304results about "Kinetic-electric generator" patented technology

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 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 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 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 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 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.

The invention provides a water evaporation power generation device based on an MXene / filter paper composite film and a preparation method, and belongs to the technical field of water evaporation power generation. The preparation method comprises the following steps: adding FeCl2. 4H2O or FeSO4. 7H2O and ascorbic acid into a mixed solution of ethylene glycol and water, and stirring under a water bath condition to obtain an etching solution; slowly adding MAX powder into the etching solution, and carrying out magnetic stirring etching reaction to obtain a product solution; performing centrifugation, suction filtration and drying treatment on the product solution to obtain MXene solid powder; dissolving the solid powder in deionized water to form a solution, and carrying out suction filtration treatment on the solution on filter paper to obtain an MXene / filter paper composite film; the conductive parts are connected to the upper end and the lower end of the MXene / filter paper composite film, the water evaporation power generation device is obtained, the MXene stripping process is simple, the subsequent complex treatment process is not needed, and strong acid and virulent chemicals are not contained.

The invention provides an energy storage concrete guardrail and a preparation method thereof, the guardrail comprises a super capacitor and a concrete outer layer, the super capacitor comprises two concrete composite electrodes arranged at an interval and an electrolyte sealed in a gap between the concrete composite electrodes; the concrete composite electrode comprises a concrete electrode and a current collector inserted into the concrete electrode, and the concrete composite electrode is mainly prepared by the following steps: uniformly mixing second concrete mortar, paper fibers, nano carbon black and a water reducing agent to prepare conductive concrete mixed slurry; and pouring the conductive concrete mixed slurry into a mold, and shaping and curing the conductive concrete mixed slurry and a current collector. The concrete composite electrode material adopted by the energy storage concrete guardrail has relatively high specific capacitance and mechanical strength and is low in cost, so that the energy storage concrete guardrail realizes integration of an energy storage function and safety protection under the condition that the energy storage concrete guardrail meets the requirements of structural safety and durability.

The invention is applicable to the technical field of new energy materials and water treatment, and provides solar-driven multifunctional composite hydrogel and a preparation method and application thereof, the multifunctional composite hydrogel comprises dual-network hydrogel, a nanofiber skeleton and functional particles; the double-network hydrogel is formed by interpenetrating and cross-linking a polyelectrolyte hydrogel and a temperature-sensitive hydrogel; the functional particles are loaded in a three-dimensional porous network structure formed by the double-network hydrogel and the nanofiber skeleton. When the device floats on the surface of a water body, efficient solar interface evaporation water production, stable power generation based on the water photovoltaic effect and efficient adsorption removal of nitrogen and phosphorus nutritive salt in the water body can be synchronously achieved under illumination, and therefore algae growth is inhibited. According to the invention, the integrated collaborative management of water collection, energy conversion and ecological restoration is realized, the preparation process is simple, the environmental adaptability is high, and an innovative scheme is provided for solving the distributed water-energy supply and ecological environment problems in coastal, island and other regions.

The invention discloses a high-stability salinity gradient power generation film, a preparation method and application thereof, and a self-supporting film with an ordered layered structure is prepared by compounding montmorillonite MMT nanosheets and nanocellulose and combining vacuum filtration and gradient drying processes. The MMT nanosheet layered structure provides a directional ion channel, the negative charge surface enhances the cation selectivity, the nanocellulose flexible network inhibits MMT stacking, and the hydrogen-bond interaction improves the interface bonding force. The power density of the thin film reaches 4-6 W / m (50 times of salinity difference), the tensile strength is larger than or equal to 20 MPa, and the power attenuation rate is smaller than or equal to 5% after the thin film continuously operates for 100 hours. The preparation process is green and controllable, is suitable for seawater-river water and industrial wastewater salinity gradient power generation scenes, and has large-scale application potential.

