201results about How to "Excellent electrochromic performance" patented technology

The invention provides a tungsten trioxide / polyaniline core-shell nanowire array radiochromic film and a preparation method thereof. The preparation method comprises the following steps: dissolving white tungstic acid in aqueous hydrogen peroxide liquor to prepare peroxide tungstate liquor; coating the peroxide tungstate liquor on an electric conductive face of a clean electric conductive substrate; dissolving tungstate in alcohol to form precursor liquor, fixing the electric conductive substrate in a reaction kettle, adding the precursor liquor into the reaction kettle, carrying out a reaction at 150-250 DEG C for 8-16 hours, and taking out and carrying out thermal treatment at 300-450 DEG C for 1-3 hours to obtain a tungsten trioxide nanowire array; and mixing aniline and dilute sulphuric acid to form electrolyte for preparing polyaniline and carrying out electro-polymerization on polyaniline to obtain the tungsten trioxide / polyaniline core-shell nanowire array radiochromic film. The preparation process is convenient to control, lower in preparation cost and easy to realize industrialization. The film has the advantages of large spectrum adjustment range, abundant radiochromic types, high coloring efficiency, fast response speed, long cycle life and the like.

The invention discloses a nanocrystalline enhanced tungsten oxide electrochromic film which is a 'TCO nanocrystalline-WO3 amorphous' biphase composite film prepared by taking transparent conductive oxide (TCO) nanocrystalline and amorphous tungsten oxide as substrates. The invention further discloses a preparation method of the nanocrystalline enhanced tungsten oxide electrochromic film. The nanocrystalline enhancing technology is adopted to improve the electrochromic performance of a traditional tungsten oxide film at the visible light waveband, meanwhile, by virtue of the modulating characteristic of the TCO nanocrystallines at the near infrared waveband, modulation of the tungsten oxide film at the near infrared waveband is realized, and accordingly, the problems in the prior art that the tungsten oxide film is not long enough in cycle life and is low in electrochromic response rate of big-sized materials and lack of near infrared modulation capability are solved.

The invention relates to a preparation method of a self-assembly Ni-MOFs electrochromic QR code device. The method comprises the steps as follows: 1,4,5,8-naphthalenetetracarboxylic dianhydride and 5-amino-2-hydroxybenzoic acid are put in toluene, and an anhydride ligand is obtained; the ligand is dissolved in DMF and a solution A is obtained; nickel salt is dissolved in ethanol and a solution B is obtained; pretreated FTO glass is irradiated by ultraviolet ozone, the obtained FTO glass is sequentially placed in the solution A, ethanol, the solution B and ethanol for self-assembly, circulatingoperation is performed, and an FTO electrode with a Ni-MOFs film attached on the surface is obtained; a working electrode displaying QR code patterns is formed through laser etching, another FTO glass is used as a counter electrode, gel electrolyte is injected, and the device is obtained after packaging. Controllable preparation of the Ni-MOFs film is realized, the prepared QR code device can beswitched between display and hiding when positive and negative voltage is applied, and meanwhile, the device has good electrochromic performance and has wide application prospects in the fields of Internet of Things, intelligent wearable devices and the like.

The invention relates to a method for preparing a WO3 film, comprising the following concrete steps of: (1) dissolving a tungsten powder in hydrogen peroxide in water bath to prepare a solution X, and reacting in water bath at room temperature for 3-4 h, wherein the ratio of the tungsten powder to hydrogen peroxide is (10-25 g) to (100 ml); (2) stirring the solution X to react at the temperature of 51-55 DEG C for 25-30 min, and filtering; (3) adding anhydrous ethanol into the solution X with the ratio of hydrogen peroxide to anhydrous ethanol being 2: 0.9-1.1, stirring for reaction at the temperature of 75-85 DEG C for 28-30 min, and allowing an orange transparent sol to stand for 4-5 hours; (4) dipping a cleaned ITO or FTO glass substrate in the sol for 100-140s, and pulling for film forming at the speed of 4.5-5 cm / min; and (5) drying the obtained substrate at the temperature of 75-85 DEG C for 20-30 min, and annealing at the temperature of 180-220 DEG C for 50-70 min so as to obtain the WO3 film. The WO3 film prepared by the method has advantages of good electrochromic property, good cycle stability and smooth and compact surface.

