125 results about "Ion intercalation" patented technology

The invention relates to the field of batteries, in particular to a long-circulation persistent adhesion type negative electrode composite electrode and a preparation method and application thereof. The long-circulation persistent adhesive type negative electrode composite electrode comprises a current collector, and a first adhesive layer, an active slurry coating and a second adhesive layer which are sequentially coated on two sides of the current collector, according to the invention, through the bonding effect between the second bonding layer and the diaphragm, the pole piece is uniformly stressed during cyclic expansion, the wrinkles of the pole piece are improved, the electrolyte infiltration is better in combination with the oil-absorbing conductive agent, the lithium ion transmission efficiency is improved, and the cycle life is prolonged; an interface structure formed by multi-layer coating can buffer lithium ion intercalation / deintercalation stress, so that the pole piece can still keep good binding power after circulation, and the cycle performance of the lithium ion battery can be effectively improved; the conductive agent contents of the first bonding layer, the active slurry coating and the second bonding layer are distributed in a concave gradient manner, so that the resistance is reduced, and the conductivity is enhanced.

The invention relates to the technical field of sodium-ion batteries, and discloses a super-crosslinked asphalt-based hard carbon material, a preparation method and application thereof, and a sodium-ion battery. Asphalt is subjected to super-crosslinking by adopting a mechanochemical method, and the asphalt, a crosslinking agent and a catalyst realize fracture and recombination of chemical bonds under the action of mechanical shearing force of grinding balls, so that the super-crosslinked asphalt-based hard carbon material is obtained. According to the present invention, the asphalt is subjected to segmented ball milling and super-crosslinking, and then carbonization sintering is performed, such that the asphalt cannot be subjected to molecular rearrangement so as to finally form the hard carbon material with the more suitable microporous structure and the more suitable interlayer spacing, such that the negative electrode ion embedding requirement of the sodium ion battery is met, the excellent sodium storage performance is represented, and the capacity and the first coulombic efficiency of the assembled battery are improved; the performance improvement of the sodium ion battery is integrally promoted. The method is low in energy consumption, short in time consumption, simple in parameter control and suitable for large-scale application and popularization.

The invention discloses a high-performance sodium ion battery negative electrode ZnS / CoS (at) C composite material and a preparation method thereof, the material preparation method has the characteristics of definite control parameter, easy purity control, simple operation, good process repeatability and the like, and the prepared sodium ion secondary battery negative electrode material has excellent sodium ion intercalation and deintercalation capability and can be used for preparing a sodium ion secondary battery negative electrode material. The specific capacity, the cycling stability, the coulombic efficiency and the rate capability of the sodium ion secondary battery can be effectively improved, the requirements of different conditions can be met, and the application prospect is wide.

The invention discloses a preparation method and application of an organic molecule metal ion double-intercalation vanadium-based oxide positive electrode material, and the method comprises the following steps: S1, adding 2, 5-hexanedione, aluminum chloride and a vanadium-based oxide into deionized water according to a preset molar ratio, and stirring to a uniform state; s2, continuously stirring the solution prepared in the step S1, controlling the stirring rate, and dropwise adding diluted hydrochloric acid to adjust the pH value to a target pH value; and S3, washing and drying the material prepared in the step S2 to obtain the organic molecule metal ion double-intercalation vanadium-based oxide positive electrode material. The vanadium-based oxide positive electrode material is optimized by applying an organic molecule metal ion double-intercalation strategy, the skeleton is greatly stabilized, the bonding mode of the vanadium-based oxide is optimized, more Zn < 2 + > ion intercalation active sites are provided, and the electrochemical performance of the material is improved. The prepared organic molecule metal ion double-intercalation vanadium-based oxide positive electrode material shows excellent cycling stability, relatively high specific capacity and excellent rate capability.

