482results about "Kinetic-electric generator" patented technology

The invention discloses a preparation method and application of a novel ionized water gel-based moisture power generation material. The material is composed of a carbon coating fabric, ionized water gel and a patch metal electrode. Wherein the nano carbon black is used as a conductive filler of the hydrogel and can enhance electric energy output by promoting functional group dissociation and ion migration. The high-hygroscopicity sea salt in the hydrogel can enhance the capture and transmission capability of the material on water molecules in the atmosphere, and ensures the continuous power output capability of the moisture power generation material. Due to the design of the zigzag dry-wet interface, the wettability between the hydrogel and the carbon black coating can be improved, the moisture absorption rate is increased, the contact area is increased, and therefore the power generation power is improved. The metal patch electrode can ensure the stability of long-term power generation of the material, and can be customized to reduce the contact resistance. A moisture power generation device prepared from the material can be used as a passive energy supply device and is suitable for the fields of self-powered sensors, wearable electronic equipment and the like.

The invention belongs to the technical field of green energy power generation, and discloses a preparation method and application of a plasmon effect enhanced photovoltaic power generation device.The preparation method comprises the steps that a conductive substrate material is evenly dispersed in a solvent and then treated with a reducing agent to form substrate ink; the base material ink is prepared into a three-dimensional structure with pores by utilizing an additive and subtractive material technology, and a stable substrate material is formed through high-temperature treatment; and immersing the stable substrate material in a plasmon metal solution for a first preset time, taking out the substrate material, immersing the substrate material in a reducing agent solution for a second preset time, taking out the substrate material, and curing the substrate material by using an additive and subtractive material technology to form the water photovoltaic power generation device with enhanced plasmon effect. According to the preparation method, a three-dimensional block device with an interface pore structure is constructed through an additive and subtractive material technology, the light absorption capacity is improved, the utilization rate of light energy is improved through plasmon nanoparticles, the interface temperature of the device is increased, extra carriers are provided for the power generation process, and the output power of the device can be improved.

The invention provides a photoresponse water photovoltaic power generation device based on nano tungsten oxide and a preparation method of the photoresponse water photovoltaic power generation device, and relates to the field of water evaporation induced new energy power generation and novel photoelectric detection. The water photovoltaic power generation device is composed of a substrate, a positive electrode, a negative electrode and a slurry layer, wherein the slurry layer is obtained by drying slurry formed by mixing tungsten oxide, a Nafion solution and deionized water; the water photovoltaic power generation device can generate an open-circuit voltage of 1.4-1.8 V and a short-circuit current of 100-140 nA under the evaporation induction of deionized water. Under the illumination with the wavelength of 435 nm, the output voltage and current change along with the illumination intensity, and the material has the obvious light response characteristic and is expected to be used for optical detection and hydrovolt generator theory research.

The invention discloses an ion thermoelectric gel battery as well as a preparation method and application thereof. The ion thermoelectric gel battery comprises a metal electrode, ion gel and a carbon electrode which are arranged in sequence, the ionic gel comprises the following components: a gel matrix and an oxidation / reduction couple. According to the ion thermoelectric gel battery, the organic matrix is used as the gel matrix, the oxidation / reduction couple is added, and the concentration and proportion of the oxidation / reduction couple are adjusted, so that the thermoelectric chemical effect can be improved, and high ion thermoelectric potential and high output power density can be obtained. The metal carbon asymmetric electrodes are used, the in-situ micro primary battery effect and the coupling enhanced thermoelectric chemical effect are introduced, the output voltage, the current density and the output power density of the ionic thermal battery are improved, the output power density can reach 1.6 W m <-2 > under the temperature difference of 4K, and the ionic thermal battery has good thermoelectric conversion performance.

