47results about How to "Improve electrical output performance" patented technology

The present invention provides a sheet for sealing a rear surface of a solar cell in which degradation due to hydrolysis of the material constituting the solar cell is prevented, and the weather resistance is excellent such that electric output properties of the solar cell can be maintained not only under conditions of actual usage of the solar cell module but also conditions for evaluation under high temperatures and high moistures, and provides a sheet for sealing a rear surface of a solar cell comprising a laminate in which at least two substrates are laminated by an polyurethane-based adhesive, wherein the polyurethane-based adhesive comprises an adhesive having hydrolysis resistance which satisfies the following conditions: condition 1: the lamination strength of the adhesive is 1 N/15 mm or more after keeping the laminate in a chamber which acts as a highly accelerated stress test system under pressurized steam conditions of 105° C. and 1.05 atm for 168 hours; and condition 2: the adhesive does not bring on a delamination and a blister between the substrates after keeping the laminate in a chamber which acts as a highly accelerated stress test system under pressurized steam conditions of 105° C. and 1.05 atm for 168 hours.

The invention belongs to the technical field of flexible devices, and discloses a flexible wearable friction nanometer power generator with comprehensive multi-mode mechanical energy collecting functions. The flexible wearable friction nanometer power generator comprises a first friction component and a second friction component. Each friction component comprises an insulating isolation layer, a conductive element and a friction layer. A first friction surface and a second friction surface are in contact-separation cycle under the effect of normal external force when the flexible wearable friction nanometer power generator is in contact and separation modes under the effect of external force, the normal relative distances between friction units on the two friction surfaces change, and electric signals can be outputted to outer circuits by the first conductive element and the second conductive element; the first friction surface and the second friction surface relatively slide under theeffect of tangential external force when the flexible wearable friction nanometer power generator is in independent friction modes, the tangential relative locations of the first friction units and the second conductive element change, and electric signals can be outputted to the outer circuits by two secondary second conductive elements of the second conductive element. The flexible wearable friction nanometer power generator has the advantages that the multi-dimensional mechanical energy collecting performance of the flexible wearable friction nanometer power generator can be enhanced, andthe electric output performance of the flexible wearable friction nanometer power generator can be improved.

The invention relates to a friction nanometer power generator for converting mechanical energy to electric energy and a fabrication method of the friction nanometer power generator. The fabrication method comprises the steps of packaging a flexible substrate layer I, an electrode material layer I, an electrical negative friction layer, an electrical positive friction layer, an electrode material layer II and a flexible substrate layer II according to a sequence, and then connecting the two flexible substrate layer at the outmost layer so that the electrical negative friction layer and the electrical positive friction layer are arranged at intervals to fabricate the friction nanometer power generator, wherein the electrical negative friction layer is fabricated by automatically assembly a friction electrical negative substance on a surface of aerogel. The fabricated friction nanometer power generator for converting the mechanical energy to the electric energy comprises the electrical negative friction layer and the electrical positive friction layer, and the electrical negative frication layer mainly comprises nanometer fiber of the self-assembled friction electrical negative substance. The fabrication method is simple, the fabricated product is low in cost, the sensitivity on mechanical energy of tiny biology is high, the electrical output performance is excellent, and the frication nanometer power generator has favorable application prospect in the field of self power supply sensing and wearability.

The invention discloses a frictional nano-generator for collecting vibration energy, and the nano-generator comprises a plurality of power generation units, a vibration power generation membrane, and a supporting part, wherein the supporting part is provided with a cavity. The vibration power generation membrane is disposed at the opening of the cavity, and comprises an electrode layer. The electrode layer is electrically connected with a conductive object or an isoelectric level. The plurality of power generation units are disposed in the cavity. The vibration power generation membrane vibrates under the vibration effect, and the power generation units collide with the vibration power generation membrane, and form induction in the electrode layer to generate charges. The nanp-generator of the above structure can collect the vibration energy at high and low frequency, presents excellent output electric performances, and can continuously drive various types of wearable electronic equipment without a big-size energy management circuit.