The invention relates to the field of graphene sensors, and particularly discloses a preparation method of a sweat-erosion-resistant laser-induced graphene sensor, which comprises the following steps: firstly, locally heating laser-induced graphene coated with heat release glue by using 1064 nm laser, so that the laser-induced graphene is stripped from an original polyimide substrate and transferred to a target thermoplastic polyurethane flexible substrate; then using 355 nm laser to ionize mixed gas of inert gas and oxygen, generating plasma to bombard an interface of laser-induced graphene and polyurethane, and inducing covalent bonding between surface functional groups; and then spraying a polydimethylsiloxane-urea / silicon dioxide fluoride composite solution on the surface of the laser-induced graphene-polyurethane composite structure subjected to transfer printing and bonding, and sintering by adopting 532 nm laser to form the self-repairing super-hydrophobic packaging layer with a micro-nano mastoid structure. The problem of ion intercalation in sweat is solved, and the electrical stability, the interface bonding strength and the wear resistance of the sensor are remarkably improved.

The invention discloses a multi-cavity mesoporous carbon nanosphere battery material and a preparation method and application thereof, and belongs to the technical field of ion batteries, the method comprises the following steps: mixing a cosolvent and a surfactant, and stirring until the cosolvent and the surfactant are dissolved; adding a carbon source monomer, and stirring until dissolving; adding a pore-foaming agent, and stirring to form a suspension; and finally, adding a hydrogen bond catalyst, and after the stirring reaction is finished, washing, freeze-drying and carbonizing to obtain the multi-cavity mesoporous carbon nanosphere battery material. The problems of poor micelle stability and low repeatability of a traditional soft template method are solved through cooperative regulation and control of catalysis of the hydrogen bond catalyst and precise assembly time. By simply controlling the reaction time, a product with the multi-cavity structure reaching 65.3%-92.5% is stably and repeatedly prepared and far exceeds 31.7% of that of a non-catalytic system, and precise customization of the microstructure of the material is achieved. The multi-cavity structure can better buffer the volume change caused by sodium ion intercalation / deintercalation in the charging and discharging process, and is beneficial to maintaining the structural integrity of the electrode material.

The present invention relates to a thermoelectric and hygroelectric power generation material based on a metal-phase molybdenum disulfide double-layer conductive fabric, a preparation method and an application thereof. Using metal-phase molybdenum disulfide as the base material, an ammonium ion intercalation hydrothermal method is used to in-situ grow a vertical array of 1T-phase molybdenum disulfide nanosheets on the surface of carbonized silk fibers to construct a p-type semiconductor, which provides abundant nano-channels for the efficient moisture absorption and flow of water, generating a high current density output; using a cotton fabric as the substrate, an n-type semiconductor is constructed by forming a 1T-phase molybdenum disulfide / titanium carbide van der Waals heterostructure on the surface of cotton fibers. The large specific surface area of the 1T-phase molybdenum disulfide / titanium carbide van der Waals heterostructure enables rapid electron migration. The present invention constructs a textile-based thermoelectric and hygroelectric generator through the orderly encapsulation of p-type 1T-phase molybdenum disulfide / carbonized silk, n-type 1T-phase molybdenum disulfide / titanium carbide-cotton fabric and aluminum electrodes, realizing the efficient collection and conversion of low-grade thermal energy and moisture energy, and can be applied to intelligent wearables, flexible sensing and energy conversion.

The utility model relates to a laminated core structure which comprises at least two negative pole pieces, at least one positive pole piece and at least one composite pole piece, the at least two negative pole pieces are sequentially arranged along the first direction; one positive pole piece is arranged between every two adjacent negative pole pieces, or one composite pole piece is arranged between every two adjacent negative pole pieces; the composite pole piece comprises a lithium piece and a polymer, and the high polymer coats the lithium sheet. In the laminated core structure, the lithium sheets can supplement lithium ions consumed by forming a solid electrolyte interface (SEI) film in the formation stage of the battery, so that the loss of active lithium is reduced, the initial coulombic efficiency of the battery is further improved, and the overall performance of the battery is enhanced; meanwhile, the polymer sheet also has a good elastic characteristic and can adapt to volume change caused by lithium ion intercalation and deintercalation in the charging and discharging process of the battery, so that the pressure on the shell is reduced, the deformation of the shell is effectively prevented, and the safety of the battery is improved.