The invention relates to a wearable flexible vibration sensing sensor for a humanoid robot and a preparation method of the wearable flexible vibration sensing sensor. The sensor structure comprises an upper packaging layer, a lower packaging layer, a moisture absorption layer, a hydrogel layer, a graphene layer, an electrode layer and a flexible circuit board. Wherein the upper packaging layer and the lower packaging layer protect the internal structure, the moisture absorption layer enhances the moisture absorption capacity in the environment, the hydrogel layer maintains moisture and forms a concentration gradient, the graphene layer enhances the sensitivity of the sensor, the electrode layer collects ion migration to generate voltage, and a signal amplification circuit and a wireless transmission module are embedded in the flexible circuit board. The method is characterized in that a vibration signal is converted into voltage change through ion migration between the hydrogel layer and the graphene layer, and accurate vibration sensing is achieved. The sensor has high sensitivity, quick response and good flexibility, is suitable for being integrated into the humanoid robot, and improves the environmental perception and interaction performance of the humanoid robot.

The invention belongs to the field of new energy and relates to a novel electric energy acquisition technology. The non-equilibrium conductors are substances with the same Fermi level, and the contact potential generated by the non-equilibrium field effect existing between the non-equilibrium conductors with different mass and form is converted into electric energy for utilization. A medium (hereinafter referred to as an electric conduction control medium) which has electric conduction performance and controls voltage and limits electric conductivity under a certain condition is placed between conductors, good close contact is achieved between the medium and the conductors, and the result is that under the effect of the electric conduction control medium, non-equilibrium field contact potential is converted into electric energy capable of being continuously output.

The invention belongs to the technical field of functional materials, and particularly relates to moisture power generation fabric and a preparation method and application thereof. The moisture power generation fabric comprises a fabric substrate modified with a conductive and hydrophilic reinforcing material, and a surface coating area of the fabric substrate is loaded with a moisture absorption power generation functional material. The proton transmission efficiency is improved through a specific charge transfer effect and an ion occupancy effect among components of the moisture absorption and power generation functional material, and the permanent asymmetric moisture absorption difference on two sides of a coupling interface of a coated area and an uncoated area is used as a stable driving force for proton transmission, so that lasting direct current output is formed. The power generation performance of the moisture power generation fabric is determined by power generation composite parameters (namely the product of stable power generation time and the sum of relative humidity and temperature under the same weight and the quotient of the product and the water evaporation difference value on the two sides of a coupling interface), and the power generation composite parameters and the power generation composite parameters are in a nonlinear relation of increasing and then decreasing. Therefore, the power generation performance of the moisture-induced all-weather sustainable power generation fabric can be quantitatively controlled and optimized by adjusting the power generation composite parameters.

The invention relates to a moisture power generation device and a preparation method and application thereof, and belongs to the technical field of new energy materials. The moisture power generation device comprises a first electrode, a second electrode, a photo-initiation hydrogel active material and a container, the second electrode and the photo-initiation hydrogel active material are sequentially loaded in a container; the first electrode covers the surface of the photo-initiation hydrogel active material; the first electrode comprises a carbon surface electrode with a porous structure and a thermal initiation hydrogel active material loaded on the surface of the carbon surface electrode; the carbon surface electrode with the porous structure is obtained by carbonizing the carbonizable polymer film through laser direct writing. The moisture power generation device has the advantages of being easy to assemble, suitable for large-scale production, capable of continuously generating power and high in power generation efficiency.

The invention provides a skin-core structure moisture power generation yarn, the yarn at least comprises a metal core layer, a wrap yarn layer and a conductive coating, the wrap yarn layer comprises lithium chloride doped polyvinyl alcohol fibers and tightly wraps the periphery of the metal core layer through conjugate electrostatic spinning, and the conductive coating is nano conductive silver paint. And the conductive coating is not in direct contact with the metal core layer. The preparation method comprises the following steps: firstly, adding lithium chloride powder into deionized water, stirring at normal temperature until complete dissolution, then adding polyvinyl alcohol powder, heating and stirring until complete dissolution, standing and defoaming to prepare a wrap yarn layer spinning solution; performing conjugate electrostatic spinning on the prepared skin layer spinning solution to form nanofiber wrap yarn on the outer layer of the metal core; nano conductive silver paint is sprayed on the surface of the wrap yarn layer, and the wrap yarn layer is dried in the air. The yarn has good flexibility, and has excellent surface waterproof and moisture permeable performance, stability and reusability while forming stable output current and voltage.