The invention discloses an electrochromic device and making method with polyaniline-polyvinyl alcohol composite film, which is characterized by the following: changing the property of polyaniline-polyvinyl alcohol composite film due to changing the monomer density and kind of doping acid; displaying excellent dynamical property and adhesive property and electric activity; reducing the response time; inversing the change between colorless and purple in the extra voltage action; possessing longer circulation lifetime. The invention can be change into colorless, yellow, green, blue and purple with the penetration variation rate arranged from 38 to 75 percent at 600 nm, whose circulation lifetime reaches 1327 times.

The present invention relates to an electmpolymerization method for preparing a nanotube-type conducting polymer using a porous template, a method for preparing an electrochomic device using electrochromism of the conducting polymer, and an electrochromic device prepared therefrom, and more particularly to an electropolymerization method for preparing a nanotube-type conducting polymer using a porous template to prepare an electrochromic device having good electrochromism by injecting an electrolyte solution wherein a precursor of the electrochromic conducting polymer is dissolved into an electrochemical reaction cell comprising a first transparent electrode and a working electrode, which is a porous template on the electrode, a method for preparing an electrochromic device using electrochromism of the conducting polymer, and an electrochromic device prepared therefrom.

The invention provides a poly (3,4-ethylenedioxythiophene) nanowire thin film. The poly (3,4-ethylenedioxythiophene) nanowire thin film is prepared according to the following synthetic method that in a three-electrode electrolytic cell, a mixed solution of 3,4-ethylenedioxythiophene monomer, a supporting electrolyte and an electrolytic solvent serves as an electrolyte solution, a gold electrode, a platinum electrode and an indium tin oxide conductive glass electrode or a fluorine-doping tin oxide conductive glass electrode serves as a working electrode, the gold electrode or the platinum electrode serves as an auxiliary electrode, a silver / silver chloride electrode serves as a reference electrode, polymerization reaction is conducted through a cyclic voltammetry or a potentiostatic method at the room temperature, and thus the poly (3,4-ethylenedioxythiophene) nanowire thin film deposited on the working electrode is obtained, so that a finished product is obtained after post-processing leaching and drying are conducted. According to the poly (3,4-ethylenedioxythiophene) nanowire thin film, the preparation method is simple and convenient, the reaction condition is mild, the product purity is high, and the prepared polymer thin film has an electrochromic performance and can be used as an electrochromic material to be applied to an electrochromic device.

The invention provides a triphenylamine self-powered electrochromic material, namely a compound (4-((4-(N, N-dimethylamine)phenyl)(phenyl)amino)benzyl)phosphonic acid and a synthesis method thereof. The invention also provides a self-powered electrochromic device containing the triphenylamine derivative. The novel triphenylamine derivative electrochromic material provided by the invention has double performance of photoelectric conversion and electrochromism; and the device consisting of the compound can realize the self-powering feature, namely that the device absorbs light energy and converts the light energy into electric energy for driving the device to change color. The novel device is simple in structure, low in preparation cost, green and environment-friendly and the like, and can be applied to the fields of buildings, automobiles, displays and the like.

The invention specifically relates to an electrochromic material based on a metal nanoparticle and an electrochromic device, belonging to the field of electrochromic materials and devices. The electrochromic material based on the metal nanoparticle comprises 0.01 to 1 wt% of the metal nanoparticle and 80 to 99 wt% of an ionic liquid electrolyte, wherein the metal nanoparticle is 100 wt% of metal nano-silver or a mixed nanoparticle of 10 to 90 wt% of metal silver and other metal. According to the invention, the silver nanoparticle is directly prepared in ionic liquid, the surface of the prepared nanoparticle is positively charged, and the ionic liquid is used both as a protective agent for the silver nanoparticle and as the electrolyte; so addition of needless stabilizing agent and electrolyte is avoided; thus, the preparation of the whole electrochromic material is greatly simplified, stability of metallic silver is improved, and the whole electrochromic performance is greatly improved. The electrochromic material and the electrochromic device are substantially innovative and have potential commercial advantages.

