is made by means of polarization and machining.

The embodiment of the invention discloses a preparation method of a PbZr0.52Ti0.48O3 intelligent coating. The preparation method comprises the following steps: forming an insulating layer on the surface of a substrate; forming a PbZr0.52Ti0.48O3 sensing layer on the surface of the insulating layer; carrying out polarization treatment on the PbZr0.52Ti0.48O3 sensing layer, so as to lead the PbZr0.52Ti0.48O3 sensing layer has piezoelectric effect. The acquired PbZr0.52Ti0.48O3 sensing layer has the function of a piezoelectric sensor, and is capable of monitoring and feeding back the abrasion status of the substrate surface in real time, so that the sensor needs not to be adhered, thereby the problem that the degree of adhesion between the sensor and the substrate is poor is avoided; and moreover, the insulating layer is provided between the PbZr0.52Ti0.48O3 sensing layer and the substrate, and a piezoelectric signal generated by the PbZr0.52Ti0.48O3 sensing layer to the substrate surface abrasion is very weak, thus the the piezoelectric signal generated by the PbZr0.52Ti0.48O3 sensing layer can be prevented from entering the substrate by insulating layer, thereby the piezoelectric signal loss by the substrate is avoided, the acquiring capability for the piezoelectric signal is enhanced, and the sensitivity for real-time monitoring and feeding back the abrasion status of the substrate surface is improved.

The application discloses a treatment method of Cu-EDTA heavy metal complex wastewater. The treatment method comprises the following steps: firstly, synthesizing a piezoelectric composite of barium titanate / graphene by a hydrothermal method; under pressure provided by ultrasonication, breaking down heavy metal complexation and degrading organic matter obtained after breakdown by virtue of the piezoelectric chemical effect of piezoelectric material; and further adsorbing and recovering free Cu<2+> or weak complex Cu<2+> by graphene in a solution obtained by breakdown and degradation, so as to effectively remove Cu-EDTA heavy metal complex wastewater. According to the application, by coupling the piezoelectric effect and the chemical process as well as the adsorption and electric desorptioneffects, the situation of high cost, cumbersome process, serious secondary pollution and secondary recovery of a traditional heavy metal wastewater treatment method is broken through, the effective removal of EDTA and the efficient recovery of Cu<2+> are implemented, the shortcomings of traditional technology are overcome, and as a green and efficient processing technology, the treatment method provides a new development direction for novel water treatment technology.

The invention discloses a method and a device for deeply treating wastewater by coupling a PVDF / ZnO piezoelectric ultrafiltration membrane to an advanced oxidation technology. Wastewater to be treatedand ozone pass through the PVDF / ZnO piezoelectric ultrafiltration membrane, the PVDF / ZnO piezoelectric ultrafiltration membrane is connected with an alternating current power supply to provide a transmembrane pressure in a vacuumizing form, and ultraviolet lamps which are arranged on the two sides of the PVDF / ZnO piezoelectric ultrafiltration membrane are turned on at the same time; the wastewater is subjected to the filter effect of the PVDF / ZnO piezoelectric ultrafiltration membrane, ozonation, ultraviolet radiation and the photocatalytic oxidation effect to be purified finally, and the PVDF / ZnO piezoelectric ultrafiltration membrane realizes a self-cleaning effect under the action of the alternating current power supply; the method solves the problems that the membrane filter technology cannot effectively remove small molecule pollutants, and an advanced oxidation technology cannot effectively oxidize large molecule pollutants, the two technologies are organically coupled to each other and are complementary in advantages, and the piezoelectric effect of the PVDF / ZnO piezoelectric ultrafiltration membrane is utilized at the same time, so that membrane pollution is effectively inhibited.

The invention provides a piezoelectric catalytic porous ceramic material and a preparation method and application thereof. The material comprises a porous ceramic matrix and a catalytic unit which isattached to the surface and the interior of the matrix and has a piezoelectric effect, wherein the catalytic unit at least comprises titanate, and a titanate material comprises titanium ions and positive divalent cations in a molar mass ratio of 1: 1. The piezoelectric catalytic porous ceramic material provided by the invention has a piezoelectric effect, can efficiently degrade volatile organic compounds under the action of wind energy, mechanical energy or sound wave energy, does not need to additionally provide energy, and avoids emission of secondary greenhouse gas. The piezoelectric catalytic porous ceramic material is stable in performance, reusable and low in cost, and the preparation method is simple, feasible and environmentally-friendly. The piezoelectric catalytic porous ceramicmaterial is applied to an industrial dust remover, and can remove toxic and harmful gas while removing dust; and when applied to an air purifier and an air conditioner, the piezoelectric catalytic porous ceramic material overcomes the problem that a photocatalyst needs to be driven by a light source and the problem that activated carbon needs to be frequently replaced after adsorption is saturated.