The invention belongs to the technical field of new energy materials, and discloses an N-site alcoholic hydroxyl spiropyrane, a polyionic liquid material, a flexible stretchable nano-generator and a preparation method, and the polyionic liquid material is prepared based on copolymerization of the provided novel N-site alcoholic hydroxyl spiropyrane and ionic liquid; the polyion liquid material can be used for preparing a flexible and stretchable nano generator; the stretchability of the nano-generator is realized, the output electrical performance of the nano-generator can be effectively adjusted by adjusting the stretch rate, and the nano-generator can be applied to the fields of intelligent flexible wearable equipment, health detection and the like and has a huge application prospect.

The invention relates to a moisture power generation device and a preparation method and application thereof, and belongs to the technical field of moisture power generation. The moisture power generation device comprises a flexible substrate, an upper electrode, a lower electrode and a power generation active material, the power generation active material is arranged between the upper electrode and the lower electrode; the power generation active material is of a core-sheath structure, a sheath layer on the edge is of a cross-linked hydrogel structure, and a core layer is a hydrogel precursor solution; the sheath layer limits the appearance of the hydrogel precursor solution in the core layer and is in contact with the atmosphere. The core-sheath structure of the power generation active material is prepared by an ultraviolet light induced polymerization / gelation one-step method. The moisture power generation device provided by the invention ensures stable and continuous electric energy output and remarkably improved moisture-electric energy conversion efficiency, adopts a miniaturized design, has the remarkable advantages of compact structure and convenience in integrated application, and is beneficial to large-scale production due to assembly convenience.

The present invention relates to a moisture-triboelectric dual-mode power generation device and its applications. The power generation material of this invention features a unique layered structure and hierarchical porosity. Its components and structural properties are highly controllable, highly adaptable, and have great potential for large-scale production. This effectively ensures the excellent electrical performance and application potential of the dual-mode power generation system. The dual-mode power generation system provided by this invention achieves complementary power collection from moisture and triboelectricity, promoting the research and development of green and sustainable power sources.

The invention discloses a preparation method of a PVA / chitin porous nanosheet layered film for salinity gradient power generation, and belongs to the technical field of bio-based material functionalization. The preparation method comprises the following operation steps: firstly, preparing a chitin porous nanosheet by utilizing an acid steam combined ultrasonic strategy; modifying the surface of the chitin porous nanosheet with rich positive charges through quaternization reaction, and performing suction filtration and drying to obtain a porous nanosheet layered film; and finally, circularly freezing, thawing and packaging the porous nanosheet layered film by using polyvinyl alcohol hydrogel to prepare the PVA / chitin porous nanosheet layered film. According to the PVA / chitin porous nanosheet layered film, by means of combination of chitin nanosheet layer gap channels and micro-nano pore channels in nanosheet surfaces, ion transmission paths are increased, ion transmission resistance is reduced, the microstructure of the layered film is effectively stabilized jointly by means of the interlayer weak force effect and the hydrogen bond bonding effect between polyvinyl alcohol molecules, and therefore the film has the advantages of being capable of being used for preparing the composite film. And the optimal salinity gradient power generation output power density reaches 7.33 W / m < 2 >.

The invention provides a flexible ceramic nanofiber membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: adding polyvinyl alcohol into water, and heating and stirring in a water bath kettle until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution; stirring the precursor material, an acid catalyst and water until hydrolysis to obtain oxide substrate sol; mixing a polyvinyl alcohol solution with the oxide substrate sol, adding a pore forming agent, uniformly mixing, and performing electrostatic spinning to obtain a precursor composite nanofiber membrane; and calcining the precursor composite nanofiber membrane at high temperature to obtain the flexible ceramic nanofiber membrane. According to the prepared flexible ceramic nanofiber membrane, fibers are in a shape similar to sugarcoated haws on sticks, the porosity is high, based on the charge property of the flexible ceramic nanofiber membrane, in the water-induced power generation process, counter ions are generated on the solid-liquid contact surface in an electrolyte aqueous solution and a ceramic fiber channel, and the water-induced power generation efficiency is improved. Good flexibility and stability are shown through flowing potential driving, continuous power generation can be achieved, and high output voltage is obtained.