According to the polyquinone diazacyclo organic positive electrode material and the preparation method thereof, the organic positive electrode material can be applied to lithium ion, sodium ion, potassium ion and multivalent ion batteries, the synthesis method is simple, and large-scale preparation can be realized. According to the organic positive electrode material, quinone is used as a redox unit, a dinitrogen heterocyclic ring is used as a connecting structure, the prepared polymer has proper flexibility, a proper space is provided for intercalation / deintercalation, and good cycle performance is shown in a multivalent ion battery. According to the preparation method, 2, 5-halogenated-1, 4-benzoquinone derivatives and diazacyclo derivatives are used as reaction raw materials to carry out condensation reaction. Experiments prove that by taking the poly (2, 3, 5, 6-tetrachloro-1, 4-benzoquinone-imidazoline) positive electrode material as an example, in the application of the zinc ion battery, the capacity retention ratio is 82% after 250 cycles under the current density of 0.1 A g <-1 >.

This application relates to a negative electrode material, and to a negative electrode, electrochemical apparatus, and electronic apparatus using the material. Specifically, this application provides a negative electrode material comprising graphite, wherein the I-stage lithium insertion platform potential P1 of the negative electrode material is 30mV to 75mV, and the II-stage lithium insertion platform potential P2 is 90mV to 110mV. By adopting the negative electrode material of this application, the cycle performance of electrochemical apparatus using it under high voltage and high temperature conditions can be significantly improved, the Coulomb capacity of the negative electrode material can be increased, and the initial efficiency of the negative electrode material can be achieved simultaneously.

The invention relates to the technical field of preparation of inorganic nano materials, and discloses a preparation method of a single-layer 1T-phase transition metal chalcogenide quantum sheet material, which mainly comprises the following steps: preparing a transition metal chalcogenide nano powder material by adopting a common hydrothermal or solvothermal method; the preparation method comprises the following steps: preparing a suspension of 1T-phase chalcogenide by a method of combining ion intercalation with liquid phase stripping; and carrying out centrifugal purification on the dispersion liquid obtained by stripping to obtain a suspension of the single-layer 1T-phase chalcogenide quantum sheet material, and further, carrying out cleaning, drying and other steps to obtain the single-layer 1T-phase chalcogenide quantum sheet powder material. The process is simple, the cost is low, the single-layer 1T-phase chalcogenide quantum sheet material can be efficiently prepared, the specific surface area of the product is high, the electrochemical activity is high, and a two-dimensional quantum sheet material with the characteristics of high activity, high specific surface area and the like can be provided for application of various energy storage and energy conversion devices such as supercapacitors, ion batteries, catalysis and the like.

A battery and an electric apparatus. The battery comprises a positive electrode sheet and a negative electrode sheet, wherein the positive electrode sheet comprises a positive electrode active material layer, the positive electrode active material layer comprising a positive electrode active material and a lithium-supplementing agent, and the content of nickel in 1 mol of the positive electrode active material being 0.8 mol to 1 mol; and the negative electrode sheet comprises a negative electrode active material layer, the negative electrode active material layer comprising a negative electrode active material, and the negative electrode active material comprising a silicon-based material. The present application can improve the capacity of the battery and reduce the resistance to the intercalation of active metal ions during charging, thereby improving the energy density and fast-charging performance of the battery.

This application discloses a method and apparatus for electrochemical extraction to obtain low-impurity lithium ions, relating to the field of capacitive deionization technology. The apparatus includes a positive current collector and a negative current collector with a working surface coated with mesoporous activated carbon material and a chemically de-intercalated lithium ion sieve. A lithium-ion-containing solution circulates between the working surfaces of the positive and negative current collectors. A voltage is applied to insert lithium ions into the chemically de-intercalated lithium ion sieve. After the power is turned off, the cations adsorbed by the mesoporous activated carbon material are re-desorbed. The resulting lithium-ion-intercalated sieve electrode is placed in an electrolyte solution and a voltage is applied to remove lithium. This application uses mesoporous activated carbon material as the negative electrode to adsorb impurity cations in the salt solution. The impurity cations are enriched on the surface of the activated carbon and do not accumulate on the surface of the ion sieve, hindering the absorption of lithium. + By placing the lithium ion extraction device closer to the chemical deintercalation sieve, the content of impurity cations intercalating into the sieve lattice can be reduced, thereby improving the lithium extraction efficiency and purity of the sieve.