The invention relates to the field of conductive materials, in particular to a transparent conductive film having a piezoelectric effect and a preparation method thereof. The transparent conductive film comprises a base film and a nano silver conductive layer and an OC protective layer which are sequentially coated on the surface of the base film, and the raw materials of the nano silver conductive layer include silver nanowires, an adhesive, a leveling agent, a surfactant, and an antioxidant and ultrapure water; the OC protective layer comprises acrylic resin, a photoinitiator, a leveling agent, SiO2 nanoparticles and an organic solvent. The silver nanowires are taken as raw materials for preparation of the conductive layer, the silver nanowires can reduce the conductive resistance valueof the conductive film and can improve the wear resistance and bending property. The conductive layer is coated with the OC protective layer to facilitate improvement of the transmittance of the conductive film, the SiO2 nanoparticles are added in the OC protective layer to allow the OC protective layer to have a piezoelectric effect. The conductive film is high in bending resistance, low in square resistance and long in service life while having the piezoelectric effect.

The invention relates to the technical field of home appliances, in particular to damping device and refrigeration equipment. The damping device comprises a shell, a coil assembly, a core body and aninstallation assembly, the shell is made of piezoelectric composite materials, the coil assembly is arranged in the shell and is electrically connected with the shell, the core body is made of giant magnetostrictive materials and arranged in the coil assembly, the installation assembly is arranged at the upper end of the shell and used for installing a compressor, and the bottom end of the shell is installed on a base plate. The damping device is not restrained by the vibration isolation rate, a good effect on the vibration within 1HZ-100HZ range can be achieved, and the damping device can achieve a good damping effect on the vibration of the vibration frequency with a wider range. The refrigeration equipment can have a good damping effect under the working condition of high-frequency vibration, and further has a good damping effect under the working condition of low-frequency vibration.

The invention discloses an absorbable orthopedic instrument material capable of prompting growth of bone tissues and a preparation method thereof. The material is prepared by compounding a medical absorbable high-molecular polymer, a degradable pure magnesium or magnesium alloy which is loaded with BaTiO3 piezoelectric ceramics, can conduct piezoelectric signals and serves as a conductive carrier material, and grapheme for improving the electric polarization effect. When the absorbable orthopedic instrument material is in use, an electric signal produced by the piezoelectric ceramics under the action of an external load can be effectively conducted to organism tissues around an orthopedic instrument by the conductive carrier material to stimulate the growth of early hard tissues at a bone injury position and promote healing of the bone tissues. The BaTiO3 piezoelectric ceramics is loaded on the conductive carrier material through a dual loading technology consisting of electrophoresis-micro-arc oxidation and sol sealing, coating and film forming. Meanwhile, the conductive carrier material and the grapheme can also enhance the polarization effect and stress sensitivity of the piezoelectric ceramics. A bar material or a plate material is prepared firstly by means of a thermal die pressing, extruding or pulling method, and the orthopedic instrument is made by means of polarization and machining.

The invention provides a ferrite doped piezoelectric catalytic porous ceramic material, which comprises a porous ceramic matrix and catalytic units attached to the surface and the interior of the matrix and having piezoelectric effect, wherein the catalytic unit at least comprises ferrite, the ferrite material comprises iron ions, positive monovalent cations and positive divalent cations, and a molar mass ratio of the iron ions to the positive monovalent cations to the positive divalent cations is 1:1:1. According to the invention, the ferrite doped piezoelectric catalytic porous ceramic material has a piezoelectric effect, and can efficiently degrade volatile organic compounds under the action of wind energy, mechanical energy or sound wave energy; when the ferrite doped piezoelectric catalytic porous ceramic material is used for an industrial pulse dust collector, dust removal and dust and toxic and harmful gas removal can be simultaneously achieved; the ferrite doped piezoelectric catalytic porous ceramic material is used in an air purifier and an air conditioner, the emission of secondary greenhouse gas is avoided, and the problem that active carbon needs to be frequently replaced after reaching adsorption saturation is overcome; and the material is stable in performance, reusable and low in cost, and the preparation method is simple, easy to implement and environmentally friendly.

