16 results about "Membrane conductivity" patented technology

The invention discloses a cross-linked polystyrene anion exchange membrane as well as a preparation method and application thereof. The preparation method of the cross-linked polystyrene anion exchange membrane comprises the following steps: firstly, taking styrene and p-chloromethyl styrene as monomers, and obtaining a copolymer through bulk polymerization under the action of an initiator; the preparation method comprises the following steps: firstly, preparing a copolymer from polystyrene, then preparing a membrane casting solution from the copolymer and 1, 4-diazabicyclo [2.2. 2] octane, casting to form a membrane, then immersing the obtained membrane into a trimethylamine aqueous solution for complete quaternization, and finally treating in a KOH aqueous solution to obtain the cross-linked polystyrene anion exchange membrane. The invention provides an application of the cross-linked polystyrene anion exchange membrane in alkaline electrolyzed water. The anion exchange membrane is simple in synthesis process, reagents are cheap and easy to obtain, the contradiction between the OH <-> conductivity and the size stability of a traditional anion exchange membrane can be greatly balanced, and meanwhile the anion exchange membrane has high alkaline stability and shows excellent electrolytic performance in alkaline electrolyzed water.

The application discloses a branched polyarylpipeidine film containing a multi-aromatic ring unit and a preparation method and application thereof, and belongs to the technical field of fuel cells and anion exchange membranes for hydrogen production by water electrolysis. The branched polyarylpipeidine main chain is constructed by introducing a multi-aromatic ring branched unit with multiple reaction sites into a conventional linear polyarylpipeidine main chain, so that the packing density of the main chain is reduced, the formation of ion clusters is facilitated, and the membrane conductivity is improved. The branching degree can be controlled by flexibly adjusting the feeding of the multi-aromatic ring branched monomer. The conductivity of the branched polyarylpipeidine film is improved by more than 26% compared with that of the linear film, and the branched film has a lower swelling rate, a higher power density of a hydrogen-oxygen fuel cell and a higher water electrolysis hydrogen production performance.

The invention relates to a fuel cell proton exchange membrane and a preparation method thereof, and the preparation method comprises the following steps: uniformly mixing a neutral Nafion solution and organic alcohol, and carrying out heat preservation treatment at 200-240 DEG C to obtain a resin solution; coating a first layer of resin solution on a substrate, covering the porous membrane on the first layer of resin solution, pre-drying, then coating a second layer of resin solution on the porous membrane, and pre-drying to obtain a composite membrane; and performing drying, heat treatment and post-treatment on the composite membrane to obtain the fuel cell proton exchange membrane. According to the invention, the organic alcohol is added into the neutral Nafion solution, and the resin solution meeting the requirements of the subsequent process can be obtained at one time through heat preservation treatment; the composite film is prepared by coating, so that the defect that bubbles are easily generated by negative-pressure impregnation is avoided; the proton exchange membrane is simple in preparation steps, low in cost and high in efficiency; the obtained proton exchange membrane is good in conductivity performance and excellent in mechanical performance.

The utility model provides a rapid clamping four-electrode membrane conductivity test fixture, and belongs to the technical field of test fixtures. Comprising a placing plate; the placing groove is formed in the placing plate, and the placing groove is used for containing a to-be-tested film; the fixing block is detachably mounted on the placing plate, and the fixing block is used for fixing one end of a to-be-tested film on the placing plate; the sliding block is detachably arranged in the placing groove in a sliding manner; and the flexible roll shaft is rotationally arranged in the sliding block. Through the cooperation of the placing plate, the fixing block, the flexible roll shaft, the sliding block and other structures, the purpose of ensuring the flatness of a film to be detected in the clamping process is achieved, and through the cooperation of the extrusion plate, the sleeve, the sleeve rod, the knob and other structures, the film to be detected is always kept flat when making contact with an electrode slice, and the detection accuracy is improved. Therefore, the to-be-detected film is prevented from generating radian after being contacted with the electrode plate.