The invention discloses a high-performance thermoelectric device and an ultrafast fabrication method thereof. In the high-performance thermoelectric device, a segmented structure is employed to perform optimal matching of a thermoelectric material and a temperature difference environment, a blocking layer and a buffer stress layer are employed to reduce interface element migration and longitudinalcontact thermal expansion stress and improve bonding strength, a phonon scattering layer and a negative thermal expansion buffer layer are embedded to fix a thermoelectric leg so as to improve internal thermal resistance and horizontal thermal matching performance of the high-performance thermoelectric device, internal package and external package are employed to prevent the thermoelectric material from being oxidized and sublimed and improve external collision-resistant capability, the technical bottlenecks of low energy conversion efficiency, small specific power, poor thermal stability, poor collision performance, complicated fabrication process and the like of a traditional thermoelectric device are effectively broken through, meanwhile, the thermal stability and the mechanical structural performance of the high-performance thermoelectric device are improved to a great extent, long-term and excellent electrical output performance is guaranteed, and the working environment is expanded.

The invention provides an in-situ polymerized surface modified fiber-based friction nano-generator and a preparation method thereof. The in-situ polymerized surface modified fiber-based friction nano-generator is characterized by comprising a friction electropositive nanofiber membrane having in-situ constructed silica nanoparticles (SiO2 NPs) on a surface, and friction electronegative nanofiber membrane having in-situ constructed polytetrafluoroethylenen nanoparticles(PTFE NPs). The surface charge of the friction nano-generator after in-situ polymerized surface modification is expected to increase by 10 to 300%, the short-circuit current is expected to increase by 20 to 300%, and the open circuit voltage is expected to increase by 50 to 300%. The friction nano-generator of the invention has high electric output performance, small volume, simple structure and short preparation process. With the further improvement of its performance, the friction nano-generator will have a broader prospect in the field of wearable electronics.

The invention discloses a preparation method of a fabric-based portable flexible pressure sensor. The method is characterized by comprising the following steps: preparing triboelectric positive fasciated yarns and triboelectric negative fasciated yarns, and weaving the obtained triboelectric positive/negative fasciated yarns as weft yarns and nylon yarns or PTFE filaments as warp yarns to form a corresponding triboelectric positive fabric; and combining the triboelectric positive fabric with a triboelectric negative fabric to form the fabric-based portable flexible pressure sensor. By improving the effective contact area between an electropositive friction material and an electronegative friction material in unit area, the electric output performance of a friction nano-generator is improved, and the sensing performance of the flexible pressure sensor based on the friction nano-generator is improved; the sensor is used for monitoring carry-on motion signals at human joint parts and monitoring human pulse signals at carotid arteries to obtain corresponding signal results with reference values such that effective reference bases are provided for medical diagnosis and health assessment.

The invention relates to a flexible piezoelectric energy collector based on a negative poisson ratio macroscopic graphene film. The collector comprises a flexible substrate, and a laminated structurepiezoelectric power generation unit fixed on the surface of the flexible substrate. A wire is arranged on the surface of the laminated structure piezoelectric power generation unit. The wire is used for leading out charges/voltages generated after tensile deformation of the flexible piezoelectric energy collector, and the laminated structure piezoelectric power generation unit comprises a negativepoisson ratio macroscopic graphene film and a flexible piezoelectric film. According to the invention, flexibility and high conductivity are utilized, the energy collector has a macroscopic graphenefilm with negative Poisson's ratio effect, a negative Poisson's ratio effect is introduced into the flexible piezoelectric energy collector. By means of the strain coupling between the piezoelectric film and the negative poisson ratio macroscopic graphene film in the laminated structure piezoelectric power generation unit, the tensile deformation of the piezoelectric film is changed from the original one-way stretching into stretching in two vertical directions in the plane when the device works, so that the electric output performance of the device is improved.

The present invention relates to a piezoelectric nanogenerator (PENG) that is capable of harvesting mechanical energy into electricity. The PENG comprises one dimensional (1D) and two dimensional (2D) nanostructures integrated together to form a composite nanostructure. A major advantage of the present invention is that the composite nanostructure provides enhanced electrical output and enhanced mechanical stability as compared to previously reported 1D or 2D nanostructures alone. Also described is a hybrid nanogenerator that combines the PENG with a triboelectric nanogenerator (TENG). A method of synthesizing the composite nanostructure PENG, in which the 1D and 2D nanostructures are grown together on the same substrate using a low temperature hydrothermal method is also described. The provided method is simple and cost-effective.