The invention discloses a waste gas exhaust device for a high-rise building water heater, which comprises a water heater body and a smoke exhaust pipe. The water heater body is respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively sealed and connected with an air inlet pipe. and the outlet pipe, the exhaust pipe is sealed and slidably connected with a push plate, the end of the outlet pipe away from the water heater body is sealed and connected with the push plate, the push plate is rotatably connected with an impeller, and the connection between the smoke exhaust pipe and the push plate A chute is opened at the place, and the chute is connected with an annular piezoelectric ring, and the two sides of the push plate are respectively provided with a fixed plate and a rotating plate. The advantage is that in the state of high external wind pressure, the push plate is pushed by the air pressure to make it contact with the piezoelectric ring and conduct the circuit, so that the piezoelectric ring charges the flat plate capacitor composed of the push plate and the fixed plate under the action of pressure And finally breakdown, under the action of instantaneous breakdown heat, push the push plate back, so as to discharge the waste and avoid causing safety problems.

The invention provides a ferrate piezoelectric catalytic porous ceramic material, a preparation method and an application thereof, the ceramic material comprises a porous ceramic matrix and catalyticunits with piezoelectric effect attached to the surface and the interior of the matrix, the catalytic units at least comprise ferrate, and the ferrate material comprises iron ions and positive trivalent cations. The ferrite piezoelectric catalytic porous ceramic material provided by the invention has the piezoelectric effect, and can efficiently degrade volatile organic compounds under the actionof wind energy, mechanical energy or sound wave energy. When used for an industrial pulse dust collector, the product can simultaneously remove dust and toxic and harmful gases. The activated carbon adsorbent is applied to an air purifier and an air conditioner, energy does not need to be additionally provided, secondary greenhouse gas emission is avoided, and the problem that activated carbon needs to be frequently replaced after adsorption saturation is achieved is solved. The material is stable in performance, reusable and low in cost, and the preparation method is simple, easy to implement, green and environmentally friendly.

The invention relates to a composite hemostatic repair material and a preparation method thereof. The hemostatic repair material uses shells and tourmaline as main raw materials, transforms shells and phosphorus sources into hydroxyapatite, and uses chitosan sponge as a matrix for loading . The preparation method uses shells and tourmaline as main raw materials, and uses ammonium hydrogen phosphate as a phosphorus source for hydrothermal reaction. The self-electric field on the surface of tourmaline has an attraction effect on charged ions in the system. The shell / tourmaline composite material is obtained by in-situ growth on the surface of the stone, and then the shell / tourmaline composite material is embedded in the chitosan sponge matrix through a freeze-drying process to prepare the shell / tourmaline composite hemostatic repair material. The hemostatic repair material can significantly shorten the coagulation time and achieve a good hemostatic effect.

The invention discloses a device comprising a packing box, electronic equipment and an electronic device. Holes are arranged on the packing box comprising a cavity structure so that sound generated by the electronic equipment can be transmitted to space outside the packing box when the electronic equipment is arranged in the packing box. Therefore, the technical scheme has the effects that the electronic equipment can be protected from being worn or damaged by external force by the packing box of the electronic equipment and also has the technical effects that sound transmission efficiency of the electronic equipment in sound playing can also be enhanced.

The invention discloses a method and device for advanced wastewater treatment with PVDF / ZnO piezoelectric ultrafiltration membrane coupled with advanced oxidation technology. Connect with AC power supply to provide transmembrane pressure in the form of vacuum, and at the same time turn on the ultraviolet lamps set on both sides of PVDF / ZnO piezoelectric ultrafiltration membrane; the wastewater is filtered through PVDF / ZnO piezoelectric ultrafiltration membrane, and ozone Oxidation, ultraviolet radiation, and photocatalytic oxidation are finally purified, and the PVDF / ZnO piezoelectric ultrafiltration membrane realizes self-cleaning effect under the action of AC power; this method overcomes that membrane filtration technology cannot effectively remove small molecule pollutants and advanced oxidation technology For the problem of ineffective oxidation of macromolecular pollutants, the two technologies are organically coupled and complement each other's advantages. At the same time, the piezoelectric effect of PVDF / ZnO piezoelectric ultrafiltration membrane is also used to effectively inhibit membrane fouling.

The invention provides an A60-level lightweight refractory deck composition, comprising at least one component A and component B, wherein the mass ratio of the component A to the component B is (1 to 6) to (1 to 8); the component A is neoprene latex; the component B is prepared from ordinary silicon 42.5 cement, large ceramsite, small ceramsite, large vermiculite and small vermiculite; the grain size of the large ceramsite is 2-5mm; the grain size of the small ceramsite is 0.5-2mm; the grain size of the large vermiculite is 2-4mm; the grain size of the small vermiculite is 0.2-2mm; and the component B contains the ingredients by weight ratio of 50-55% of ordinary silicon 42.5 cement, 20-25% of large ceramsite, 5-10% of small ceramsite, 14-20% of large vermiculite and 5-10% of small vermiculite. The A60-level lightweight refractory deck composition has good lightness, compressive property, fracture resistance and shock resistance, and can effectively prevent sound transmission and heat conduction; and the fire resistance can achieve A-60 level.