The invention relates to a patterned water photovoltaic power generation device and a preparation method thereof, and belongs to the technical field of water photovoltaic power generation devices. The preparation method comprises the following steps: S1, dissolving a complexing agent, zinc salt and reducing sugar in water to obtain a zinc precursor solution; s2, printing the zinc precursor solution on the surface of a substrate through printing equipment to form a pattern, and carrying out thermocuring and annealing to obtain a patterned zinc oxide film; and S3, transferring the patterned zinc oxide thin film to the surface of the flexible substrate, and then manufacturing an electrode on the patterned zinc oxide thin film to obtain the patterned water photovoltaic power generation device. The patterned photovoltaic power generation device has a voltage output of more than 9 V, and has device stability for continuous 7 hours.

A deep and far sea aquaculture system based on photovoltaic-salinity difference coupling power generation hydrogen production is characterized in that solar energy is converted into electric energy through an arranged photovoltaic power generation module, and the photovoltaic power generation module is connected with a storage battery to realize energy storage; the arranged seawater desalination and electrolysis module is combined with a heliostat field and a deep sea low-temperature environment, low-energy-consumption seawater evaporation and electrolysis hydrogen production are achieved, and it is guaranteed that electric energy of photovoltaic power generation can be stably used for hydrogen production; the salinity difference power generation module is used for generating power by utilizing the concentration difference between strong brine generated in the seawater desalination process and common seawater, so that extra electric energy is provided for the system, and the influence of direct emission of the strong brine on the environment is reduced; the arranged breeding module is provided with an automatic feeder and a dissolved oxygen monitor which are connected with an oxygen storage device, so that the dissolved oxygen concentration of the water body is kept stable, and the breeding conditions are further optimized. According to the system, the energy conversion efficiency can be improved, the seawater desalination energy consumption can be reduced, and an efficient and ecological solution is provided for the combination of renewable energy sources and fishery.

The invention relates to a charging type moisture power generation device based on a double-layer polymer film and a preparation method thereof, and belongs to the technical field of moisture power generation. Comprising an active electrode, double-layer polymer films and an inert porous electrode which are sequentially arranged, the first polymer film of the double-layer polymer films is a mixture of ferric hydroxide, polystyrolsulfon acid and polyvinyl alcohol, the second polymer film of the double-layer polymer films is poly (diallyldimethylammonium chloride), the first polymer film is in contact with the active electrode, and the second polymer film is in contact with the inert porous electrode. The second layer of polymer film is in contact with the inert porous electrode; the active electrode is made of metal with the standard electrode potential ranging from-1 V to + 0.5 V, and the inert porous electrode is made of metal with the standard electrode potential larger than + 1 V. Through moisture evaporation and an oxidation-reduction reaction, the battery can generate electricity by itself in a moisture environment, and can be self-repaired through the oxidation-reduction reaction when the performance is reduced, so that a charging effect is achieved.

The invention discloses a morning-glory-shaped solar water evaporation generator and a preparation method thereof, and the preparation method specifically comprises the following three steps: S01, preparing wood slurry; s02, hydrogel is prepared, specifically, the wood slurry prepared in S01 serves as a substrate material, natural hydrogel is added, then carbon black and a nitrogen-containing heterocyclic compound capable of providing a large number of charged functional groups are added, and full stirring is conducted to enable the wood slurry to be fully charged; adding a cross-linking agent into the wood slurry to promote aldol condensation reaction of the wood slurry; and S03, preparing the solar water evaporation generator: pouring the solution subjected to aldol condensation reaction into a customized morning-glory-shaped mold, freezing, demolding and unfreezing to obtain the morning-glory-shaped solar water evaporation generator. The morning-glory-shaped water evaporation generator is structurally divided into three layers, the mangrove is simulated to secrete salt, salt crystallization is achieved only on the edge of the water evaporation generator, salt crystal accumulation is effectively avoided, continuous obtaining of fresh water and electric energy can be conducted, and efficient utilization of resources is achieved.