The invention relates to a nanocrystalline O3 phase layered sodium ion battery positive electrode material, which comprises single crystal particle NaaNibFecMnd, 0.8 < = a < = 1.05, 0 < = b < = 0.33, 0 < = c < = 0.4, 0 < = d < = 0.4, b + c + d = 1, and a, b and c are not 0 at the same time. No grain boundary exists in the nanometer single crystal O3 phase layered sodium ion battery positive electrode material, and the problem of grain boundary cracking caused by anisotropic lattice change in the charging and discharging process of a similar polycrystalline material is solved. The nano single crystal O3 phase layered sodium ion battery positive electrode material provided by the invention has the characteristics of high specific surface area and high reaction activity, and can realize higher sodium ion intercalation and deintercalation quantity, thereby improving the specific capacity of the battery. Moreover, the nano single crystal O3 phase layered sodium ion battery positive electrode material can shorten the diffusion path of sodium ions and reduce the ion diffusion resistance, so that the material has good rate capability.

This invention discloses a superlattice structure all-solid-state thin-film battery cathode material, its preparation method, and its applications. The cathode material consists of a substrate and a stacked structure deposited on the substrate surface. The stacked structure is formed by alternating deposition of a first transition metal oxide layer and a second transition metal oxide layer from bottom to top. The first and second transition metal oxides of this invention have different work functions and lithium-ion intercalation potentials. An integrated electric field is induced through interface bandgap engineering, synergistically enhancing electron / ion transport dynamics. Simultaneously, lattice pinning and lattice pre-strain are used to suppress structural degradation during cycling. The cathode material provided by this invention exhibits high specific capacity, excellent rate performance, long cycle life, and low preparation temperature, is compatible with semiconductor processes, and is suitable for microelectronic integrated systems.

The application discloses a preparation method of a zinc-doped core-shell NiCo2O4 / NiCo-LDH three-dimensional heterostructure electrode material and application thereof. The preparation method of the electrode material is as follows: carbon paper is used as a substrate, NiCo2O4 nanowires are used as a core, zinc-doped NiCo-LDH nanosheets are used as a shell, a three-dimensional hierarchical core-shell structure is constructed, and a two-step hydrothermal method is adopted. The preparation method is simple in process, controllable in cost, and easy for large-scale production. The electrode material is applied to a sodium ion battery. Through zinc doping, oxygen vacancies are induced to be generated, an electronic structure is optimized, and a sodium ion embedding / extraction dynamic process is significantly accelerated. Excellent results are achieved in the application of the sodium ion battery, and a new strategy is provided for design and development of a high-performance sodium ion battery transition metal-based electrode material.

The invention discloses a preparation method and application of a heterostructure manganese-based positive electrode material, and the preparation method comprises the following steps: dissolving potassium permanganate and manganese sulfate monohydrate in deionized water, transferring into a reaction kettle after the potassium permanganate and the manganese sulfate monohydrate are completely dissolved, putting into a drying oven, and carrying out hydrothermal synthesis at certain time and temperature to obtain a precursor MnOOH material; after the reaction is completed, taking out the hydrothermal kettle after the hydrothermal kettle is cooled, carrying out centrifugal cleaning on a product for multiple times, then putting the product into a drying oven to be dried to obtain a precursor MnOOH material, then transferring the precursor material into a porcelain boat, putting the porcelain boat into a tubular furnace, and annealing at a certain temperature for a certain time to obtain the heterostructure manganese dioxide. Manganese dioxide prepared by the method is of alpha-type and beta-type manganese dioxide heterostructures (alpha / beta-MnO2) and is different from traditional single crystal type manganese dioxide, and the sample has more and more stable tunnel structures. According to the invention, the problems of low specific capacity and poor cycling stability caused by a small number of single crystal type beta-MnO2 ion intercalation and deintercalation channels and poor intercalation and deintercalation reversibility of alpha-MnO2 are solved.