The invention belongs to the technical field of new energy power generation equipment, and particularly discloses a water absorption power generation device based on a TiO2 film and a preparation method and application thereof.The power generation device comprises a power generation assembly and an aqueous solution or water vapor or an aqueous ion solution, and the power generation assembly comprises a first electrode, a diaphragm and a second electrode; the first electrode is an FTO-TiO2 thin film, and the second electrode is a conductive electrode which is not easy to corrode. According to the water absorption power generation device based on the TiO2 thin film and the preparation method and application thereof, the prepared power generation device generates electric energy under the condition of low water content, and different from a traditional water evaporation power generation device structure, the power generation device adopts a sandwich device power generation structure and has the advantages of being simple, high in reliability, rapid in power generation and the like.

The application discloses a kind of efficient silicon-based water-voltage devices and preparation method thereof, the silicon-based water-voltage device is composed of positive electrode, hole selective transport layer, silicon nanostructure, silicon substrate and negative electrode from top to bottom, the top end part of the silicon nanostructure is embedded in the hole selective transport layer.This application introduces hole selective transport layer in the interface of silicon nanostructure / positive electrode, uses the internal electric field formed by high work function hole selective transport layer in interface to prevent the migration of electron to positive electrode, realizes the selective transport of hole, reduces interface recombination loss to improve charge separation and collection efficiency;At the same time, the hole selective transport layer introduced realizes the transition of silicon nanostructure and positive electrode from point contact to surface contact, reduces the contact resistance of positive electrode interface, further promotes the efficient transport of hole at interface, thereby increases the collection efficiency of electrode to hole, under the synergistic effect of the above, effectively improve the electrical properties of silicon-based water-voltage device.

The invention discloses an ionic gel moisture power generation and power supply system and a preparation method and application thereof, and belongs to the technical field of functional materials and waste gas monitoring. According to the system, dopamine, 1-vinyl imidazole, n-bromobutane and acrylic acid are used as raw materials, and an ionic gel moisture power generation material is prepared through an ultraviolet curing process; carbon cloth is used as an electrode to assemble a moisture power generation device, the device is integrated with a plastic pipe, and stable power support is provided for a waste gas monitoring sensor in the pipe. The ionic gel prepared by the invention has excellent cohesiveness, moisture responsiveness, ionic conductivity and mechanical stability, and the ultraviolet curing process is efficient and environment-friendly; the moisture power generation device can utilize environmental moisture to continuously generate power, solves the problem that a traditional waste gas monitoring sensor depends on an external power supply or frequently replaces a battery, is adaptive to a complex application scene of a plastic pipe, and has a wide industrial application prospect.

The present invention relates to a MSL membrane with enhanced osmotic energy conversion and a preparation method thereof, belonging to the field of composite material technology. SL is dissolved in water and stirred at room temperature to obtain an SL solution. A MXene nanosheet solution and EGDE are added to the SL solution and mixed. The mixture is stirred under nitrogen, centrifuged, and repeatedly washed until the supernatant reaches neutrality. The precipitate is then redispersed to obtain uniform MSL nanosheets, thereby obtaining a two-dimensional channel MSL membrane. The present invention combines SL, which has abundant functional groups, with MXene, not only addressing the water stability issues of 2D MXene but also providing a larger surface charge for selective ion transport. The ordered MXene skeleton channels provide a shorter permeation path for rapid ion transport, resulting in an MSL membrane with ultra-low resistance.

The invention discloses a droplet nanometer friction / photo-thermoelectric hybrid power generation device and a preparation method thereof. The hybrid power generation device comprises a liquid drop power generator part and a photo-thermal power generator part, wherein the liquid drop power generator part is mainly formed by integrating a capacitor and liquid drop friction power generation, and the photo-thermal power generator part is mainly composed of a temperature difference semiconductor. The preparation method of the device mainly comprises the following steps: carrying out surface treatment on a zinc sheet, so that a layer of candle ash is uniformly attached to the surface of the zinc sheet to obtain the treated zinc sheet; uniformly coating a layer of polydimethylsiloxane (PDMS) on the surface of the candle ash, and heating in an oven for two hours for curing and forming; fixing a copper electrode on the surface of the PDMS, and welding a lead on the copper electrode and the zinc sheet; the temperature difference semiconductor and the zinc sheet are combined together through heat-conducting silicone grease; a radiation cooling plate is attached to the cold end of the temperature difference semiconductor; and wires are respectively welded at the hot end and the cold end of the temperature difference semiconductor. The droplet nanometer friction / photo-thermoelectric hybrid power generation device provided by the invention is simple in structure and convenient to manufacture, can continuously and stably output direct current voltage without depending on single weather, and has a wide application prospect.

