615 results about "Nanogenerator" patented technology

The invention discloses a friction nano-generator capable of collecting fluid energy, a preparation method of the friction nano-generator and application of the friction nano-generator in heavy metal ion removal, and belongs to the technical field of nano-generators. The invention discloses a fluid energy collection friction nano-generator. The fluid energy collection friction nano-generator comprises a base, a plurality of supporting plates, stress turbine blades, a rotating shaft, a contact separation assembly and a sliding friction assembly. Through structural innovation and optimization, high voltage is realized by using a contact separation mode, and meanwhile, high current output is realized by considering an independent layer mode. The composite structure design improves the adaptability of the system, so that the system can keep efficient energy conversion in various working environments, and the limitation of unbalanced voltage and current output in the traditional design is overcome. The composite design not only breaks through the power bottleneck of the traditional TENG, but also provides a new idea for efficient energy capture in a more complex mechanical environment. Compared with the prior art, the electric output performance and the device operation are greatly improved.

A friction nanometer generator disclosed by the present invention comprises a collection unit, a conversion unit and an output unit, the collection unit comprises an input shaft and a base, the conversion unit comprises a roller and a fixed cylinder, the outer wall surface of the roller and the inner wall surface of the fixed cylinder are both provided with friction materials, and the polarities of the friction materials of the roller and the fixed cylinder are opposite; the output unit comprises an energy storage electrode layer and an output electrode layer. The input shaft drives the roller to rotate, the roller and the inner wall of the fixed cylinder rub and roll, and friction materials of the roller and the fixed cylinder have opposite polarities and rub to generate electric energy; the generated electric energy is injected into the energy storage electrode layer, the energy storage electrode layer transmits energy to the output electrode layer through electrostatic induction, and the output electrode layer generates current output. Friction resistance and material abrasion are reduced in a rolling contact mode, the energy storage electrode layer and the output electrode layer of the output unit are of a non-contact structure, a large number of charges are generated due to electrostatic induction, an efficient electric energy output system is formed, and the charge density and the output performance of the friction nanometer generator are effectively improved.

The floatable instantaneous generator comprises an outer layer in the form of a hemispherical floatable supporting bowl and an inner layer in the form of a liquid-solid triboelectric nano generator (ls TENG); the inner layer includes a fluorinated ethylene propylene (FEP) layer on an inner side of the bowl, a ring electrode on an upper surface of the FEP layer around a periphery thereof, a circular electrode on a bottom surface at a central portion of the FEP layer, and a droplet slidable on the upper surface of the FEP layer. When subjected to open sea waves, the bowl floats and tilts the ls TENG so as to slide droplets on the upper surface of the FEP, thereby creating and disconnecting contact between the ring electrode and the circular electrode and providing power to an electrical circuit connected between the ring electrode and the circular electrode.

The invention discloses a composite hydrophobic fiber membrane based on a friction nano-generator and a preparation method of the composite hydrophobic fiber membrane. The composite hydrophobic fiber membrane is composed of a polyvinylidene fluoride nanofiber membrane, boracite particles, hydrophobic nanoparticles and polyvinylidene fluoride microspheres. The boracite particles are embedded in fibers of the polyvinylidene fluoride nanofiber membrane, and the hydrophobic nanoparticles are uniformly attached to the polyvinylidene fluoride microspheres and the polyvinylidene fluoride nanofiber; the hydrophobic nano particles are titanium dioxide nano particles or zirconium dioxide nano particles. The preparation method comprises the following steps: dispersing boracite powder and polyvinylidene fluoride powder into N, N-dimethylformamide to prepare an electrostatic spinning solution; the preparation method comprises the following steps: dispersing hydrophobic nanoparticles and polyvinylidene fluoride powder into N, N-dimethylformamide to prepare an electrostatic spraying solution; the composite hydrophobic fiber membrane is prepared through synchronous electrostatic spinning and electrostatic spraying. The problem that a modified polyvinylidene fluoride fiber membrane friction nanometer generator is low in output electrical performance in a high-humidity environment can be solved.

