43 results about "Proton transport" patented technology

This electrode catalyst layer for fuel cells is provided with: an electrode catalyst that comprises a conductive carrier and platinum-containing metal particles supported on the surface of the conductive carrier; and an ionomer that covers the electrode catalyst. This electrode catalyst layer for fuel cells is characterized in that the average thickness of the ionomer is 2.4 nm or less. This electrode catalyst layer for fuel cells is capable of having a good balance between proton transport properties and transport properties for a gas such as an oxidant gas or a fuel gas even in cases where the amount of supported platinum is decreased. In addition, an electrode for fuel cells, a membrane electrode assembly for fuel cells, and a fuel cell, each having good current-voltage characteristics, can be obtained using the above-described electrode catalyst layer for fuel cells.

The invention belongs to the field of preparation of ionic hydrogen-bonded organic framework materials, and specifically discloses an ionic hydrogen-bonded organic framework material with proton conductivity, and its chemical formula is: {TPE‑SO 3 H·2(DBD)·2(DMF)·4(H 2 O)} n , where n is a positive integer, TPE‑SO 3 H is 1,1,2,2-tetrasulfonic acid phenylethylene, DBD is (C 5 NH 4 NH 2 ) 2 2+ , DMF is N,N'-dimethylformamide. The structural unit belongs to the triclinic crystal system, the space group is P-1, and the molecular formula is C 52 h 62 N 10 o 18 S 4 , unit cell parameters: α=102.789°, β=99.968°, γ=112.169°, each repeating unit contains four water molecules and two DMF molecules, two DBD molecules and one TPE‑SO 3 H molecule, amino group on DBD molecule and TPE‑SO 3 The sulfonate group on the H molecule forms a one-dimensional hydrogen bond network with the water molecule. The material has good thermal stability and good performance for proton transport. The invention discloses a preparation method thereof, the synthetic raw materials are easy to obtain, and the preparation process is simple. The ionic hydrogen-bond organic framework material of the invention can be used as a proton-conducting material and has good application prospects.

The invention discloses a Cu-Mo-S composite material and its preparation method and application. The preparation method comprises the following steps: (1) adding divalent copper salt, molybdate and sulfur source into the mixed solution of alcohol and water Mixing until dissolved; (2) adding a reducing agent, transferring to a high-temperature reactor for heating reaction; (3) centrifuging the system after the heating reaction to remove liquid, and drying the obtained product. The Cu‑Mo‑S composite material has a hollow structure, which provides proton transport channels and accelerates the proton transport rate; by introducing molybdenum source and sulfur source in situ to increase the active sites and improve the conductivity of the material, the one-step synthesis of Cu The ‑Mo‑S composite material has good electrocatalytic hydrogen evolution activity and stability, can increase the cathodic hydrogen evolution rate in the electrolysis water device, and can be used as a hydrogen evolution reaction catalyst; at the same time, the preparation method has the advantages of simple synthesis and low cost.

The invention discloses a branched block polymer used in a proton exchange membrane, a preparation method and an application thereof, wherein the molecular structure of the polymer is similar to a "core-shell" structure, and the core structure is branched poly-p-phenylene biphenyl and imidazole, the shell structure is fluorine-containing polybenzimidazole; or the core structure is branched fluorine-containing polybenzimidazole, and the shell structure is poly-p-phenylene bibenzimidazole. Due to the introduction of a branched structure, a large number of protrusions and microcavities can be formed in the membrane made of polymer, which increases the free volume in the membrane, facilitates the absorption of phosphoric acid, and promotes the improvement of proton conductivity; at the same time, the block The structure of the membrane forms a microphase separation channel that is beneficial to the transport of protons. The two work together to make the phosphoric acid-doped polymer membrane of the present invention greatly improve the proton conductivity performance.

The invention relates to the field of block copolymers, in particular to a phosphonated hyperbranched polybenzimidazole-polysiloxane block copolymer and its preparation method and application. The block copolymer has amphiphilicity, and the block copolymer forms a soft-hard, hydrophilic-hydrophobic structure due to the combination of the soft segment of PDMS and the hard segment of LHBPBI, the hydrophobic segment of PDMS and the hydrophilic segment of LHBPBI. Phase-separated structure, the proton transport channel is constructed through the phase-separated structure of two chain segments. In addition, the hyperbranched structure of LHBPBI can accommodate more phosphoric acid, and the hyperbranched structure of LHBPBI contains a large number of active end groups that can introduce a large amount of phosphonic acid. Finally, high proton conductivity (up to 0.0889S / cm, tested at 180°C), high proton conductivity retention (up to 89.5%), high storage modulus (753MPa, tested at 180°C) block copolymers.