The present invention relates to an electropolymerization method for preparing a nanotube-type conducting polymer using a porous template, a method for preparing an electrochromic device using electrochromism of the conducting polymer, and an electrochromic device prepared therefrom, and more particularly to an electropolymerization method for preparing a nanotube-type conducting polymer using a porous template to prepare an electrochromic device having good electrochromism by injecting an electrolyte solution wherein a precursor of the electrochromic conducting polymer is dissolved into an electrochemical reaction cell comprising a first transparent electrode and a working electrode, which is a porous template on the electrode, a method for preparing an electrochromic device using electrochromism of the conducting polymer, and an electrochromic device prepared therefrom.

The invention relates to a preparation method of an electrochromic intelligent fiber. The preparation method of the electrochromic intelligent fiber comprises the following steps: dissolving 3,4-ethylenedioxythiophene in lithium perchlorate propylene carbonate solution to obtain a deposition solution, then vertically placing a stainless steel fiber subjected to ultrasonic washing into the deposition solution for carrying out electrolytic deposition, performing vacuum drying, so that the stainless steel fiber coated with poly(3,4-ethylenedioxythiophene) (PEDOT) is obtained; dipping gel electrolyte on the stainless steel fibers coated with PEDOT, drying at room temperature, then winding another stainless steel fiber on the stainless steel fiber dipped with the gel electrolyte, dipping the gel electrolyte again, and drying at room temperature, so that the electrochromic intelligent fiber is obtained. The preparation method of the electrochromic intelligent fiber is simple, low in cost and applicable to large-scale production; the prepared electrochromic intelligent fiber has good optical property, high transformation speed, good flexibility and obvious gradient effect.

The invention discloses a flexible electrochromic device and a preparation method thereof, and belongs to the technical field of electrochromism. The flexible electrochromic device is composed of twolayers of flexible transparent conductive electrodes and electrochromic gel attached between the two layers of conductive electrodes. The preparation method of the flexible electrochromic device comprises preparation of the electrochromic gel and preparation of the flexible electrochromic device. According to the invention, the electrochromic layer is compounded with an electrolyte layer to prepare the electrochromic gel, so that the structure of the electrochromic device is effectively simplified, the manufacturing cost is reduced, the ion transmission is facilitated, and the electrochromic performance is improved. In addition, a device prepared on the basis of the electrochromic gel material has the characteristics of flexibility, stretchability and the like.

The invention provides an eLectrochromic fiLm with aLkaLi responsiveness and a preparation method and appLication thereof. The eLectrochromic fiLm with the aLkaLi responsiveness comprises an eLectrochromic Layer, and the eLectrochromic Layer comprises, by weight, 25-60 parts of poLymethyL methacryLate, 15-25 parts of aLkaLi-responsive dye, 15-30 parts of pLasticizer and 10-25 parts of eLectroLyte,wherein the aLkaLi-responsive dye is a combination of an eLectro-aLkaLi and an aLkaLi-responsive materiaL. The eLectrochromic fiLm with the aLkaLi responsiveness has eLectrochromic properties, the eLectrochromic response time is as short as 0.01-10 seconds, and the coLor stabiLization time is Long.

The invention discloses a method for preparing WO3 electrochromic film by potentiodynamic electrochemical deposition, and belongs to the technical field of functional materials. The method comprises the following steps: adding an appropriate amount of tungsten powder into hydrogen peroxide for completely dissolving to prepare a peroxotungstic acid solution; adding an appropriate amount of ethanol and acetic acid to be stirred fully to obtain a stable mixed solution. The peroxotungstic acid solution prepared in the invention is relatively stable and can be placed for one month at normal temperature for continuous use; the method for preparing the WO3 film by potentiodynamic electrochemical deposition is low in cost, simple in process, free from annealing, uniform in film formation, and high in repeatability; the prepared film has excellent electrochromic and optical properties, thereby providing a new idea for development and industrialized production of an energy-conversing and efficient low-cost WO3 film technology.