The invention provides structures and synthesis of a class of piezoelectric monomers and COFs with fluorine-substituted side chains tethered on the peripheral position of an aromatic moiety (thus different functional side chains). The multi-fluoro groups on the mentioned piezoelectric COFs provide abundant piezoelectric active sites, which enable the application as the active layer for PENGs. The exemplary embodiments also provide a process for the fabrication of a piezoelectric COF and a process for the fabrication of the piezoelectric nanogenerator utilizing mentioned piezoelectric COF.

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 the technical field of vibration energy collection, in particular to a multi-mode composite friction nano-generator based on magnetic bistability. Comprising a rectangular shell, a rectangular sliding part is arranged in the rectangular shell, a vertical connecting plate body is arranged in the middle of the top of the interior of the rectangular shell and extends downwards into the rectangular sliding part, and an elastic reset assembly and a magnetic bistable mechanism are jointly arranged on the vertical connecting plate and the rectangular sliding part; contact separation type friction nanometer power generation units are arranged on the front end face and the rear end face of the rectangular sliding part and the corresponding inner wall face of the rectangular shell. Grid type sliding friction nanometer power generation units are arranged on the left side end face, the right side end face and the lower bottom face of the rectangular sliding part and the corresponding inner wall face of the rectangular shell. According to the invention, two modes of friction nano-generators and a magnetic bistable mechanism are integrated, so that the conversion efficiency of mechanical energy is remarkably improved; the defect of narrow frequency band of a traditional linear generator is overcome.

The invention provides a multi-stage siphon water level sensing device based on a friction nanometer generator, and aims to overcome the defect that an existing TENG water level sensing device is easily interfered by the environment. The device performs graded monitoring on the water level through a multi-stage siphon structure, and the higher the water level is, the more the triggered siphons are, so that the variable electric signal frequency is generated, and the water level height is accurately reflected. The siphon unit is composed of siphons arranged in an array mode, and each siphon is provided with a water inlet pipe, a water outlet pipe and an exhaust pipe. Through arrangement of a siphon starting position, different water level heights correspond to starting of different siphons. The outlet flow of the siphon unit is converged to the water turbine, the water turbine works through the TENG to generate an electric signal, and the frequency is related to the water level height. The device has the advantages of efficient energy collection, self-driving, durability and reliability, and can bring a major breakthrough to the field of water level monitoring.

The invention particularly relates to hierarchical porous conductive gel, a preparation method thereof and a friction nano-generator. Aiming at the defects of mechanical property and electric conductivity of the existing conductive gel material, the invention provides the conductive gel with a multi-stage pore structure, food-grade raw materials are adopted, and the multi-stage pore structure is realized through a freeze-drying method and an interactive embedding mode of gel with different densities; the moist environment of an internal ion solution can be kept for a long time, and good stability and flexibility are achieved. The invention also provides a friction nano-generator using the gel material as a conductive medium, and the friction nano-generator has good electrical properties and good application prospects when applied to wearable electronic equipment.

The invention belongs to the technical field of generator devices, and relates to a bionic snail gold spiral structure all-directional collection wave energy friction nano generator, which comprises a packaging shell, a spring, a bounce bin, a pendulum bob, SR-TENG and VF-TENG. The SR-TENG in the horizontal direction and the inelastic connecting rod are sealed in the bouncing bin through the attached pendulum bob, the upper portion of the bouncing bin is connected with the spring, and the VF-TENG in the vertical direction is connected and integrally sealed in the packaging shell. The bionic snail shell gold spiral line structure is high in space utilization rate and small in device size, compared with other multi-degree-of-freedom TENG, horizontal 360-degree all-directional wave energy collection is achieved, integrity is high, only two wires are needed for the inner layer and the outer layer of the horizontal structure, wiring is simple, the pendulum motion frequency is high, low-frequency energy can be collected, and the device is suitable for large-scale popularization and application. The curved surface soft contact friction structure effectively increases the contact area.

The invention discloses a gait sensing unit of a triboelectric nano generator based on liquid metal / PDMS porous sponge, and relates to the field of gait sensors, and the sensing unit with high porosity, flexibility and durability is prepared through a template method. A white granulated sugar template is adopted to construct a three-dimensional communicated porous structure, so that uniform dispersion of LM in a PDMS matrix is realized, and the technical problem that low density and high sensitivity of traditional TENG are difficult to consider at the same time is solved. The preparation method comprises the steps of mixing and stirring, template infiltration, curing molding, template dissolution and the like, flexible sensors with thousand secondary cycle stability can be produced in batches, and the flexible sensor is suitable for wearable health monitoring equipment.