The invention discloses a three-dimensional bio-based hierarchical pore nanocarbon water photovoltaic power generation material as well as a preparation method and application of the three-dimensional bio-based hierarchical pore nanocarbon water photovoltaic power generation material. The specific technical scheme of the preparation method comprises the following steps: firstly, preparing an acetic acid solution containing chitosan, glucose and borax, and standing the solution at room temperature for 24 hours; then, freeze-drying the precursor solution, and pre-carbonizing xerogel in a drying oven for a certain time; and finally, adding a certain amount of water into the pre-carbonized dry gel, putting the pre-carbonized dry gel into a reaction kettle with a polytetrafluoroethylene lining, reacting for a certain time at a certain temperature, dialyzing the obtained wet gel, and drying at normal temperature and normal pressure to prepare the nano carbon aerogel with the hierarchical pore structure. The nano carbon aerogel has good hydrophilicity, abundant surface charges and a hierarchical pore structure, and is a low-cost and excellent water evaporation induced power generation material.

The invention relates to a vermiculite nanosheet film-based three-dimensional moisture generator and a preparation method thereof, the vermiculite nanosheet film-based three-dimensional moisture generator comprises a support, a bottom positive electrode, a functional layer, a bottom negative electrode and a solution pool, the support is successively coated with a positive electrode slurry and a functional mixture, the functional mixture comprises a vermiculite slurry and an adhesive, and a part of the functional layer is wiped to expose the bottom positive electrode. A middle interlayer positive electrode and a middle interlayer negative electrode are embedded into the solution tank, and a moisture absorption mixture is injected into the solution tank and comprises a polymer electrolyte and a fixing agent; the electrode extends out of the solution tank, the bottom positive electrode is close to the middle interlayer positive electrode, the bottom negative electrode is close to the middle interlayer negative electrode, the bottom positive electrode and the bottom negative electrode are oppositely arranged, and the middle interlayer positive electrode and the middle interlayer negative electrode intersect with the bottom positive electrode and the bottom negative electrode. Compared with the prior art, the non-flowing stable moisture absorption layer is formed, and use is more convenient; energy can be fully used, the mutual charging and discharging process is completed, and the recovery speed is increased.

According to the integrated system capable of achieving soil energy collection and soil moisture content detection, on one hand, through the design of the electrodes of a double-helix structure, the contact area between the electrodes and soil is increased, and then the electric energy collection efficiency of a soil energy collection module is improved; and on the other hand, the moisture content measuring module converts the soil moisture content into a voltage value through a sampling resistor on the basis of utilizing the electric energy collected by the soil energy collecting module, the measuring module measures the soil moisture content based on the voltage value, the measuring method is simple, the measuring precision is high, and an external power supply is not needed. According to the technology, self-powered soil moisture content monitoring is achieved, the technology has application prospects in intelligent agriculture soil condition monitoring and landslide soil environment monitoring, meanwhile, the detection module, the moisture content measurement module and the soil energy collection module of the whole system can be integrated into a whole, and miniaturization of products can be achieved easily.

The invention provides a chitosan-based photovoltaic power generation device and system, and belongs to the technical field of new materials. The water photovoltaic power generation device provided by the invention adopts chitosan as a functional layer material, the chitosan is proved to have good biocompatibility and biodegradability, and a degradation product has no toxic or side effect on a human body, is not accumulated in the body and has no immunogenicity, so that the water photovoltaic power generation device has an extremely wide prospect in the field of biomedicine. The preparation method of the photovoltaic generator device provided by the invention is simple and easy, the production efficiency is high, good economical efficiency and biocompatibility are achieved, and a novel sustainable power supply scheme can be provided for human body wearable and implantable bioelectronic devices.

