17results about How to "High mechanical flexibility" patented technology

The invention provides a current collector, a preparation method thereof and a battery. The current collector includes: a polymer layer; the metal layers are located on the surfaces of the two sides of the polymer layer; the through hole structure penetrates through the polymer layer and the metal layer along the thickness direction of the current collector; holes of the through hole structure are filled with a first lithium-philic polymer material. According to the current collector provided by the invention, the purpose of reducing weight is achieved through the synergistic cooperation of the structure and the material, the energy density of the current collector is improved, the uniform deposition of lithium is also realized, and the generation of lithium dendrites is avoided; meanwhile, the effect of reducing the occurrence probability of thermal runaway is also achieved, and the electrochemical performance of the battery is improved.

This application discloses a flexible light-emitting sensor, its fabrication method, and its application in the non-destructive detection of mercury ions, belonging to the field of sensor materials and detection technology. The technical solution of this application introduces phycocyanin as a functional crosslinking agent into a polyacrylamide (PAAM) network. The prepared phycocyanin-polyacrylamide (PC-PAAM) hydrogel combines the structural stability of polyacrylamide with the fluorescence properties and chemical reactivity of phycocyanin. This gel, within a soft and biocompatible monomer network, integrates strong responsive fluorescence, intrinsic antioxidant protection, and excellent underwater adhesion, achieving direct fingertip contact surface sensing with a synergistic mechano-optical effect. Furthermore, by combining a machine learning model trained based on hydrogel fluorescence images, it can further support precise, portable, and visualized quantitative analysis of mercury ion pollution using smartphone imaging technology.

The invention discloses a preparation method of a PDMS (Polydimethylsiloxane) film for chip microfluidics, and belongs to the technical field of micro-fluidic chip manufacturing. According to the method, in-situ graft polymerization of polyethylene glycol methacrylate in a polydimethylsiloxane network is initiated by ultraviolet, so that chemical bonding of a hydrophilic chain segment is realized; silane-modified aluminum oxide nanoparticles are adopted as an insulating heat-conducting filler, single-particle-level dispersion is realized under the vacuum ultrasonic synergistic effect, and a dual-channel heat-conducting network is constructed; and a 3D printing mold is utilized, so that the limitation of a traditional photoetching process is avoided. The water contact angle of the prepared PDMS film is reduced to 35-45 degrees, the heat conductivity coefficient is increased to 0.48-0.52 W / (m.K), the volume resistivity is kept to be 1014 omega.cm or above, the demolding success rate of an arc-shaped structure reaches 92% or above, the preparation period is shortened to 4-6 hours, and a new technical path is provided for large-scale manufacturing of micro-fluidic chips.

The invention discloses a preparation method of a thermal interface composite material with high toughness and high heat conductivity coefficient. The thermal interface composite material prepared by the invention consists of matrix resin and metal heat-conducting filler, wherein the matrix resin comprises organic silicon resin, a curing agent, a catalyst and a functional additive; the heat-conducting filler is metal nanoparticles which grow in a fractal manner. The preparation method comprises the following steps: mixing and stirring organic silicon resin, a curing agent and a catalyst to obtain a resin precursor, adding spherical or urchin-shaped metal nanoparticle heat-conducting filler, stirring, smearing to form a film, and curing at a certain temperature to obtain the high-toughness and high-heat-conductivity-coefficient thermal interface composite material. The metal heat conduction filler with the sea urchin-shaped fractal growth morphology is adopted, and based on the high specific surface area and the physical embedding effect of the sea urchin-shaped filler, the provided thermal interface composite material is easy to prepare, has the heat conductivity as high as 8.0 W / mK and excellent mechanical flexibility performance at the same time, and has the characteristics of low energy consumption, simple process, safety and environmental protection at the same time.

This invention discloses a high-load transparent rare-earth complex organic glass scintillator, its preparation method, and its applications. The scintillator comprises a polymer matrix and an ionic rare-earth complex dispersed therein. The rare-earth complex includes a coordinating anion and an ionic liquid cation. The coordinating anion includes rare-earth ions and organic ligands, and the loading of the rare-earth complex in the polymer matrix can reach 80-90 wt%. By introducing an ionic liquid to construct an ionic supramolecular structure, the scintillator effectively isolates the luminescent center using steric hindrance and charge shielding effects, suppressing concentration quenching and enhancing compatibility with the matrix, allowing the material to maintain transparency of over 90% even under ultra-high loading. The scintillator exhibits a radiative luminescence intensity up to 23.9 times that of commercial LYSO, with a detection limit as low as 56 nGy / s, making it suitable for high-energy particle detection and X-ray imaging.

The invention provides a composite current collector and a preparation method and application thereof. The composite current collector comprises a porous metal intermediate layer; the porous polymer layers are located on the surfaces of the two sides of the porous metal middle layer respectively; holes of the porous polymer layer are filled with metal particles. According to the composite current collector provided by the invention, the conductivity is improved, the uniform deposition of Li < + > is promoted, the existence of lithium dendrites is avoided, and the composite current collector has a lighter design, so that the energy density of a battery is improved, meanwhile, heat rise during thermal runaway of a battery cell is also prevented, heat diffusion is prevented, and the safe formation of the battery is improved; and in addition, the welding problem is solved, and the advantage of convenience in practical application is achieved.