The invention relates to the technical field of fluid pressure sensing, in particular to a triboelectric hemispherical composite film pressure sensing device and a control method thereof, and the device comprises a shell, a top gland and a sensing unit located in the shell. The sensing unit comprises an insulating cover plate, a composite film, an insulating ring cover, a transmission buffer block, an annular end cover and a hemispherical composite film from bottom to top. The composite film directly contacts with hydraulic oil, deforms under pressure and acts with the copper foil on the lower side of the transmission buffer block to generate a first electric signal; when the pressure is increased, the transmission buffer block is pushed to move upwards, so that the spherical copper foil on the upper side acts with the hemispherical composite film to generate a second electric signal. Self power supply is realized by utilizing a friction nanometer power generation principle, wide-range monitoring is realized through a double-layer sensing structure, and the sensor has the advantages of high sensitivity, good sealing performance, adaptability to complex hydraulic working conditions and the like in cooperation with a spherical surface contact design and a multi-sealing structure.

The invention discloses an oscillating hydrofoil type optimization long-time self-sustaining energy collection device and an energy collection method. The energy collecting device comprises a plurality of oscillating hydrofoil units which are arranged at intervals, and the oscillating hydrofoil units are distributed in an array mode. Each oscillating hydrofoil unit comprises a hydrofoil shell and a friction nano-generator, a plurality of friction nano-generators which are arranged in parallel along the chord length of the hydrofoil chord and cling to each other are arranged in the hydrofoil shell, and the size of each friction nano-generator changes along with the thickness of the hydrofoil shell; and the upper and lower cambered surfaces of each friction nano-generator are tangent to the inner wall of the hydrofoil shell. When the oscillating hydrofoil unit performs pitching or surging under the action of tidal current, the friction nano-generator in the oscillating hydrofoil unit captures mechanical energy in real time and generates power, a traditional oscillating hydrofoil energy conversion device is replaced, the structure is simpler, production is simpler and more convenient, cost is lower, and energy capturing efficiency and self-sustaining performance are improved.

The invention discloses a method for detecting miRNA-21 based on a paper base-friction power generation sensing chip of intelligent DNA hydrogel and application. The method comprises the following steps: preparing Pt-Ni NPs; the preparation method comprises the following steps: preparing hydrogel embedded with Pt-Ni NPs; designing a paper-based micro-fluidic chip; the miRNA-21 is recognized through a CRISPR-Cas12a system, the gel is cut, internal Pt-Ni NPs signal molecules are released, and a blue strip is displayed on the paper-based micro-fluidic chip; a nano generator is connected with the chip to prepare a paper base-friction power generation sensing chip; along with the change of the concentration of the miRNA-21, the gel releases Pt-Ni NPs with different concentrations to cause the voltage change on the paper-based friction power generation sensing chip, and the change value is in direct proportion to the concentration of the miRNA-21. The chip is used for detecting miRNA-21 and has the advantages of simplicity in operation, small size, portability, high sensitivity, good specificity and short detection period.

There is disclosed a hybrid system for generating free energy from dam-water by integrating giant turbines with piezoelectric nanogenerators and solar cells. This three-in-one generator harnesses electrical energy from solar and mechanical energy. Strategically positioned large-scale turbines convert the kinetic energy of water flow into electrical energy. Concurrently, integrated piezoelectric nanogenerators transform mechanical stress from turbine operations into electrical energy via the piezoelectric effect. These nanogenerators function as self-charging hybrid supercapacitors (SCHSCs), featuring activated carbon (AC) electrodes and PVA-KOH-BTO electrolyte. Solar panels utilizing dye-sensitized solar cells (DSSCs) with TiO2 photoanodes, molybdenum disulfide (MoS2) counter electrodes, an iodine-based electrolyte, and dyes enhance energy conversion efficiency under varying solar conditions. The system efficiently generates electricity even under low-flow conditions, minimal sunlight, or when turbines are not operating at full capacity.

There is provided a triboelectric nanogenerator which includes a negative electrode, a negative tribolayer, a positive tribolayer, and a positive electrode. The positive tribolayer and the positive electrode are made of the same material. The material is a surfactant-protected ionic conductive material.

