36results about How to "The preparation method is simple and flexible" patented technology

The invention discloses a preparation method of a MnO<2>/Ti<3>C<2>T<x>Mxene flexible supercapacitor electrode material, and belongs to the technical field of energy storage materials. According to thepreparation method, MnO<2>and Ti<3>C<2>T<x>Mxene are combined to prepare the flexible supercapacitor electrode material with high electrochemical performance and mechanical property. Specifically, LiF and HCl are used as corrosive liquids, and an Al layer of Ti<3>AlC<2> is corroded to obtain Ti<3>C<2>T<x>; then MnCl<2>.4H<2>O and Ti<3>C<2>T<x> are mixed and heated at a certain mass ratio to be subjected to a redox reaction under the effect of KMnO<4> to enable the generated MnO<2> nano rods to be deposited on Ti<3>C<2>T<x>; and finally, washing and drying are carried out to obtain the flexible supercapacitor electrode material. According to the invention, MnO<2>with excellent specific capacitance is utilized, and specific to the defect that the conductive performance thereof is poor, an in-situ deposition method is adopted; the MnO<2> nano rods are deposited on the Ti<3>C<2>T<x>Mxene material with excellent conductivity to obtain the flexible MnO<2>/Ti<3>C<2>T<x>Mxene composite electrode material, so that not only rapid transmission of electrons is ensued, but also the resistance of the system is lowered; and the capacitor prepared by the electrode material has the characteristicsof high flexibility, excellent cycling stability, high energy density and the like.

The invention relates to a composite material, a catalyst using the composite material as a carrier, and a preparation method and applications of the catalyst, wherein particularly an electrocatalystN/MO2-C based on metal oxide-electric conduction material composite fiber/MO2-C and using the metal oxide-electric conduction material composite fiber/MO2-C as a carrier is prepared based on an electrospinning technology and a solution method. According to the present invention, the electrocatalyst carrier/MO2-C is metal oxide-electric conduction material composite fiber; the catalyst carrier canbe dispersed in the solution, and then Pt catalyst particles can be introduced through a reducing method, or a Pt salt precursor can be added to a spinning solution, and then the Pt-based electrocatalyst is prepared through a one-step method; through the addition of the electric conduction carbon material and the one-step low temperature treatment of the polymer nanometer fiber at the late stage,the loose porous structure of the prepared carrier is ensured while the electric conductivity of the carbon material to the carrier and the structural stability are ensured; and through the one-step low temperature treatment in the air or oxygen atmosphere, the oxidation of the metal precursor salt is ensured while the decomposition of the polymer precursor and the stable presence of the carbon material are ensured.

The invention discloses a preparation method of an ultra-thin two-dimensional spin-crossover nanometer material. The ultra-thin two-dimensional spin-crossover nanometer material is obtained by dispersing a three-dimensional van der waals complex in a solvent for ultrasonic exfoliation, wherein a structure formula of the three-dimensional van der waals complex is Fe(XCN)2(1,3-bis(4-pyridyl)propane)2, and X is selected from S or Se. The invention further discloses the ultra-thin two-dimensional spin-crossover nanometer material prepared through the preparation method and application in preparinga molecular electronic device used for information storage or a molecular switch or molecular display thereof. The thickness of the ultra-thin two-dimensional spin-crossover nanometer material is about 1-10 nm, and by means of the ultra-thin two-dimensional structure, multistep spin-crossover behaviour is achieved; the ultra-thin two-dimensional spin-crossover nanometer material is simple to prepare, good in dispersion and stable in performance and has huge application prospects in the molecular electronic device aspect of information storage, molecular switches, molecular display and the like.

The invention relates to a preparation method of NiSe2/Ti3C2Tx high-performance supercapacitor nano composite material, belonging to the technical field of energy storage materials. A supercapacitor electrode material with good electrochemical performance is prepare by combining NiSe2 and Ti3C2Tx. In particular to an etching solution of LiF and HCl, the Al layer of Ti3AlC2 is corroded, At that same time, Ti3C2Tx thin sheet is deposite on the NiSe2 particles, and finally, the electrode material of the supercapacitor is obtain by washing and drying. The Ti3C2Tx powder is mix with NiCl2 accordingto a certain molar ratio, and the reaction is carried out under the action of a chelating agent to generate NiSe2 nano particles. The invention utilizes NiSe2 material with high theoretical specificcapacitance, and aiming at its disadvantage of poor conductivity, hydrothermal method, Ti3C2Tx nanosheets with good electrical conductivity were compounded with NiSe2 particles, NiSe2/Ti3C2Tx nanocomposites were obtained, which not only possessed better charge transfer and more active sites, but also improved the durability of NiSe2/Ti3C2Tx nanocomposites, thus improving the performance of supercapacitors.