The disclosure proposes a solid electrolyte membrane and a preparation method and an application thereof. The solid electrolyte membrane includes a binder and a sulfide solid electrolyte. The sulfide solid electrolyte has a molecular formula of LifP1-gEgSwOgQz, wherein, 5<f<10; 0<g<1, 3<w<6, 4<w+g<6, 0<z<2; E is selected from one or more of Mg, Ca, Sr, Ba, Zn, Cr, Sn or Pb; Q is selected from one or more of Cl, Br or I. Ionic conductivity of the solid electrolyte membrane is 1×10−3 S / cm to 2×10−2 S / cm. Through the solid electrolyte membrane and the preparation method and the application thereof proposed by the disclosure, the stability of the conductivity of the solid electrolyte membrane may be enhanced, the air stability may be enhanced, and the lifetime and safety of all-solid-state lithium-ion batteries may be improved.

The utility model provides a four-electrode membrane conductivity test platform, and belongs to the technical field of four-electrode membrane conductivity test. Comprising a workbench; the placing groove is formed in the workbench; the testing pool is arranged in the placing groove; and the first circulating pump is arranged on the workbench. By arranging the vibrator, the vibrating rod and the connecting wire, the vibrating rod can effectively vibrate the bottom of the testing pool, bubbles in a solution can be promoted to float upwards, the number of the bubbles in the solution can be reduced, then the solution on the inner surface of the testing pool can be pumped out through a small circulation system composed of the first circulating pump, the first pumping pipe and the first return pipe, and therefore the testing accuracy is improved. The bubbles in the extracted solution can be separated out through the bubble separation piece, and then the solution after bubble separation flows back into the test pool through the first return pipe, so that the bubbles in the solution are further reduced, and the interference of the bubbles on conductivity test is reduced.

Improved performance ion exchange membranes for use in PEM, AEM and DMFC fuel cells, buffered fuel cells, hydrolysis, other applications comprise a molecular matrix of homopolymers, di-monomer, heteropolymers, copolymers, or block-polymers of fluorocarbon and hydrocarbon compounds combined with (i) skeletal support grid to improve durability, handling, reduce membrane swelling, and sequester dopants and nanoparticles from leakage; (ii) microporous membrane formed using a sacrificial filler process enhancing conductivity and limiting fuel crossover; (iii) hetero-ionomeric matrix of two-or-more membrane-bound acids e.g. sulphonic and phosphonic acid expanding usable range; (iv) permanent fillers enhancing conductivity and porosity including nanoparticles, metal-oxides, zeolites, silicates, GOs, CNTs, MOFs, POSS, and others; (v) ionic liquid doping to enhance membrane conductivity; (vi) membrane nanocoating preventing H2O2 diffusion; and / or (vii) catalytic nanocoating with metals, metal-oxides, and MOFs preventing atmospheric toxin catalyst poisoning. Combined with a heterogenous GDL, the IEM is integrated into iBFC power blade and energy bank applications.

The utility model relates to a kind of device for measuring diaphragm conductivity of hydrogen production device, including box, the top of box is downwardly provided with detection groove, cathode electrolytic cell and anode electrolytic cell are respectively provided in the left and right sides of detection groove of box, the left and right side walls of detection groove are respectively provided with through hole being communicated with cathode electrolytic cell and anode electrolytic cell.This utility model relates to the technical field of hydrogen production system.The device for measuring diaphragm conductivity of hydrogen production device, by the anode clamp, cathode clamp and detection groove being set, the anode clamp and cathode clamp can be supported using detection groove, so that it always keeps the state of clamping diaphragm, so that the installation detection of diaphragm is more convenient, the replacement of diaphragm subsequent is also more simple, and the detection efficiency of diaphragm can be effectively improved.