The invention discloses a permeation power generation method based on a polyelectrolyte modified nano-channel. The power generation method comprises the following steps: grafting a polyelectrolyte brush layer on the surface of the nano-channel through a covalent bond; injecting electrolyte solutions with different concentrations into the two ends of the nano-channel respectively to form a concentration gradient; applying a temperature gradient opposite to the concentration gradient direction to the two ends of the nano channel, so that the temperature difference between the high-temperature side and the low-temperature side is 40K; regulating and controlling the pH values of the high-concentration electrolyte solution and the low-concentration electrolyte solution, so that the pH values of the solutions on the two sides are both smaller than the equipotential point of the polyelectrolyte brush layer, or the pH values of the solutions on the two sides are both larger than the equipotential point of the polyelectrolyte brush layer; electrodes are arranged on the two sides of the nanometer channel, ion migration is cooperatively driven through concentration gradient, temperature gradient and ion selectivity of the polyelectrolyte brush layer to generate permeation current and permeation voltage, and permeation power generation is achieved.

The invention provides an ion selective membrane, a preparation method thereof and a method for synchronously recovering resources and energy in neutralization reaction. The ion selective membrane takes a two-dimensional nano material as a main body skeleton, one-dimensional nano materials are doped in the main body skeleton, and the one-dimensional nano materials and the one-dimensional nano materials as well as the one-dimensional nano materials and the two-dimensional nano materials are cross-linked through a cross-linking agent; the two-dimensional nano material is MXene, graphene oxide, molybdenum disulfide, vermiculite, a two-dimensional metal organic framework material or a two-dimensional covalent organic framework material; the one-dimensional nano material is sodium carboxymethyl cellulose, sodium hydroxy propyl cellulose or aramid nano fiber. The ion selective membrane enables H < + > to selectively pass through and coexisting ions such as Na < + > and the like not to pass through, so that the ion selective membrane can be used for power generation in an acid-base neutralization reaction, chemical energy is converted into electric energy, water and a salt solution are respectively obtained in an acid chamber and an alkali chamber, and resources and energy are synchronously recycled.

The invention relates to the technical field of new energy storage, and discloses a thermoelectric energy storage battery, comprising: a sulfur gradient doped copper ferrocyanide positive electrode; a copper negative electrode; a thermal response type gradient concentration electrolyte; an asymmetric heat exchange layer; the photovoltaic panel material layer is deposited on the battery shell; a preparation method of a thermoelectric energy storage battery comprises the following steps: S1, coprecipitating a copper nitrate solution and a potassium ferricyanide solution at a flow rate of 0.1-0.3 ml / min at 4-6 DEG C to generate a nano precursor; and S2, in a mixed atmosphere of H2S and N2, annealing is performed at 250-320 DEG C, the volume fraction of H2S is linearly adjusted from 10% to 30% along with the temperature, and sulfur gradient doping is formed. By constructing a sulfur gradient doped copper ferrocyanide positive electrode structure, stable electrochemical response of the material in a thermally driven environment is realized, and the problems of non-uniform lattice expansion and low interface charge migration efficiency in a thermal field are solved.