The invention discloses a vanadium-carbon-based catalyst for desulfurization and denitrification comprising a carbon material and vanadium serving as an active component, wherein measured by V2O5, vanadium accounts for 0.5%-10% of the weight of the catalyst, and the balance is the carbon material. The vanadium-carbon-based catalyst has the advantages that the preparation method is simple and convenient, the active component is uniformly distributed, and the sulfur capacity and denitrification activity are remarkably improved with a regeneration process.

The invention discloses a refractory material lining body for a steel ladle and a preparation method of the refractory material lining body. The refractory material lining body comprises a working lining and a permanent lining. The working lining is located on the inner side of the permanent lining, the working lining is made of a heavy calcium hexaluminate material to be used for resisting the high temperature, and the permanent lining adopts a medium-heavy or light calcium hexaluminate material to be used for conducting heat preservation and thermal insulation. The working lining and the permanent lining can be manufactured by adopting the methods of in-situ casting, a prefabricated member or a refractory brick. According to the refractory material lining body for the steel ladle, the problem that the steel ladle refractory material causes impurities in molten steel can be solved, no impurity can be led into the molten steel in the using process, meanwhile the impurities in steel canbe captured, and the molten steel can be purified and the quality is improved.

The invention belongs to the related technical field of microelectronic packaging, and discloses an airtight packaging structure of an integrated thermoelectric refrigerator and a preparation method thereof. The airtight packaging structure of the integrated thermoelectric refrigerator comprises a packaging cover plate, a chip, the thermoelectric refrigerator and a three-dimensional ceramic substrate, a cavity is formed in the three-dimensional ceramic substrate, the chip is arranged in the cavity, and the packaging cover plate is in airtight connection with the three-dimensional ceramic substrate so as to package the chip in the cavity; the three-dimensional ceramic substrate is connected with the thermoelectric refrigerator, and the three-dimensional ceramic substrate and the thermoelectric refrigerator share one ceramic substrate, so that the heat dissipation refrigerator and the three-dimensional ceramic substrate are combined to form an airtight packaging structure. According to the airtight packaging structure, the three-dimensional DPC ceramic substrate is used, and interconnection between the inside and the outside of the cavity is realized by utilizing the cavity structureand the vertical interconnection characteristic of the three-dimensional DPC ceramic substrate; the three-dimensional DPC ceramic substrate is used as a ceramic substrate of the TEC, that is, the thermoelectric refrigerator and the three-dimensional ceramic substrate share the ceramic substrate, so that one layer of ceramic substrate and one layer of welding interface are reduced, the heat dissipation capability of the device is improved, the thermal resistance can be reduced, and the packaging integration degree is improved.

The invention discloses anti-fake ticket thermo-sensitive paper suitable for the fields of entrance tickets, license plates, invoices and special labels. The anti-fake ticket thermo-sensitive paper has the developing function of common thermo-sensitive paper, in addition, after a color development device conducts developing, the black interior and red edge developing anti-fake function is achieved, the large developing area shows the black character pattern, and the edge of the black character pattern shows red. Accordingly, the common anti-fake ticket thermo-sensitive paper easy to distinguish is provided, and the forging behavior of the thermo-sensitive paper can be cracked down in the special field.

The invention discloses a three-dimensional spin-crossover gel material as well as a preparation method and application thereof. The gel material comprises PVDF, PEG, a two-dimensional spin crossover complex and lanthanide doped up-conversion nanoparticles, the two-dimensional spin crossover complex is [Fe(1, 3-bpp) 2 (NCS) 2]2, the mass percent of [Fe (1, 3-bpp) 2 (NCS)2] 2 to PVDF is 0.375%-6%, and the mass percent of up-conversion nanoparticles to PVDF is 0.075%-1.2%; and the mass ratio of the PEG to the PVDF is (0.2-1): (1-4). The three-dimensional spin-crossover gel material realizes a molecular spin-crossover behavior triggered by near-infrared light at normal temperature and normal pressure, is simple to prepare and stable in performance, and has a huge application prospect in the aspects of molecular electronic devices such as information storage, molecular switches and molecular display.

The invention discloses a preparation method of controllable multi-morphology microspheres. The method has the advantages of favorable biocompatibility and simplicity, and can be used for preparing the microspheres with complex morphologies in one step. The microspheres with corresponding complex morphologies are obtained through a gas-assisted microsphere preparation device, two types of coaxialnozzle systems are taken as examples, microspheres with three different types of morphologies are displayed, and microspheres with controllable morphologies are obtained by adjusting multiple parameters. The whole preparation method is simple, easy to operate and environmentally friendly, the microspheres of various complex morphologies can be prepared, the microsphere material has broad spectrumand high flexibility, and important reference is provided for preparation of the microspheres of various morphologies.