The invention relates to the technical field of catalysts, and provides an alloy nano-catalyst which comprises a carbon-based supporter and alloy nano-particles adsorbed on the surface of the carbon-based supporter, and the alloy nano-particles are wormlike. According to the alloy nano-catalyst provided by the invention, the alloy nano-catalyst takes a carbon base as a supporter, and the carbon base supporter is smooth in surface, few in gaps and relatively high in chemical stability; wormlike alloy nanoparticles are adsorbed on the surface of the carbon base supporter, the wormlike alloy nanoparticles have higher specific activity, and the structure exposes more alloy nanoparticle sites, so that the alloy nano-catalyst has good conductivity, higher chemical stability and high electrochemical stability; wormlike alloy nano-particles can be anchored on the surface of the carbon base supporter more stably, the stability is higher, and the alloy nano-catalyst can be applied more widely.

The invention relates to three-dimensional angle interlocking power generation fabric and a preparation method thereof. The three-dimensional angle interlocking power generation fabric is three-dimensional angle interlocking fabric formed by two yarn systems which are a warp system and a weft system, and composition yarn of the warp system and the weft system is different and is mechanical energyacquisition yarn or flexible conductive yarn; the largest power density of the three-dimensional angle interlocking power generation fabric is 48.45 mW/m<2>, the number of layers of the three-dimensional angle interlocking fabric is 2-10, the warp density is 14-18 count/5 cm, the weft density is 12-20 count/5 cm, and the gram weight us 0.6-1 g/cm<2>. The preparation method of the three-dimensionalangle interlocking fabric comprises steps as follows: the mechanical energy acquisition yarn and the flexible conductive yarn are taken as warp and weft and interwoven in a form of a three-dimensional angle interlocking structure, and the three-dimensional angle interlocking power generation fabric is prepared. The three-dimensional angle interlocking power generation fabric has a multi-layer structure, is easy to deform and has good power output performance, and the contact area between the warp and the weft is larger.

The invention discloses a preparation method of a sisal fiber paper-based friction nano-generator. The preparation method comprises the following steps: cleaning, drying and shearing sisal fiber raw materials, putting the sisal fiber raw materials into a high-temperature reaction kettle, and adding a NaOH solution for hydrothermal treatment; and carrying out suction filtration and cleaning on thesolid substance obtained by hydrothermal treatment for many times by using deionized water, and bleaching, drying and crushing the solid substance to obtain the dried sisal cellulose; dispersing 1-3gof sisal cellulose into 200-300mL of deionized water, carrying out suction filtration to form a film, carrying out rolling treatment on the sisal cellulose film by using a hydraulic machine, and drying to obtain the sisal cellulose paper; then using the sisal hemp cellulose paper and the polytetrafluoroethylene film as polar plates to assemble the sisal hemp cellulose paper-based friction nano-generator. The method is simple and easy to operate and low in material preparation cost; the sisal fiber is enabled to become friction material of friction nano-generator, electrical performance tests show that the sisal fibers have relatively good output performance and stability, and a new way is provided for resource utilization of the sisal hemp.

The invention discloses a friction nano-generator friction layer material as well as a preparation method and application thereof. The preparation method comprises the steps of carrying out laser etching on a friction layer A and a friction layer B so as to enable the roughness of the bottom surface of the friction layer A to reach 30-90% and enable the roughness of the top surface of the frictionlayer B to reach 30-90%; and carrying out plasma treatment respectively on the bottom surface of the friction layer A and the top surface of the friction layer B, wherein the plasma treatment time is1-120min, the plasma treatment voltage is 5-15KV, and the plasma treatment current is 0.5-0.6A. The invention provides a preparation method of the friction nano-generator friction layer material. Thepreparation method is low in cost and simple to operate. According to the preparation method, the selection range of an easily-obtained electronic polymer material and a volatile electronic polymer material is wide, the electron obtaining/losing performance of the obtained friction nano-generator friction layer material is high, then the electric output performance of the friction nano-generatoris improved by 50%-500%, and the application field is expanded.

The invention provides a heating starting method and a heating device of a solid oxide fuel cell stack. According to the method, fuel gas and air are preheated and then introduced into the galvanic pile to achieve the purpose of heating the galvanic pile; the problem that the inside and the outside of the electric pile are heated unevenly when the electric pile is heated by an electric heating furnace is solved, and preheated fuel gas and air are directly introduced into a three-phase boundary reaction area in the electric pile, so that the heating efficiency is high, the heating is balanced,and the electric pile has good, stable and adjustable electric output performance.