This invention discloses a solar-driven integrated device for collecting freshwater and droplet energy, comprising: a photothermal evaporation mechanism including a seawater tank, a light-transmitting part disposed on the seawater tank, a middle-layer collection part disposed on the light-transmitting part, a high-layer collection part disposed on the light-transmitting part, a floating part disposed within the seawater tank, a flow guide part disposed on the seawater tank, and an isolation part disposed on the flow guide part; and a droplet power generation mechanism including a storage part disposed within the seawater tank, a protection part disposed within the storage part, a power generation part disposed on the protection part, and an adjustment part disposed on the light-transmitting part. This solar-driven integrated device for collecting freshwater and droplet energy combines a triboelectric nanogenerator with photothermal interfacial evaporation, enabling the simultaneous use of solar energy for seawater desalination and freshwater collection, while also collecting droplet energy, thus converting mechanical energy into electrical energy and improving energy utilization efficiency.

A power generation sensor includes: a housing body in which a module receiving a generated power is housed; a module with a first connector electrode disposed on a front face; a second connector electrode disposed on an inner face of the housing body connected to the first connector electrode; and a power generation electrode connected to the second connector electrode.

This invention discloses a self-powered, controllable, self-destructing microcapsule for monitoring intragastric pressure, belonging to the field of medical capsule technology. It aims to solve problems existing in current intragastric monitoring capsules, such as short power lifespan, uncontrollable gastric retention and expulsion, and bulky size and difficulty in swallowing due to modular design. The capsule includes a capsule shell, within which are sequentially arranged a retention unit, a circuit unit, and a primary battery unit. The retention unit ensures the capsule remains in the stomach, the circuit unit monitors intragastric pressure, and the primary battery unit supplies power to the circuit unit. This invention integrates self-powering, long battery life, controllable retention, and high miniaturization, providing a novel solution with significant clinical translational value for non-invasive, long-term, and safe monitoring of intragastric pressure.

The application discloses a kind of super-wetting regulation and control device and process of high-efficiency oil-water separation filter membrane, specifically relates to oil-water separation equipment technical field, including installation shell, the upper portion of the installation shell is provided with pretreatment module, the inner cavity middle part of the installation shell is provided with separation main body module, the inner cavity lower portion of the installation shell is provided with self-generating module, the lower portion of the outer surface of the installation shell is provided with battery, the upper portion of the battery is provided with electric heating regulation and control module fixedly installed on the outer surface of installation shell.The super-wetting regulation and control device of the high-efficiency oil-water separation filter membrane disclosed in the application can regulate the wettability of the separation membrane by changing the temperature of the separation membrane according to the separation requirements of oil-water mixture through the setting of electric heating regulation and control module and patterned super-amphiphobic / heat-responsive super-wetting droplet separation membrane, realize the efficient separation of different phase state oil-water, and improve the adaptability and separation efficiency of the device.

The invention relates to a passive driving microcapsule movement color development method, and belongs to the field of sensor detection. According to the method, sweat generated during movement of a human body drives a photovoltaic device to spontaneously generate electric potential, the electric potential directly acts on microcapsule dispersion liquid to drive directional movement of black and white particles in the microcapsule dispersion liquid, and visual color development response without an external power source is achieved. The method mainly comprises the steps of sweat induced power generation, particle electrophoresis driving and ion concentration associated color development. The problems that an existing sweat detection technology depends on an external power source, the equipment size is large, and real-time visual reading cannot be achieved are solved, and the device is mainly applied to the fields of real-time sweat electrolyte analysis in exercise physiological monitoring, autonomous color development change of wearable medical equipment, passive sensing display integrated systems based on ion concentration gradient and the like.

The application provides a double-feed reverse electrodialysis power generation system, which comprises a heat generation module, a working condition adjusting module and a concentration difference power generation module. The heat generation module converts heat energy into chemical potential energy between salt solutions with different concentrations. The working condition adjusting module adjusts the temperature, pressure, concentration and flow of the dilute solution and the concentrated solution according to the actual working condition. The concentration difference power generation module converts the chemical potential energy between the salt solutions into electric energy through a reverse electrodialysis process. The conversion from heat energy to electric energy is realized through the above three processes. The application has the advantages of simple and reliable structure, low control difficulty, low noise and high reliability.