The invention belongs to the technical field of friction nano-generators, and particularly relates to a friction nano-generator of a high-dielectric-constant material doped friction layer, which comprises a substrate, liquid metal, a friction layer, a bottom electrode and a top electrode, the liquid metal is arranged on the substrate, and the friction layer is arranged on the liquid metal; the bottom electrode is connected with liquid metal; the top electrode is connected with the friction layer; particularly, a high-dielectric-constant material is doped in the friction layer. The high dielectric constant material is doped in the friction layer, the polarization capability of the friction layer is improved through the high dielectric constant material, friction charges with higher density can be stored and maintained, charge leakage is reduced, instantaneous current generated by touching each time is higher, peak voltage is higher, and therefore stable high-power output is achieved.

The invention belongs to the technical field of intelligent electrochemical sensing and nano energy, and discloses a total current sensing system for identifying commercially available beverage components and a detection method. The method comprises the following steps: dropping a beverage to be detected onto the surface of a friction layer of a total-current nano-generator at a speed of 1-5 drops per second, and generating an electric signal due to a liquid-solid friction electrification effect; s2, the electric signals are collected in real time at the sampling rate of 1 kHz through a data collection module, and the signal processing flow comprises Z-score standardization, data enhancement and signal truncation so as to optimize time domain and frequency domain feature extraction. According to the method, the technical bottleneck that a traditional method depends on a professional instrument and the detection process is complex is solved through fusion of the total-current liquid drop nano-generator and deep learning, and an innovative scheme is provided for rapid on-site identification of commercially available beverage ingredients.

The invention relates to the technical field of monitoring, and discloses a monitoring method and a friction power generation type intelligent cushion, the method is applied to the friction power generation type intelligent cushion, the friction power generation type intelligent cushion comprises a plurality of arrays, each array comprises friction nano-generators, the friction nano-generators are connected in parallel with respective corresponding resistors and then connected with an ADC collector, and the ADC collector is connected with the friction nano-generators. The monitoring method comprises the following steps: acquiring a first voltage signal or a second voltage signal; determining a large-amplitude signal and a small-amplitude signal based on the first voltage signal and the second voltage signal; and performing action prediction based on the large-amplitude signal, the small-amplitude signal and a deep learning model. According to the invention, each friction nano-generator is connected in parallel with the corresponding resistor, the first voltage signal or the second voltage signal is utilized to analyze signals with different amplitudes, and the action corresponding to the signal is judged through the deep learning model, so that the monitoring effect of the friction nano-generator is improved.

The invention relates to the technical field of conductive materials, and discloses ECC concrete based on carbon black doping and a preparation method and application thereof.The preparation method includes the following steps that cement, slag, quartz sand, silica fume and limestone powder are subjected to dry mixing to obtain a dry material; dispersing carbon black and a dispersing agent in water to obtain carbon black dispersion liquid; and mixing the dry material, the carbon black dispersion liquid, a polycarboxylate superplasticizer and polyethylene fibers to obtain the carbon black doped concrete. The conductivity of the ECC concrete is improved through the carbon black, the ECC concrete is applied to the field of friction nano-generators, potential difference can be formed through extrusion of an automobile in the using process, and therefore current is output to supply power to traffic lights, monitoring equipment and the like.

The present invention discloses a method for preparing MXene / TPU conductive fiber, which belongs to the technical field of composite conductive fiber electrode preparation. x The PDA@MXene conductive ink obtained by surface modification of MXene nanosheets with dopamine hydrochloride is loaded onto the large-scale prepared MXene / TPU wet-spun conductive elastic fibers by dipping and coating to prepare PDA@MXene / TPU elastic fiber electrodes. The conductive properties of the composite fiber are used to develop structurally designable flexible self-powered sensing fabrics and fabric-based friction nanogenerators. The present invention solves the contradiction between high deformability, electrical properties and wearing comfort of flexible stretchable fiber electrodes; the surface modification of MXene by in-situ self-polymerization of dopamine solves the interface problem of MXene on the fiber surface, including but not limited to enhancing the adhesion properties between the conductive ink and the fiber and improving the electrical stability of the stretchable fiber electrode.