The invention discloses a preparation method of a conductive polymer film having an inverse opal structure. The preparation method comprises that an electrochemical polymerization reaction occurs based on polymeric microspheres (comprising polystyrene microspheres or amino-polystyrene microspheres) as templates, and then the conductive polymer film having an inverse opal structure is obtained by impurity removal treatment and polymeric microsphere removal treatment. The preparation method has simple processes, utilizes the polymeric microspheres as hard templates, and can be carried out at a room temperature without harsh reaction conditions. The prepared conductive polymer film having an inverse opal structure has tidy morphology and good structural environment stability.

The invention discloses preparation of porous quasi-solidus electrochromism PVB electrolyte membrane with electrostatic spinning method and a preparing technology thereof. The electrolyte membrane is characterized in that the thickness of the porous quasi-solidus electrochromism PVB electrolyte membrane is 0.2-15 micrometers; the light transmittance of non-conductive transparent film is 65-97% when the length of light waves is 550 nm; the thickness of a transparent conductive layer is 0.05-400 nm. The PVB electrolyte membrane has a porous structure which facilitates ion transport, the efficiency of 'complexing'-'decomplexing' lithium ions on a macromolecule chain segment is improved, which greatly reduces the encapsulating difficulty, the fluid content of the porous quasi-solidus electrochromism PVB electrolyte membrane prepared from electrostatic spinning is ultralow, which reduces the encapsulating difficulty; the light modulation amplitude and the coloration efficiency are high, which reduces the encapsulating difficulty and makes the electrolyte membrane extensively applied to practice of an electrochromism glass industrialization technology.

The invention relates to the technical field of functional materials and devices, in particular to a multimode electrochromic device and a preparation method thereof. According to the preparation method of the multimode electrochromic device, dipping lifting is adopted so that a metallic oxide nano-particle film can be formed on a conducting surface of a transparent conducting substrate more uniformly and reversible transition among a mirror surface state, a transparent state and a black state of the electrochromic device can be realized, and controllability is high. The multimode electrochromic device is prepared through the preparation method. The multimode electrochromic device and the preparation method thereof have the advantages that reversible transition among the mirror surface state, the transparent state and the black state can be realized, and controllability is high.

The invention provides a preparing method of a silver-doped vanadium pentoxide nanowire. The method comprises the following steps that a vanadium source, a template agent, water, nitric acid and silver nitrate are mixed to obtain a mixture precursor; and the mixture precursor is subject to the hydrothermal reaction to obtain the silver-doped vanadium pentoxide nanowire. The invention further provides a preparing method of an electrochromic device. The method comprises the following steps that A, a solution of the silver-doped vanadium pentoxide nanowire is plated on the surface of conductive glass, and conductive glass with the surface plated with a silver-doped vanadium pentoxide nanowire film is obtained; and B, the conductive glass obtained in the step A and the other conductive glass are bonded through a sealing strip, an electrolyte is injected into the position between the two pieces of conductive glass, and the electrochromic device is obtained. Through silver doping, the conductive performance and the interlayer spacing of vanadium pentoxide are improved through silver doping, the silver-doped vanadium pentoxide nanowire with the high length-width ratio is formed, and therefore the electrochromic performance of the material is improved.