The invention relates to the technical field of gas sensing, in particular to a hydrogen sensor based on a single cerium oxide nanowire and a preparation method of the hydrogen sensor. The sensor comprises a conductive silver paste dispensing area, a conductive metal coil and a molecular sieve coating area, wherein a cerium oxide nanowire is tightly attached to the surface of a molecular sieve. Compared with a conventional sensor preparation method, the preparation cost is greatly reduced by preparing the cerium oxide nanofiber, and the sensor preparation method is also suitable for other sensing materials; a non-liquid phase in-situ assembly method is used, and compared with liquid phase transfer, the method is more convenient.

The application discloses a preparation method of an ionic hydrogel-based humidity generator for efficient power generation and self-powered sensing. By preparing an ionic hydrogel prepolymer solution rich in active functional groups, a pre-polymer hydrogel is formed by short-time initial ultraviolet irradiation. After the pre-polymer hydrogel is transferred to the surface of an electrode, secondary ultraviolet irradiation is performed to enable chemical bonding and interpenetrating network structure between the hydrogel and the electrode. Finally, an active metal top electrode is attached. Through the synergistic design of the two-step curing method and the active electrode, on the one hand, the firm interface combination of the hydrogel and the electrode is realized, and the contact impedance is significantly reduced; on the other hand, the additional output is generated by the redox reaction between the active electrode and the hydrogel, thereby greatly improving the electrical output performance of the device. The obtained generator has excellent electrical output performance in a wide temperature and humidity range, and can be integrated for power supply and used as a high-sensitivity self-powered sensor, and has application prospects in the field of flexible wearable devices.

The invention relates to the field of display, and discloses a crystal film screen based on a composite transparent electrode and a preparation method thereof, the crystal film screen comprises a transparent substrate, a composite transparent electrode layer and a lamp bead array; the composite transparent electrode layer is attached to the surface of the transparent substrate, and the lamp bead array is bonded to the side, away from the transparent substrate, of the composite transparent electrode layer. The transparent conductive oxide layer is filled in the crack gap through a magnetron sputtering process and compactly covers the surface, so that a continuous conductive path is formed, excellent balance between high light transmittance and low resistivity is realized, the non-periodic structure characteristic of disordered arrangement of a metal cracking network is utilized, and the light transmittance is improved. The moire phenomenon generated by regular wiring and a pixel array in a traditional photoetching process is effectively avoided from the physical principle, and the definition and the visual effect of a display picture are remarkably improved. In addition, the oxide layer on the surface can effectively block water and oxygen and protect an internal metal network from oxidation corrosion, so that the chemical stability of the electrode is improved.

The invention provides a composite current collector and a preparation method and application thereof. The composite current collector comprises a polymer film layer which is provided with a through hole structure penetrating through the surfaces of the two sides; the lithium-loving compound nano arrays are distributed in non-porous areas on the surfaces of the two sides of the polymer film layer; and the metal layers are located in areas, where the lithium-loving compound nano array is not distributed, of the surfaces of the two sides of the polymer film layer. The composite current collector provided by the invention has the advantages of stable structure, tight combination of each structural layer, difficult falling and excellent mechanical flexibility, provides abundant deposition space for lithium ion deposition, enhances the conductivity of the current collector, improves the energy density and cycle life of the battery, and also reduces the occurrence probability of thermal runaway of the battery.

The invention relates to an out-of-plane / in-plane differential response flexible sensing material and a preparation method thereof, and belongs to the field of flexible sensing materials. The chemical formula of the flexible sensing material is xAg / PDMS, the numerical value of x is 0-60 vol% and is not 0, x is the volume ratio of Ag to PDMS, the particle size range of Ag nanoparticles is 0.01-20 [mu] m, the functional auxiliary material of the flexible sensing material is a perovskite structure ferroelectric ceramic material (BCZT), and the volume ratio of Ag to BCZT is 3: 100. According to the flexible sensing material, silver nanoparticles and PDMS are compounded, and the silver nanoparticles are regulated by means of an external electric field to form Ag nanoparticle columns which are aggregated in the out-of-plane direction and are isolated from one another, so that the Ag nanoparticles are arranged in a chain shape in the out-of-plane direction, and differential response of high out-of-plane sensitivity / insensitive in-plane sensitivity is achieved; the construction of a quasi-conductive network is realized under the condition of low filling amount, meanwhile, good mechanical flexibility of the material is maintained, and the specific types and geometrical shapes of the conductive particles can be flexibly selected according to actual requirements.