A diaphragm conductivity testing device belongs to the technical field of ionic membrane detection for flow batteries. The device comprises two electrolytic cell substrates with the same structure, the two electrolytic cell substrates are clamped through clamping plates on the two sides, a diaphragm to be tested is clamped between the two electrolytic cell substrates, electrolytic cells are arranged in the middles of the two electrolytic cells, the two sides of the diaphragm are communicated with the interiors of the two electrolytic cells respectively, and the diaphragm is arranged in the middle of the two electrolytic cells. The electrolytic tank base bodies are respectively connected with a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlet pipeline and the liquid outlet pipeline are both connected into a solution temperature control box filled with a test system solution, a compensation heating plate is arranged on the side wall of the electrolytic tank, platinum electrodes are arranged on the two electrolytic tank base bodies, and the two electrolytic tank base bodies are respectively connected with the liquid inlet pipeline and the liquid outlet pipeline. The two platinum electrodes are both communicated with the inside of the electrolytic tank, and are both connected with leading-out electrodes for being connected with an external power supply. Data tested by the device can truly reflect the electrochemical performance of the ionic membrane in different practical application scenes.

The application discloses a method for improving the conductivity of a PEDOT:PSS film, and a PEDOT:PSS film, and belongs to the field of conductive films, wherein the method comprises the following steps: dropping a nitric acid solution on the surface of a PEDOT:PSS film to be treated, and then standing and drying to obtain an acid-treated PEDOT:PSS film; and the concentration of the nitric acid solution is greater than or equal to 10 mol / L. The application finds that the surface of the PEDOT:PSS film is treated by dropping an appropriate amount of a high-concentration nitric acid solution, and the conductivity of the PEDOT:PSS film can be significantly improved, and meanwhile, the acid treatment process does not need water washing, heat annealing and other steps, is more efficient and faster, provides a new technical means for the modification of the PEDOT:PSS film, and has a wide application prospect.

The invention is applicable to the technical field of fuel cells, and provides a graft modified polybenzimidazole proton exchange membrane and a preparation method thereof, and the preparation method comprises the following steps: Step 1, synthesizing a halogenated bisulfonyl imide compound; step 2, synthesis of bis-sulfonylimide side group polybenzimidazole: dissolving OPBI in a proper amount of a polar solvent, adding a proper amount of LiH at 120 DEG C to activate OPBI for about 4-12 h, after complete activation, adding a mixture of a certain amount of halogenated bis-sulfonylimide compound and a proper amount of KI, and continuing to react for 24 h; after the reaction is finished, pouring the product into distilled water while the product is hot, fully washing with a proper amount of hydrochloric acid, washing off redundant hydrochloric acid with a proper amount of sodium carbonate, and completely drying to obtain the product bis-sulfonimido side group polybenzimidazole; and step 3, preparing the proton exchange membrane of the bis (sulfonyl) imide grafted polybenzimidazole. According to the scheme, raw materials are low in cost and easy to obtain, synthesis conditions are mature, the yield and feasibility are high, the product membrane conductivity is high, the output characteristic of a fuel cell is improved, and wide application prospects are achieved.

The application provides a diaphragm conductivity test clamp and a diaphragm conductivity test method. The diaphragm conductivity test clamp comprises: a first liquid storage tank and a second liquid storage tank, the first liquid storage tank is provided with a first liquid inlet and a first conducting port, the second liquid storage tank is provided with a second liquid inlet and a second conducting port, and the first conducting port and the second conducting port are correspondingly arranged; a first electrode and a second electrode, the first electrode is arranged in the first liquid storage tank, and the second electrode is arranged in the second liquid storage tank; and a filling pad, which is clamped between the first liquid storage tank and the second liquid storage tank, and is provided with a communication port penetrating through the filling pad, the first conducting port and the second conducting port are communicated through the communication port, and the area of the first conducting port, the area of the second conducting port, the projection area of the first electrode on the filling pad and the projection area of the second electrode on the filling pad are all greater than the area of the communication port. Through the scheme, the problem of poor test precision of a liquid flow battery diaphragm can be solved.