A fabric wet power generation material based on molybdenum disulfide and a preparation method and use therefor. Taking molybdenum disulfide as a base material, an in-situ grown MoS2 carbonized fabric and a MoS2-based conductive cellulose fiber fabric are prepared by using a hydrothermal method. Then the two fabrics are superposed to form a double-potential layer, so that under a wet condition, the textile uses water evaporation as a driving force, and the water molecules migrate in the double-conductive layers to generate a current, so as to achieve self-power generation, and the fabric wet power generation material is prepared. The fabric wet power generation material provided by the present invention uses metal as a negative electrode, and after being packaged, the fabric wet power generation material is applied to a wet power generation apparatus. In the fabric wet power generation material provided by the present invention, a transition metal disulfide nanomaterial having a three-dimensional micro-channel structure is constructed on the nano scale, and the structure ensures a large moisture conduction conductivity; meanwhile, a large number of pore channels existing in the three-dimensional structure can shorten the ion transmission distance, so that the power generation performance is improved, and there are advantages of being simple and rapid in preparation process and high in yield, and being beneficial to industrial production and application in the field of flexible intelligent textile.

The invention provides a hydrogel-based radiation refrigeration moisture power generation material and a preparation method and application thereof, and belongs to the technical field of moisture power generation materials.The hydrogel-based radiation refrigeration moisture power generation material comprises a nano carbon black layer, a conductive hydrogel layer and a titanium dioxide layer which are sequentially stacked; the conductive hydrogel layer comprises a hydrogel matrix, a conductive filler and a temperature-sensitive material; the temperature-sensitive material comprises at least one of poly (N-isopropylacrylamide), a polyethylene glycol and polylactic acid copolymer and vanadium oxide; the cross section of the hydrogel-based radiation refrigeration moisture power generation material is of a W-shaped structure. The conductive hydrogel layer is of a three-dimensional network structure with conductivity and temperature-sensitive characteristics; the titanium dioxide layer realizes efficient sunlight reflection, the nano carbon black layer enhances heat conduction and conductivity, and the W-shaped structure promotes moisture flow and circulation; the multifunctional power generation device prepared based on the hydrogel-based radiation refrigeration moisture power generation material has good radiation refrigeration and moisture power generation performance, and is excellent in stability and durability.

The invention provides a method for improving the performance of an MXene-based water evaporation power generation device, and belongs to the technical field of water evaporation power generation devices. The method comprises the following steps: mixing FeCl2. 4H2O, deionized water, ascorbic acid and ethylene glycol, and introducing N2 or Ar to obtain an etching solution; adding carbon nanotubes into the etching liquid, and adjusting the pH value to 4; adding MAX powder into the etching solution, and carrying out etching reaction and standing treatment to obtain supernate; centrifugally washing and drying the supernate to obtain a precipitate; preparing the precipitate into a solution, performing suction filtration on filter paper, and performing drying treatment to obtain an MXene / CNT / filter paper composite film; and connecting conductive parts to the upper and lower ends of the MXene / CNT / filter paper composite film to obtain the water evaporation power generation device. The CNT is synchronously assembled through in-situ hydroxyl radical acidification and etching, so that the CNT and the MXene film form chemical bonding, and the current and voltage of the device are effectively improved.

The invention discloses a moisture power generation device and a preparation method thereof. The invention discloses a preparation method of a moisture power generation device. The preparation method comprises the following steps: (1) preparing polypyrrole modified dust-free paper; (2) sequentially placing the polypyrrole modified dust-free paper, a sodium alginate / graphene oxide mixed solution and the polypyrrole modified dust-free paper in a directional freeze-drying device, freezing with liquid nitrogen, and then freeze-drying; and (3) soaking the freeze-dried product in a CaCl2 solution, pressing the product into a sheet, soaking the sheet in a LiCl solution, and blow-drying the sheet to obtain the moisture power generation device. The prepared moisture power generation device has the advantages of being good in structural stability and excellent in moisture power generation performance, and meanwhile the preparation method is simple and low in cost.