The invention discloses a luminescent coating which is mainly prepared from an adhesive, piezoelectric ceramic particles, electroluminescent powder and fluorescent powder. The piezoelectric ceramic particles have the piezoelectric effect and can generate voltage when the piezoelectric ceramic particles are subjected to vibration stimulation, after the piezoelectric ceramic particles and the electroluminescent powder are fully mixed, a conducting loop can be formed between the piezoelectric ceramic particles and the electroluminescent powder at a certain probability, at the moment, the voltage generated by the piezoelectric ceramic particles can excite the electroluminescent powder to emit light, the emitted light of the electroluminescent powder is absorbed and stored by the fluorescent powder, and therefore the luminescent coating can achieve continuous light emitting. The luminescent coating can achieve continuous self light emitting under a sound or vibration and is suitable for being applied to the places such as non-energized tunnels, caves and passageways.

The invention relates to a composite hemostatic repair material and a preparation method thereof. The hemostatic repair material is characterized in that a shell and tourmaline are adopted as main raw materials, the shell and a phosphorus source can be converted into hydroxyapatite, and chitosan sponge is used as a matrix for loading. According to the preparation method, the shell and the tourmaline are used as the main raw materials, ammonium hydrogen phosphate is used as the phosphorus source for a hydrothermal reaction, a self-generating electric field on the surface of the tourmaline has an attraction effect on charged ions in a system, the hydroxyapatite obtained through hydrothermal conversion of the shell grows on the surface of the tourmaline in situ to obtain a shell / tourmaline composite material, and then the shell / tourmaline composite material is embedded into a chitosan sponge matrix through a freeze drying process to prepare the shell / tourmaline composite hemostatic repair material. The hemostasis repair material can remarkably shorten the blood coagulation time, and achieves a good hemostasis effect.

The invention discloses a dehumidification waterproof floor tile, which comprises a brick body, a plurality of flexible pedals are embedded on the upper surface of the brick body, the plurality of flexible pedals are arranged in a circular array, and piezoelectric ceramic plates are bonded and connected at the bottom. A liquid storage chamber is opened in the brick body and the bottom of the piezoelectric ceramic plate runs through the liquid storage chamber, and the top of the liquid storage chamber is provided with two liquid inlet holes, and the two liquid inlet holes are located on two symmetrical sides of the brick body. On the side, the bottom of the liquid storage chamber is provided with a liquid outlet and a pressure valve is sealingly connected to the liquid outlet, and the piezoelectric ceramic plate is electrically connected to a plurality of fixing plates, and each of the fixing plates is penetrated with a Each of the torsion shafts is fixedly connected with a blade, and the blades are opposed to a rubber ball, and the rubber ball is rotatably connected to the top of the liquid storage chamber through a connecting rod and a torsion spring. The advantage is that by accelerating the air velocity on the surface of the liquid, the evaporation rate of water is accelerated, and the effect of dehumidification and waterproof is achieved.

The invention provides a composite material suitable for the preparation of a fuel economizer. The composite material is characterized in that the composite material comprises the following components, by weight, 30-60 parts of a polymer material, 40-80 parts of tourmalinite, 10-40 parts of rare earth, 0.01-15 parts of nanometer titanium dioxide and 0.001-10 parts of nanometer platinum, wherein the polymer material is PC, PE, ABS, PS or PMMA. A spherical porous fuel economizer prepared by mixing the components and carrying out slurry injection molding through an injection molding method is also provided. The fuel economizer has the advantages of low cost, good fuel economizing effect, engine power improvement, no generation of secondary pollution, reduction of the engine sound, reduction of carbon deposition in an oil way, stable effect during use, and realization of recycling.

The invention discloses a piezoelectric semiconductor thin film polarization experimental device. The piezoelectric semiconductor thin film polarization experimental device comprises a cabinet body, the top part of which is provided with a left guiding column and a right guiding column along a vertical direction. The top part of the cabinet body between the left guiding column and the right guiding column is fixedly provided with a heating plate and a first motor. The rotating shaft of the first motor is vertically upwardly provided with external screws, and a quartz glass tube is disposed on the heating plate. A carrying plate is disposed on the quartz glass tube, and the rotating shaft of the first motor passes through the carrying plate, and is in a threaded connection with the carrying plate. The left end and the right end of the carrying plate are slidably connected with the left guiding column and the right guiding column. The bottom part of the carrying plate is fixedly provided with a polarization clamp. The safe and easy-to-operate piezoelectric semiconductor thin film polarization experimental device capable of realizing temperature variation is realized.