The invention discloses surface-modified self-repairing polyurethane, a friction nano-generator, a preparation method and application, and belongs to the technical field of material scientificity, and the preparation method of the surface-modified self-repairing polyurethane comprises the following steps: uniformly mixing a fluorine-containing group compound and hexamethylene diisocyanate, and carrying out heating reaction, extraction and drying to obtain the surface-modified self-repairing polyurethane. Mixing with serinol, dissolving in an organic solvent, heating for reaction, and drying to obtain a fluorine-containing group chain extender; and dissolving a quadruple hydrogen bond-containing chain extender and a fluorine-containing group chain extender in an organic solvent, adding the isocyanate-terminated polyurethane prepolymer, and carrying out stirring reaction, mold reversing and drying to obtain the surface-modified self-repairing polyurethane. The self-repairing polyurethane can effectively improve the environmental adaptability and the service life of the friction nanometer generator. The surface charge transfer efficiency is enhanced due to good conductivity, and the power generation performance is improved; meanwhile, the mechanical property is enhanced through hydrogen bond crosslinking, so that compared with traditional equipment, the environment universality is better.

The invention belongs to the technical field of intelligent sensing monitoring and micro-nano energy, and discloses an intelligent acid rain sensing monitoring method and system based on a total-current nano generator. The method comprises the following steps: preparing a total-current nano-generator as a sensing core element, and generating a characteristic electric signal corresponding to a pH value through the action with acid rain; constructing an intelligent algorithm processing module based on a ResNet 18-1D convolutional neural network (CNN), and performing multi-dimensional feature extraction and pH value intelligent classification on the collected electric signals; and displaying the electric signal waveform characteristics and the pH recognition result in real time through a visual interaction interface. According to the invention, the full-current nano generator is combined with the deep learning technology, the technical bottlenecks that a traditional acid rain detection method depends on a large professional instrument, needs external power supply support and is complex in operation process are broken through, and in-situ, rapid and intelligent monitoring of the acid rain pH value is realized. And an efficient and reliable solution is provided for real-time monitoring of acid rain in industrial areas and outdoor environments.

The invention discloses a triboelectric nano-generator and a preparation method and application thereof, and belongs to the technical field of nano-energy. The triboelectric nano-generator comprises an electrode layer, a charge storage layer and a friction layer, and the charge storage layer is located between the electrode layer and the friction layer; the charge storage layer is a nanofiber membrane containing polymer fibers, and a polymer is selected from one or more of polyimide, polyvinylidene fluoride, polydimethylsiloxane, polystyrene, polyethylene terephthalate and nylon. According to the triboelectric nano-generator and the preparation method and application thereof provided by the invention, charges can be stored to a higher degree, the neutralization of negative charges and positive charges induced by the electrodes is avoided, the charge retention capability of the friction layer is improved, and the output performance of the triboelectric nano-generator is improved.

The invention discloses a friction nano-generator based on silk fibroin composite aerogel, a preparation method and application of the friction nano-generator. Biomass SF serves as a matrix and is combined with high-conductivity MXene, an interface structure between the MXene and the SF is improved through sodium alginate (SA), and biomass conductive aerogel with high mechanical property and electrical property is constructed and serves as a positive friction material; the friction nano-generator, which is combined with a polydimethylsiloxane / barium titanate (PDMS / BaTiO3) composite film with high dielectric property as a negative friction material, has high frictional electricity output property and stability. According to the invention, three different types of friction nano-generators of a plane type, a folding type and a wave type are developed, and the wave type friction nano-generator has the most excellent high-friction electricity output property and stability.

The present invention discloses a gesture recognition sensor based on a triboelectric nanogenerator and a preparation method thereof, which relates to the technical field of gesture recognition and solves the technical problem of poor wearing comfort of the gesture recognition sensor. The key points of the technical solution are that the sensor includes an Ecoflex layer, a metal electrode layer, and an insulating support layer. Based on the principle of electrostatic induction and friction, the contact and separation of the back-of-hand skin and the sensor can generate electrical signals of a certain mode. The sensor can obtain multiple groups of different electrical signals generated by the deformation of the skin at different positions on the back of the hand through an array arrangement on the back of the hand. The electrical signals can accurately identify specific gestures after being processed and analyzed by machine learning. The application of the array arrangement method not only reduces the size of a single sensor and improves the wearing comfort, but also can obtain more motion signals from different positions, greatly improving the accuracy of gesture recognition.