The invention discloses a preparation method of a full-flexible PZT film, which comprises the following steps: (1) uniformly depositing an LSMO coating on a fluorophlogopite substrate, and crystallizing the LSMO coating; (2) spin-coating a plurality of PZT thin film layers on the crystallized LSMO coating to obtain a PZT / LSMO / mica product; (3) preparing a flexible supporting layer on the PZT thin film layer; and (4) immersing the product in an etching solution to completely dissolve the LSMO coating so as to obtain the full-flexible PZT film. The invention also discloses a preparation method of the full-flexible PZT sensor. The preparation method comprises the following steps: S1, designing the interdigital electrode and printing the interdigital electrode on the PET substrate; and S2, transferring the full-flexible PZT thin film to a PET substrate, and then performing packaging and polarization to obtain the full-flexible PZT sensor. The full-flexible PZT sensor with the characteristics of high performance and ultrasensitivity is obtained on the flexible PET substrate through a transfer strategy with high cost performance, so that not only is the excellent electrical property of the perovskite structure film improved, but also higher mechanical flexibility is shown.

The invention provides a preparation method of a solid-state fiber flexible battery, the solid-state fiber flexible battery and application, and relates to the field of flexible batteries. A coaxial wet spinning technology is innovatively introduced into manufacturing of the solid fiber flexible battery, a coaxial fiber structure comprising the positive electrode, the solid electrolyte and the negative electrode is prepared through a one-time forming technology, and the battery has excellent mechanical flexibility, high energy density and good safety; the energy requirements of wearable equipment and flexible electronics in the future can be met; the flexible battery has remarkable technical innovation and industrial application value in the technical field of flexible batteries.

The invention discloses a method for constructing a high-performance flexible interdigital supercapacitor and an integrated circuit by using chlorine / bromine doped graphene nanosheets, the ultra-stable chlorine / bromine doped graphene nanosheets are prepared by using a one-step graphite electrocorrosion technology, and the doping proportion of chlorine / bromine in the graphene nanosheets can be adjusted by optimizing the concentration of ammonium halide. And performing reduced pressure filtration on the graphene nanosheet aqueous solution to form a graphene electrode pattern in a hollow area of the metal template, transferring the graphene electrode pattern to a high-molecular transparent substrate, and smearing an aqueous gel electrolyte on the electrode pattern to manufacture the series-parallel connection arbitrary combination integrated circuit. The surface charge distribution is improved by constructing a nanosheet structure and introducing a carbon-halogen bond, so that the dispersity of graphene in water is remarkably improved, the stability of a graphene aqueous solution is greatly improved, the stacking problem in the service process of a graphene electrode is avoided, the cycling stability of the flexible interdigital supercapacitor is improved, and the flexible interdigital supercapacitor has a good application prospect. The constructed flexible interdigital supercapacitor has very good mechanical flexibility, flexible assembly of an integrated circuit can be realized by connecting the interdigital electrodes on the flexible substrate in series and in parallel, and power supply support is provided for various electronic devices. The whole construction process is simple and convenient, the repeatability is good, and no metal current collector, conductive agent or polymer adhesive is used.

The invention belongs to the technical field of anion exchange membranes, and discloses a method for preparing a quinine anion exchange membrane by pre-irradiation grafting, which comprises the following steps: by taking a linear carbon chain polymer as a base material and a vinyl monomer as a grafting monomer, firstly, pre-irradiating the linear carbon chain polymer by an electron beam radiation source; then carrying out a grafting reaction on the pre-irradiated base material in a vinyl monomer solution, and then carrying out a quaternary ammonification reaction on the obtained grafted polymer and a quinuclidine solution, so as to obtain the quinine anion exchange membrane. The method is relatively simple in overall process, mild in reaction condition, relatively short in reaction time and relatively low in cost; compared with a biphenyl quinine anion exchange membrane, the prepared quinine anion exchange membrane has higher anion conductivity and better mechanical strength, and compared with a piperidine anion exchange membrane and a trimethylamine anion exchange membrane, the prepared quinine anion exchange membrane has higher chemical stability; and the material can be applied to the fields of fuel cells, electrolyzed water, flow cells and the like.

The invention discloses a photoactive dielectric film, a preparation method and application, and relates to the field of organic electronics and neuromorphic devices, the film is made of a poly (octyl citrate)-cysteine copolymer, and the film has enhanced photoluminescence characteristics after being thermally activated; according to the photoactive dielectric film, L-cysteine is introduced into a polyester matrix, and specific heat treatment (180 DEG C or 200 DEG C annealing) is performed after synthesis, so that the dielectric film is endowed with an adjustable photoluminescence characteristic, and the dielectric layer is converted into an active photoactive functional layer from a passive insulating layer; therefore, the multi-wavelength light response of the neuromorphic device is effectively improved.

The invention provides a preparation method of nano-crystalline cellulose flexible aerogel, nano-crystalline cellulose is used as a matrix substance to prepare nano-crystalline cellulose based conductive aerogel, and the nano-crystalline cellulose is also used as a dispersing agent of a conductive carbon material to assist the conductive carbon material to be uniformly dispersed in water; then polymerizing a layer of conductive polymer outside the nanocellulose-based conductive aerogel by using an in-situ oxidative polymerization method to form a core-shell structure, and finally freeze-drying at low temperature to prepare the nanocellulose flexible aerogel. The nanocellulose flexible aerogel prepared by the method has a three-dimensional network structure inside, is low in density and good in flexibility, has good electric conduction and electricity storage functions, and has application value in the fields of supercapacitors and sensors.