The invention discloses an aniline oligomer derivative with electrochromic property and a preparation method thereof. A class A electrochromic material obtained by the method is a linear aniline oligomer derivative with aniline oligomer in the middle and amino and carboxyl groups respectively at two ends, and the class A electrochromic material is obtained by reacting dicarboxylic anhydride with an aniline oligomer. A class B electrochromic material is a three-arm star-type aniline oligomer derivative and is prepared by reacting a triphenylamine homolog as a intermediate with the a class A linear aniline oligomer derivative; a class C electrochromic material is a three-arm star-type block aniline oligomer derivative prepared by introducing a polyethylene glycol ether chain into the obtained class B three-arm star-type aniline oligomer derivatives, and is a block copolymer with an electrochromic hard segment and an ionic conduction soft segment. The obtained class C three-arm star-type block aniline oligomer derivative also has outstanding characteristics of electrochromic and ion conduction functions, and can solve the problem of microphase separation of an electrochromic layer and ionic conductor layer of a conventional electrochromic device.

The invention discloses fluorescent viologen derivatives, application and a preparation method thereof. A series of novel viologen derivatives with fast and visual solvent recognition and fast and sensitive color-change detection for the pH value at the alkaline range, the temperature and alkaline gases such as NH3 are prepared by utilizing a solvothermal method. Simultaneously, the series of fluorescent viologen derivatives are simple in synthesis method, high in yield, low in cost and strong in fluorescence. A viologen electrochromic device is good in color-change property and cyclic stability, low in color-change voltage, fast in color change and convenient in assembly. The fluorescent viologen derivatives can display the distinguished colors and the fluorescence emitting change in different organic solvents, so that the effect of detecting and distinguishing the organic solvents is achieved; after the novel viologen is used for preparing into test paper for detection, the detectioncapability in a solution state is retained, and the test paper can display different color changes so as to achieve the effect of sensing detection and recognition. The test of the viologen electrochromic device shows that the fluorescent viologen derivatives have good potential application value in the fields of electrochromic glass and displays and the like.

The invention discloses a bistable electrofluorochromatic polymer material, a preparation method and applications thereof, wherein the bistable electrofluorochromatic polymer material has a structurerepresented by a formula I, and is obtained by polymerizing a monomer with a structure represented by a formula II. The preparation method comprises the step of directly carrying out in-situ polymerization on the surface of a conductive substrate by adopting an electrochemical method to form a film, ie., the electrofluorochromatic polymer material. The preparation method is simple and efficient, and the obtained polymer film has excellent electrofluorochromatic performance, good fluorescence reversibility, high contrast ratio, short response time and stable performance, can be used in the fields of optical display, intelligent discoloration windows, camouflage materials and the like, also has bistable electrofluorochromatic performance, can still keep display for a long time after power failure, is an efficient and energy-saving material, and can be used for long-acting display devices such as electronic tags, advertisement screens and the like.

The invention belongs to the technical field of electrochromic devices. The invention discloses an electrochromic device with an asymmetric electrode structure, a preparation method thereof and application thereof. The preparation method comprises the following steps of taking acrylamide as a monomer, N, N-dimethyl bisacrylamide as a cross-linking agent, ammonium persulfate as a thermal initiator,tetramethylethylenediamine as a catalyst and sodium chloride as an electrolyte to prepare ionic conductive polyacrylamide hydrogel as an ionic conductive layer; depositing a uniform cathodic discoloration film on a transparent ITO electrode to serve as an electrochromic functional layer, and uniformly placing the conductive hydrogel on the electrochromic functional layer; and placing an electrochemical substance which is easy to oxidize or metal ions which are easy to oxidize on an edge of the conductive layer, and performing packaging with a preservative film to obtain the electrochromic device based on the asymmetric electrode structure. According to the invention, the device with excellent properties is prepared. The device is simple in structure, a complex packaging process is omitted, and the electrochromic property is excellent.

The invention relates to a triphenylamine containing isoindigo polymer, a preparation method of the triphenylamine containing isoindigo polymer, and an application of the triphenylamine containing isoindigo polymer to electrochromism, and relates to an isoindigo polymer and a preparation method and an application of the isoindigo polymer. The invention aims at solving the problem of relatively narrow application range of isoindigo caused by the low solubleness of the isoindigo in an organic solvent. The structural formula of the triphenylamine containing isoindigo polymer is shown in the description, wherein n in the formula is a positive integer. The preparation method is as follows: 1, synthesizing N<1>,N<1>-bi(4-bromobenzene group)-N<4>,N<4>-diphenylbenzene-1,4-diamine monomer; 2, preparing an isoindigo derivative; 3, preparing the triphenylamine containing isoindigo polymer. The invention discloses the application of the triphenylamine containing isoindigo polymer to electrochromism as an electrochromic layer in an electrochromic device. The polymer has the electrochromic property and the memory property, can be applied to the electrochromism field, and is excellent in explosive detection and photoelectric detection. The triphenylamine containing isoindigo polymer is suitable for preparing the isoindigo polymer and the application of the isoindigo polymer.