The invention relates to the technical field of supercapacitor negative electrode materials, and discloses a preparation method and application of a high-capacity and high-magnification MXene electrode capable of rapidly eliminating active Ti-OH sites in a targeted manner. The preparation method comprises the following steps: adding an acid solution and a salt solution into a single / few-layer Ti3C2MXene aqueous dispersion, and heating and stirring in an air atmosphere to obtain a reaction mixed solution; carrying out centrifugal washing on the reaction mixed solution by using deionized water until the supernate is neutral; and collecting centrifugal precipitate, adding deionized water for ultrasonic dispersion to obtain an MXene aqueous dispersion liquid with active Ti-OH sites eliminated, and preparing a high-capacity and high-magnification MXene electrode by using the MXene aqueous dispersion liquid. According to the method, the single / few-layer Ti3C2MXene aqueous dispersion is stirred through air contact and moderate heating, and the ionic intercalation of the salt solution and the hydrolysis inhibition of the acid solution are matched, so that the high-activity Ti-OH sites are fully oxidized, hydrolyzed and removed, and the mass specific capacity, the rate capability and the cycle performance of MXene are improved.

The application provides a method for in-situ monitoring of active ion deintercalation in an active material. The method comprises: thinning a sample to be tested to below 150 nm by using a FIB technology to obtain a sample to be tested; determining an angle between a preferential orientation path of active ion intercalation and an electron beam by using an EBSD technology, and selecting a grain with an angle of 85°-95° as an in-situ monitoring object; transferring the active metal to a conductive microprobe, oxidizing part of the active metal on the conductive microprobe to form an active metal oxide, and obtaining a negative electrode and an electrolyte attached to the conductive microprobe; fixing the sample to be tested at a fixed end of a sample rod of an in-situ TEM tester, fixing the negative electrode and the electrolyte at a moving end thereof, and building a solid-state battery in a field of view of the tester; connecting the sample to be tested with a negative electrode of an external power supply, connecting the negative electrode with a positive electrode of the external power supply, applying a voltage to the solid-state battery, and collecting electron energy loss spectra at different positions in the grain of the active material to be tested.

The invention discloses tungsten oxide-based functional ink, a preparation method thereof, an electrochromic film and a device. The method comprises the following steps: adding deionized water into tungstic acid, and stirring; after stirring, adding sodium hydroxide and continuously stirring to obtain a precursor solution; adjusting the Ph value of the precursor solution to be 0.5-2; a precipitation product is separated from the precursor solution after the pH value is adjusted; carrying out microwave-assisted heating on the precipitation product to obtain tungsten oxide nanoparticles with a hexagonal crystal structure; and crushing the tungsten oxide nanoparticles, adding deionized water and isopropanol, stirring, and carrying out ultrasonic treatment to obtain the tungsten oxide-based functional ink. According to the tungsten oxide-based functional ink prepared by the method, the temperature of a film coating process can be remarkably reduced, excellent ion intercalation / deintercalation kinetics and stable electrochemical cycle performance of the tungsten oxide-based functional ink are ensured, and a feasible material and process path is provided for efficient, low-temperature and large-area manufacturing of an electrochromic device.

This invention belongs to the field of sodium-ion battery technology, specifically relating to a nitrogen-doped hard carbon material, its preparation method and application, a sodium-ion battery anode, and a sodium-ion battery. This invention uses aminophenol as a dopant, which introduces nitrogen (N) into the hard carbon material, increasing the interlayer spacing and facilitating sodium ion intercalation. Simultaneously, the introduction of N can regulate the defect structure of the hard carbon material, enriching sodium storage sites. Based on these reasons, the specific capacity and cycle performance of the final hard carbon material are improved.