The invention relates to a liquid identification method and system based on a triboelectrification-convolutional neural hybrid network, and belongs to the technical field of liquid identification, and the method comprises the following steps: continuously mixing a pulse gas flow with a to-be-detected liquid to form a gas-liquid two-phase flow, inputting the gas-liquid two-phase flow into a triboelectrification nanogenerator, and collecting a voltage signal at the same time; according to the method, liquid to be detected is fully sheared through pulse airflow, gas-liquid two-phase flow enters the friction nano-generator to be in high-frequency contact-separation with the friction nano-generator, and the friction nano-generator is subjected to high-frequency contact-separation with the gas-liquid two-phase flow, so that the high-frequency contact-separation between the gas-liquid two-phase flow and the friction nano-generator is realized. The friction nanometer generator generates stable and repeatable voltage signals with high spatial and temporal distribution characteristics, the voltage signals are collected and preprocessed to obtain time sequence data, then the time sequence data are input into a convolutional neural network and long and short term memory network mixed model, and therefore the category or concentration grade of liquid to be detected is accurately obtained.

The invention relates to a power transmission line vibration energy taking device based on piezoelectric-friction nanometer power generation effect synergy. The device is composed of a TENG module and a PEG module, the TENG module comprises at least two friction nanometer generators in a vertical contact-separation mode, friction material layers of the friction nanometer generators are FEP films and nylon films, and friction electrode layers are copper foil films; the PEG module is composed of a pair of piezoelectric arrays, each piezoelectric array comprises at least one piezoelectric vibrator in a cantilever beam mode, and a piezoelectric material is Sm-doped PMN-PT piezoelectric ceramic. And the two are connected through an elastic material to form an integral energy taking device, the working frequency range is 0.1-150Hz, and the main frequency of aeolian vibration of the power transmission line can be covered. The device can effectively collect the vibration energy of the power transmission line, provides stable electric energy for monitoring equipment, solves the problem that a traditional energy taking mode is greatly influenced by environmental factors, has the advantages of being compact in structure, high in energy conversion efficiency, high in adaptability and the like, can be widely applied to the field of power transmission line monitoring, and provides powerful support for intelligent power grid construction.

The invention discloses a triboelectric nano-generator prepared by spraying MXene on stretchable polyurethane fibers, a preparation method and an application of the triboelectric nano-generator. The triboelectric nano-generator is integrally of a layered coaxial linear structure and comprises a stretchable layer, a conductive layer, a triboelectric layer and a two-dimensional material layer from inside to outside. The stretchable layer is a polyurethane (PU) layer; the conductive layer is formed by tightly winding a silver wire or a silver-coated nylon wire on the stretchable layer; the triboelectric layer is a polyamide (PA) layer and is used for generating a triboelectric effect; the two-dimensional material layer is used for improving the electrical output performance. According to the method, the production of the triboelectric nano generator FM-TENG with the stretchable polyurethane fiber sprayed with the MXene is realized through a two-step weaving process; the prepared triboelectric nano generator FM-TENG has excellent mechanical performance, stable electrical performance and high customizability, and can be widely applied to the fields of human motion recognition, energy collection, self-powered sensing and the like.

The invention belongs to the technical field of friction power generation, and particularly relates to a microcrystalline cellulose triboelectric composite film, a preparation method thereof and a triboelectric nano-generator. Comprising the following steps: adding soluble trivalent iron salt into microcrystalline cellulose dispersion liquid, uniformly dispersing, and adding polyethyleneimine in a stirring state to form a dispersion system; adjusting the pH value of the dispersion system, adding a cross-linking agent for activation to obtain a mixture, carrying out a cross-linking reaction to cross-link microcrystalline cellulose and a liquid amine derivative, complexing with ferric ions to obtain a composite film precursor, and drying the composite film precursor to obtain the microcrystalline cellulose triboelectric composite film. According to the invention, microcrystalline cellulose is taken as a matrix, polyethyleneimine and microcrystalline cellulose are crosslinked and complexed with Fe < 3 + >, and a recyclable, biodegradable and biocompatible composite film is constructed, so that the triboelectricity output and humidity adaptability of the cellulose-based triboelectricity material are improved, and the energy efficiency of the material in a self-powered process in a high-humidity environment is enhanced.