The invention discloses a MoO3@PEDOT composite material, a preparation method and applications thereof, wherein the MoO3@PEDOT composite material comprises a MoO3 nanobelt and PEDOT coating the surface of the MoO3 nanobelt. The preparation method comprises the following steps: synthesizing a MoO3 nanobelt, and then polymerizing PEDOT on the surface of the MoO3 nanobelt by adopting an in-situ chemical oxidation reduction method to obtain the MoO3@PEDOT composite material with a coaxial nanobelt structure. The application of the composite material in the field of electrochromism is that a MoO3@PEDOT compound suspension is prepared, then MoO3@PEDOT composite films with different thicknesses are prepared by utilizing a film forming method, and the electrochromism performances of the MoO3@PEDOTcomposite films are researched. According to the material, the compounding of organic and inorganic electrochromic materials on a micro-nano level is realized, and a convenient channel can be provided for ion or electron transmission by utilizing the orderliness of a one-dimensional nanobelt, so that a film prepared from the material has good electrochromic performance, and has wide application prospects in the fields of intelligent windows, anti-glare glasses and the like.

The invention belongs to the fields of chemical engineering and materials, and particularly relates to the field of the electrochromic material, in particular to a Prussian blue composite photonic crystal (composite membrane) and a preparing method and application thereof. More specifically, an inorganic electrochromic material SiO2 composite photonic crystal is provided. Preferably, the inorganic electrochromic material is Prussian blue. The composite photonic crystal has high electrochromism performance.

The invention discloses a preparation method for a nanocrystal-doped tungsten oxide electrochromic film pattern. The preparation method comprises the following concrete steps: preparing a photosensitive FTO-doped tungsten oxide sol; coating an FTO electro-conductive glass substrate with the sol so as to prepare an FTO-doped tungsten oxide sol film with an ultraviolet light-sensitive characteristic; subjecting the sol film to exposure and development so as to obtain an FTO-doped tungsten oxide sol film with a pattern; and putting the sol film with the pattern into an atmosphere furnace for heat treatment so as to obtain the nanocrystal-doped tungsten oxide electrochromic film pattern. The preparation method is simple and can prepare the FTO nanocrystal-doped tungsten oxide electrochromic film pattern with a large area without special vacuum environment and reaction chamber; resists and corrosive mediums are not needed in the preparation process, so no damage is posed to the substrate; and an electrochromic film with visible-near infrared double-frequency modulation can be prepared and has better electrochromic performance compared with a common amorphous tungsten oxide film.

The invention relates to an electrochromism structure and a forming method thereof. The electrochromism structure includes a substrate; a first conductive layer positioned on at least one of a firs surface and a second surface of the substrate; a color changing function layer positioned on a surface of the first conductive layer; a second conductive layer positioned on a surface of the color changing function layer, wherein the second conductive layer includes a first isolating zone and a first conduction zone which are mutually isolated; first electrodes which are positioned in the first isolating zone of the second conductive layer and the electrochromism layer and are electrically connected to the first conductive layer; second electrodes which are positioned on a surface of the first conduction zone of the second conductive layer, and are electrically connected to the first conduction zone of the second conductive layer; and a first shading layer shading the first isolating zone and for shading light. The first shading layer for shading light can shade the first isolating zone, leaked light in the first isolating zone can be shaded after the electrochromism glass changes a color, and then the color changing evenness of the electrochromism glass can be improved, and the performance of the electrochromism glass can be improved.