The invention belongs to the technical field of battery electrode materials, and discloses a Prussian blue positive electrode material, a preparation method thereof and an application of the Prussian blue positive electrode material in a sodium ion battery, and the preparation method comprises the following steps: adding sodium pentacyanammoferrate and a complexing agent into water in proportion to obtain a solution I; preparing a ferrous salt solution to obtain a solution II; and slowly adding the solution II into the solution I to obtain turbid liquid, standing and aging the turbid liquid, carrying out solid-liquid separation, and washing and drying a solid product to obtain the Prussian blue positive electrode material. Fe < 2 + > and [Fe (CN) 5] < 3-> are connected in a five-coordinate manner in a nucleation process to generate cyano defects, and a strong field ligand-NH2 functional group is introduced. The introduced cyano vacancy reduces the coordination number of the low-spinning iron, promotes the spinning state of the low-spinning iron, promotes the spinning state of the low-spinning iron to be converted into a high / middle spinning state, and remarkably improves the reaction activity. The introduced-NH2 functional group is used for inhibiting the Jahn-Teller distortion; the flexible structure effectively relieves lattice stress caused by sodium ion intercalation / deintercalation, and the structural stability is enhanced.

This invention relates to the field of battery technology, and in particular to a graphite anode material, its preparation method, and a secondary battery. The graphite anode material of this invention comprises multiple secondary graphite particles, each secondary particle comprising multiple primary graphite particles. The surface of each primary graphite particle is coated with a hard carbon layer, and each primary graphite particle has at least one pore containing hard carbon. The preparation method of the graphite anode material includes the following steps: granulating and graphitizing a mixture containing raw material coke and a hard carbon precursor sequentially to obtain the graphite anode material. In the graphite anode material of this invention, the hard carbon not only coats the surface of the primary graphite particles, forming secondary particles, but also penetrates into the interior of the primary graphite particles. The high disordered structure of the hard carbon is more conducive to lithium-ion intercalation. This graphite anode material exhibits excellent rate performance, initial charge-discharge efficiency, and cycle performance.

The invention belongs to the technical field of anode catalysts, and particularly relates to a nano-porous anode catalyst with a carrier synergistic strengthening effect and a preparation method thereof.The preparation method comprises the following steps that precursors are compounded, specifically, Co (NO2) 2, PMMA microspheres (D50 = 0.7 + / -0.1 micron) and carbon nanofibers (the length-diameter ratio gt; the preparation method comprises the following steps: mixing the raw materials according to a mass ratio of 1: 0.3: 0.02, and carrying out ultrasonic dispersion (300W / 40kHz / 30min). According to the method, Ir < 3 + > ions are embedded into Co3O4 lattice oxygen vacancies (DFT (Discrete Fourier Transform) calculation embedding energe-2. 3eV) through atomic-scale interface regulation and control and mechanical force chemical action generated by ball milling.

This application relates to the field of energy storage technology, providing a battery cell and its preparation method, battery device, power consumption device, and energy storage device. The battery cell includes: a cell assembly comprising a negative electrode, a separator, and a positive electrode stacked together; a casing containing the cell assembly; and an electrolyte containing the electrolyte within the casing. The negative electrode comprises a negative electrode active material, which includes a modified graphite material having a core-shell structure. The core-shell structure includes a shell and a core located within the shell. The core comprises graphite and a buffer sheet located between at least some layers of the graphite. The lithium intercalation potential of the buffer sheet is greater than that of the graphite, and the lithium intercalation potential of the shell is greater than that of the buffer sheet. This application at least facilitates precise control of the lithium-ion intercalation process and interfacial reactions from the interior to the surface of the material.

The invention discloses a method for repairing attenuated battery capacity. The method comprises the following steps: S1, taking a battery of which the capacity retention ratio is reduced below the initial capacity as a target battery; s2, the target battery is placed at the environment temperature, a high-current charge-discharge cycle is applied for activation treatment, and the current density value of the high current is 2-10 times of the typical current density of the battery in the conventional or unconventional cycle; and S3, after completing the high-current charge-discharge cycle, adjusting the charge-discharge current of the battery to a standby level for later use. According to the method disclosed by the invention, the immediate releasable capacity of the battery can be remarkably recovered, and the ion embedding-stripping or deposition-stripping uniformity in the battery can be improved, so that the capacity retention ratio and the cycling stability of the battery in subsequent long-term cycling are improved.