The invention discloses a dehumidification type waterproof floor tile, and the floor tile comprises a tile body; a plurality of flexible pedals are embedded in the upper surface of the tile body, theflexible pedals are arranged in an annular array mode, the bottoms of the flexible pedals are jointly connected with a piezoelectric ceramic plate in an attached mode, a liquid storage cavity is formed in the tile body, and the bottom of the piezoelectric ceramic plate penetrates through the liquid storage cavity; two liquid inlet holes are formed in the top of the liquid storage cavity in a penetrating mode, the two liquid inlet holes are located in the two symmetrical sides of the brick body, a liquid outlet is formed in the bottom of the liquid storage cavity, a pressure valve is connectedto the liquid outlet in a sealed mode, the piezoelectric ceramic plate is electrically connected with a plurality of fixed plates, and a torsion shaft is arranged in each fixed plate in a penetratingmode; each torsion shaft is fixedly connected with a blade, the blades abut against a rubber ball, and the rubber ball is rotationally connected with the top of the liquid storage cavity through a connecting rod and a torsion spring. The floor tile has the advantages that the evaporation speed of water is increased by increasing the air flow rate on the surface of liquid, and the dehumidificationand waterproof effects are achieved.

The invention discloses a lithium-sulfur battery composite positive electrode material. Graphene oxide is used as a matrix of the battery positive electrode material, a graphene / ferroelectric composite material is obtained after the graphene oxide and a ferroelectric material are compounded, and then the graphene / ferroelectric composite material is mixed with nano sulfur according to a mass ratio of 3:7 to prepare the lithium-sulfur battery composite positive electrode material; and the ferroelectric material is one of barium titanate, lead titanate, potassium niobate, strontium titanate, lithium niobate or lead zirconate titanate. According to the lithium-sulfur battery composite positive electrode material disclosed by the invention, excellent electrical conductivity and structural stability of the graphene oxide are utilized, and the graphene oxide is used as an excellent conductive network and the positive electrode matrix, so that electrical conductivity of the positive electrode material is improved; and by utilizing strong adsorption of ferroelectricity of the ferroelectric material on polar polysulfide, dissolution and shuttling of the polysulfide in electrolyte are inhibited, so that loss of active substances is reduced, coulombic efficiency of a lithium-sulfur battery is improved and a cycle life of the lithium-sulfur battery is prolonged.

The invention discloses a self-service intelligent breakfast machine which comprises a cabinet body, a controller, a display screen, an identification module, a power supply module, a temperature control system and a disinfection system, the cabinet body is provided with a plurality of breakfast storage cavities, box doors are correspondingly installed in the breakfast storage cavities, the box doors are connected with the breakfast storage cavities in a matched mode through electronic locks, and the electronic locks are connected with the controller. The display screen and the identificationmodule are both installed on the cabinet body, the display screen and the identification module are both connected with the controller, the temperature control system is installed in the cabinet body,the temperature control system is used for controlling the temperature in the cabinet body, and the temperature control system is connected with the controller; each breakfast storage cavity is divided into an inner storage cavity body and an outer storage cavity body for breakfast storage and taking, safety and sanitation of breakfast are guaranteed, the storage cavity is disinfected multiple times through the disinfection system, the inner storage cavity body is sealed through a baffle arranged on a sliding block, and therefore food can be stored more cleanly.

The invention discloses a waste gas exhaust device of a water heater of a high-rise building. The waste gas exhaust device involves a water heater body and a smoke exhaust pipe, wherein an air inlet and an air outlet are formed in the water heater body, the air inlet and the air outlet are connected with an air inlet pipe and an air outlet pipe respectively in a sealed mode, the smoke exhaust pipeis connected with a push plate in a sealed and sliding mode, the end, away from the water heater body, of the air outlet pipe is connected with the push plate in a sealed mode, the push plate is rotationally connected with an impeller, a sliding groove is formed in the joint between the smoke exhaust pipe and the push plate, the sliding groove is connected with an annular piezoelectric ring, anda fixed plate and a rotating plate are arranged on the two sides of the push plate correspondingly. The device has the advantages that the push plate is pushed through air pressure to make contact with the piezoelectric ring and conduct a circuit under the state that the external air pressure is large, the piezoelectric ring charges a plate capacitor composed of the push plate and the fixed plateunder the action of the pressure and finally breaks the plate capacitor down, the push plate is reversely pushed under the action of instant breakdown heat, so that waste gas is discharged, and safetyissues are avoided.