The invention provides an n-type gallium oxide thin film and a preparation method and application thereof. The preparation method comprises the steps that an In-doped gallium oxide target material is provided, the structural formula of the In-doped gallium oxide target material is (InxGa1-x) 2O3, x is larger than 0 and smaller than or equal to 0.05, and the In doping concentration is smaller than or equal to 5% by mole; and depositing the In-doped gallium oxide target material on a substrate, and growing the In-doped gallium oxide thin film. The invention also discloses the n-type gallium oxide thin film prepared by the method, and application of the thin film in preparation of ultraviolet electronic devices. The In doping scheme provided by the invention is suitable for preparing ultra-wide forbidden band low-resistance gallium oxide films with different crystal phases, has relatively high conductivity on different types of heterogeneous substrates, and can effectively support research and development of different types of electronic devices; the conductivity and optical characteristics of the thin film can be effectively adjusted by adjusting and controlling the In doping concentration, the preparation process is simple, and good universality is achieved.

The application provides an n-type gallium oxide thin film and a preparation method and application thereof. The preparation method comprises the following steps: providing an In-doped gallium oxide target material, a structural formula of the In-doped gallium oxide target material is (In x Ga 1‑x )2O3, 0 < x ≤ 0.05, wherein the concentration of In doping is ≤ 5% molar ratio; depositing the In-doped gallium oxide target material on a substrate to grow an In-doped gallium oxide thin film. The application further discloses the n-type gallium oxide thin film prepared according to the above method and application of the thin film in preparation of ultraviolet photoelectronic devices. The In doping scheme of the application is suitable for preparation of super-wide band gap low resistance gallium oxide thin films with different crystal phases, and has high conductivity on different types of hetero-substrates, which can effectively support research and development of different types of electronic devices. The application can effectively adjust the conductivity and optical properties of the thin film by adjusting the In doping concentration, and the preparation process is simple and has good universality.

The invention discloses a CO2 corrosion resistant high-stability anion exchange membrane and a preparation method thereof, and belongs to the technical field of electrochemical materials. The anion exchange membrane comprises a surface compact layer and an inner support layer, the surface compact layer is a PAEN nanofiber layer, and phosphonate groups and a free radical scavenger are doped in the PAEN nanofiber layer; and the inner supporting layer is a porous PAEN base material. Through gradient pore structure design, phenothiazine free radical scavenger adding and a roll-to-roll continuous process, the technical effects that the membrane conductivity is larger than or equal to 80 mS / cm, the alkali-resistant life is larger than or equal to 3000 hours, and the CO2 permeability is smaller than or equal to 1 * 10 <-6 > cm < 3 > / cm < 2 >. S are achieved, the performance of an AEM electrolytic cell in a pure water environment is remarkably improved, the service life of the AEM electrolytic cell in the pure water environment is remarkably prolonged, and key material support is provided for large-scale production of green hydrogen.

The application is suitable for the field of fuel cell technology, and provides a grafted modified polybenzimidazole proton exchange membrane and a preparation method, which comprises the following steps: Step 1, synthesizing a halogenated bis-sulfonimide compound; Step 2, synthesizing a bis-sulfonimide side group polybenzimidazole: OPBI is dissolved in a proper amount of a polar solvent, OPBI is activated by adding a proper amount of LiH at 120 DEG C for about 4-12 h, after complete activation, a certain amount of the halogenated bis-sulfonimide compound is added and mixed with a proper amount of KI, and the reaction is continuously carried out for 24 h; after the reaction is completed, the product is poured into distilled water while hot, washed with a proper amount of hydrochloric acid, and then washed with a proper amount of sodium carbonate to remove the excess hydrochloric acid, and the product bis-sulfonimide side group polybenzimidazole is obtained after complete drying; Step 3, preparing a bis-sulfonimide grafted polybenzimidazole proton exchange membrane. The raw material cost of the scheme is low, the raw material is easy to obtain, the synthesis condition is mature, the yield is high, the feasibility is high, the product membrane has high conductivity, the output characteristics of the fuel cell are improved, and the scheme has a wide application prospect.