The double-layer coated spherical composite material prepared by the invention has a unique three-dimensional network structure and element doping, can promote electrode-electrolyte contact, and improves electron transmission and lithium ion diffusion; the carbon coating layer and the oxygen-deficient metal oxide coating layer outside the hard carbon substrate have a certain synergistic effect on the capacity and the capacity retention ratio of the composite material, the carbon coating layer inhibits volume expansion of silicon, and the oxygen-deficient metal oxide coating layer can serve as a buffer layer to bear stress generated by the volume expansion of the silicon and prevent silicon particles from being broken and pulverized, so that the capacity retention ratio of the composite material is improved. The material structure integrity is kept; in addition, the carbon coating layer is used as a conductive buffer matrix and can be combined with the complete oxygen-deficient metal oxide coating layer on the outer layer, so that the aggregation of the silicon nanoparticles in the charging / discharging process is effectively avoided; furthermore, the oxygen-deficient metal oxide coating layer can improve the incompleteness of the interface of a single carbon coating layer, reduce defect sites and accelerate the lithium ion embedding / de-embedding speed at the same time. The hard carbon substrate synthesized by the resin matrix has the characteristics of excellent material consistency, easiness in regulation and control of pore diameter, good deposition uniformity of nano silicon and the like.

The invention relates to the field of organic electrochemical transistors (OECT), in particular to a modified organic semiconductor material, a composite film, a preparation method, application and an organic electrochemical transistor, and the preparation method of the modified organic semiconductor material comprises the following steps: carrying out gradient thermal polymerization modification treatment on a semiconductor polymer material and a modifier in a formula 1 (1), the modified organic semiconductor material is prepared; the gradient thermal polymerization modification treatment comprises a low-temperature heat preservation polymerization process and a high-temperature heat preservation polymerization process; wherein the temperature in the low-temperature heat preservation polymerization process is 100-150 DEG C; the temperature in the high-temperature insulation polymerization process is 200-280 DEG C. According to the material prepared by the method and the constructed film, the optimal balance is achieved between the mechanical flexibility and the volume stability, the Young modulus is remarkably reduced, and swelling and stress concentration caused by ion embedding are effectively relieved; therefore, the operation stability and the service life of the organic electrochemical transistor in long-time electrochemical circulation and air environment are remarkably improved, and meanwhile, the basic electrical performance of a device is not influenced.

This invention relates to a pre-sodium-modified material mediated by layered transition metal oxides and its applications; the pre-sodium-modified material is obtained by mixing layered transition metal oxides and a sodium precursor, followed by high-temperature calcination or high-energy ball milling; wherein the chemical formula of the layered transition metal oxide material is AM. x O y A is Li + Na + or K + M is at least one of the transition metal ions from +2 to +7, 0 < x ≤ 5, 2 ≤ y ≤ 4; By using the method of the present invention, in order to address the problem of slow kinetics of traditional sodium carbonate pre-sodiumization agents, the present invention proposes to use layered oxides as cation intercalation mediators. By constructing a low-energy-barrier topological intercalation pathway and a cyclic mediating mechanism, the bulk phase transport resistance is reduced and high-quality capacity release is achieved, providing a low-cost, long-life in-situ pre-sodiumization scheme for sodium ion electrochemical energy storage devices.

The application discloses a kind of electric field induction-iron ion embedding type iron sodium phaeophytin preparation method and device.The method includes plant raw material slurry, pulse electric field wall breaking extraction, saponification forms chlorophyllin precursor liquid, using three-cavity membrane separation electric field reactor carries out bipolar membrane in-situ demag, iron anode electrochemistry releases iron and migrates to central coordination reaction cavity by cation exchange membrane, completes embedding iron under the control of pulse electric field and oxidation-reduction potential, then is salted by sodium, microfiltration, ultrafiltration, electrodialysis desalination and drying to obtain iron sodium phaeophytin product.The device includes raw material slurry module, pulse electric field processing module, saponification reaction module, membrane separation electric field reaction module, salted by sodium module, purification module, drying module and central controller.The application process is continuous, iron supply is controllable, demag and embedding iron are closely coupled, and is suitable for industrial implementation.