The invention discloses a power generation knitted piece, an intelligent sole and an intelligent carpet. The power generation knitted piece comprises a plurality of conductive shaft yarns arranged ina first direction, and a plurality of knitted yarns interspersed between the plurality of conductive shaft yarns and extending in the axial direction of the conductive shaft yarns, wherein the plurality of knitted yarns and the plurality of conductive shaft yarns form a planar or three-dimensional structure together, wherein the knitted yarns comprise a conductive beam and a dielectric layer covering the conductive beam; the conductive shaft yarns and the knitted yarns deform under an external force, the conductive shaft yarns make contact with the dielectric layers of the plurality of knittedyarns around the conductive shaft yarns, and during the contact and separation processes, an electrical output is generated between the conductive shaft yarns and the conductive beams of the plurality of knitted yarns. According to the power generation knitted piece, the energy conversion efficiency and the electrical output performance of the power generation knitted piece are improved, and meanwhile, the pressure sensing sensitivity is improved, and the application range of friction nanometer power generation fabric is expanded.

The invention relates to an energy conversion material and device technology, and aims to provide a preparation method and application of a titanium dioxide/carbon nanoflower composite PDMS film. The preparation method comprises the following steps of: mixing cyclohexane and polydimethylsiloxane, and stirring until the mixture is clear; dispersing a titanium dioxide/carbon nanoflower filling material in the solution to obtain a uniform suspension; and adding a curing agent and stirring, coating an acrylic plate with an aluminum electrode with the suspension in a spin coating manner, and drying and forming to obtain a film-shaped composite material. The method is simple in preparation process, high in repeatability and suitable for mass production. The interface polarization effect can be remarkably improved, and a large amount of local micro-capacitance is constructed in the composite material by an in-situ introduced conductive carbon simple substance, so that the dielectric property is synergistically improved, the surface charge density is improved, and the output performance of a friction nano-generator is further improved. The output performance of the friction nano- generator device can be regulated and controlled by adjusting the content of the titanium dioxide/carbon nanoflowers; and low-frequency mechanical energy can be converted into electric energy.

The invention relates to an all-degradable friction nano-generator and a preparation method and application thereof. The all-degradable friction nano-generator comprises a first friction layer and a second friction layer, the first friction layer comprises a first amino acid composite material layer and a first metal current collector layer which are sequentially overlapped; and the second friction layer comprises a second amino acid composite material layer and a second metal current collector layer which are sequentially overlapped. Amino acid crystal compounds with different functional group structures are introduced to the surface of the friction layer material in a manner of adding amino acids with wide sources into the friction layer material to form a composite material, so that the electron gain and loss capacities between the friction layers are greatly differentiated; the purpose of effectively improving the electric output performance of the friction nanometer generator is achieved, and the electric output performance is adjustable.

The invention discloses a bionic degradable friction nano-generator and a preparation method thereof, the friction nano-generator uses woven bamboo fiber cloth as a positive friction material and cotton cloth as a negative friction material, the two friction materials are contacted and separated, and the friction electricity generation effect and electrostatic induction are utilized to generate alternating current to realize power generation. Bamboo fibers are degradable and low in cost, have good flexibility and friction performance, can still keep good performance under the action of certain bending and torsion, and are beneficial for improving the power transmission performance of products. The friction nanometer generator disclosed by the invention is simple in preparation process, and the preparation efficiency is obviously improved.

The invention relates to a manufacturing method of a high integration-level flexible film thermoelectric cell. The method comprises the following steps of making micro-area lithography mask plates of a cold end conducting layer, an N/P type thermoelectricity monomer, a cold and hot end conducting interlayer insulating layer and a hot end conducting layer whose figures correspond to each other; using the lithography mask plate to make the cold end conducting layer and a cold end conducting layer output port on a micron-order polyimide film; making the N/P type thermoelectricity monomer; making the cold and hot end conducting interlayer insulating layer; making the hot end conducting layer; packaging. In the invention, the micron-order polyimide film is selected to be taken as an insulation matrix of the cell; based on a condition that the cell possesses good flexibility, the micro-area lithography mask plate is used to integrate multilayer materials into one body through a method of combining physical magnetron sputtering and microelectronic lithography. Hundreds to tens of thousands of P-N monomer pairs are integrated on a 0.1cm<2>-10cm<2>, an integration level of the cell is effectively increased and cell power output performance is greatly improved.