The invention relates to the technical field of new energy power generation, in particular to a high-current moisture generator under low humidity and a preparation method thereof.The high-current moisture generator comprises a first electrode, an ionized water gel layer and a second electrode which are sequentially arranged, the ionized water gel layer has a salt concentration gradient, and the work functions of the first electrode and the second electrode are different; a first electrode is uniformly coated with an ionized water gel layer added with hygroscopic salt, and then the other side of the ionized water gel layer is covered with a second electrode, so that the moisture generator with a first electrode-ionized water gel-second electrode as a basic unit is formed. The moisture generator prepared by the invention is based on the synergistic effect of the primary battery effect and moisture power generation, so that the moisture generator has large short-circuit current at low humidity, the maximum short-circuit current can reach 5mA, and the moisture generator has relatively high power output density at low humidity and has a good self-power-generation function.

The invention belongs to the technical field of renewable resource utilization and new energy, and relates to a wood-based water photovoltaic power generation material and a preparation method and application thereof.The wood-based water photovoltaic power generation material is prepared by taking natural wood as a raw material, performing chemical modification treatment and combining directional freeze drying and salting-out treatment. The wood-based water photovoltaic power generation material with relatively good mechanical strength is prepared by using the wood-based material as a raw material, the wood-based material has a highly-oriented porous structure, and under the conditions of 25 DEG C, standard atmospheric pressure and relative air humidity RH 30%, a 200-mesh copper mesh is used as an electrode, and the open-circuit voltage of a nano power generation device obtained by assembling in deionized water reaches 110 mV, and the short-circuit circuit reaches 0.74 mA. The material is simple in preparation process and wide in application scene, adopts natural high polymer materials as raw materials, has the environment-friendly advantages of reproducibility and biodegradability, and has a wide application prospect in the field of new energy materials.

The moisture power generation device provided by the invention at least comprises a core layer, a skin layer and a conductive metal wire wound outside the skin layer, the skin layer comprises polyvinyl alcohol, the core layer comprises thermoplastic polyurethane and conductive filler, the skin layer wraps the core layer, and the conductive metal wires are not in direct contact with the core layer. The preparation method at least comprises the following steps: completely dissolving polyvinyl alcohol powder in a mixed solution of water and DMSO to prepare a skin layer spinning solution; stirring and mixing the DMF solution of the thermoplastic polyurethane powder and the DMF dispersion liquid of the conductive filler at a high speed to prepare a core layer spinning solution; and spinning the skin layer spinning solution and the core layer spinning solution at different extrusion speeds, carrying out coagulating bath and drying treatment, and finally winding a metal wire on the periphery of the skin layer to prepare the moisture power generation device. The device has good thin moisture absorption performance, can generate more current, improves the output power of the power generation device, is simple in preparation process, facilitates continuous production, and can be widely applied to flexible wearable equipment and self-powered power supplies.

The invention discloses a wood-based evaporation-driven photovoltaic power generation device and a preparation method thereof.The preparation method comprises the steps that natural beech serves as a matrix, and a surface gradient hydrophilic structure is constructed through pretreatment, deep eutectic solvent DES selective delignification treatment, citric acid modification carboxyl introduction and surface silane modifier spraying in sequence; directional transmission of water is realized through an anisotropic micro-channel reserved in wood, and stable water vapor flow induction potential is generated by combining ion selective migration induced by surface fixed charges and an interface evaporation process driven by a top photo-thermal layer, so that electric energy is continuously output. The device has good environmental adaptability, can stably output voltage and power in a high-humidity or high-salt environment, and shows excellent durability and expansibility. The method is environmentally friendly, the process is simple, functional high-value utilization of wood can be achieved, and the method is suitable for flexible electronic or distributed energy supply systems such as low-power-consumption sensors and environment energy collectors.