The invention relates to the field of block copolymers, in particular to a hyperbranched polybenzimidazole-polysiloxane block copolymer and its preparation method and application. The block copolymer has amphiphilicity, and the block copolymer forms a soft-hard, hydrophilic-hydrophobic structure due to the combination of the soft segment of PDMS and the hard segment of HBPBI, and the hydrophobic segment of PDMS and the hydrophilic segment of HBPBI. Phase separation structure, the proton transport channel is constructed through the phase separation structure of the two chain segments. In addition, the hyperbranched structure of HBPBI can accommodate more phosphoric acid, and finally obtain high proton conductivity (up to 0.085S / cm, the test temperature reaches 180°C), high proton conductivity retention rate (up to 85.1%), high storage modulus (767MPa, test temperature 180°C) block copolymer.

The invention relates to a polyolefin-g-polybenzimidazole graft copolymer and its preparation method and application. The graft copolymer is the grafting of polyolefin grafted benzimidazole polymer obtained by condensation reaction of the terminal amino group in the benzimidazole polymer and the carboxyl group in the side chain carboxyl-containing olefin polymer. branch copolymers. The proton transport channel is constructed by the phase separation structure of the two chain segments, thereby improving the proton conductivity and achieving a high temperature proton exchange membrane with high proton conductivity under the condition of a low phosphoric acid doping level (ADL<10). The preparation method is simple and easy to operate, and can be applied to fuel cells, liquid flow batteries and the like.

Object: To provide an ion exchange membrane which can achieve both high proton transport ability and high ion permeation selectivity, a membrane-electrode assembly including said ion exchange membrane, and a redox flow battery including said membrane-electrode assembly. Resolution Means: One aspect of the present disclosure provides an ion exchange membrane for a redox flow battery including an ion-conductive polymer and a non-woven fabric, wherein the non-woven fabric is disposed in the ion-conductive polymer. Another aspect of the present disclosure provides a membrane-electrode assembly including a positive electrode, a negative electrode, and the ion exchange membrane for a redox flow battery of the present disclosure, wherein the ion exchange membrane for a redox flow battery is disposed between the positive electrode and the negative electrode. Another aspect of the present disclosure provides a redox flow battery including a membrane-electrode assembly of the present disclosure.Yet another aspect of the present disclosure provides a method for producing an ion exchange membrane for a redox flow battery.

A molecular motor biosensor kit for detecting salmonella belongs to the field of food microorganism rapid detection, and mainly solves the problem of a long period (5-6 days) for traditional detection methods. The core technology of the invention is that since F0F1-ATP synthase can rotate rapidly, coupling between catalytic sites and proton transport is established through rotation by using the F0F1-ATPase molecular motor biosensor on a chromatophore. Firstly, an invA probe is connected with an epsilon subunit of the ATP synthase; a sample to be detected and a negative control are respectively combined with the biosensor; the ATP yield after the catalysis of ATP synthesis for 30 min is compared; the amount of ATP synthesis can be measured by the H+ amount in the environment, and the amount of H+ can be obtained by fluorescence intensity reflected by H-DHPE. The kit of the invention can rapidly and sensitively detect salmonella in samples to be detected with high throughput.

The invention discloses a cobalt-coated carbon-supported platinum catalyst Pt / (C@Co) with proton transport function and a preparation method thereof. The method comprises the following steps: (1) using nitrogen source or sulfur source ionic liquid to infiltrate graphite ene to obtain heteroatom-doped carbon black; (2) Prepare a layer of Co cladding layer C@Co core-shell structure on the surface of heteroatom-doped carbon black by electroless plating method; (3) The obtained C@Co The core-shell structure is polymerized with sulfonyl monomer, tetrafluoroethylene, additives, initiators, and organic solvents, and an appropriate amount of perfluoroSO is wound on the C@Co sphere 2 F macromolecule; (4) gained product is hydrolyzed, makes SO 2 F group converted to SO 3 ‑ Na + / K + Ion-exchange groups; (5) Mix the resulting product with platinum precursor solution, water, and ethylene glycol, and perform ultrasonic treatment; (6) Place the resulting mixed solution in a microwave reactor and heat it for reaction; (7) After the reaction is completed, Make the obtained colloidal system demulsify, filter; (8) Post-treatment.

The present application proposes a discrete modeling method for the electric drag effect of water transport in fuel cells, which includes the following steps: establishing a membrane water transport equation inside the fuel cell, discretizing the complete electric drag effect, and processing As a result, a complete discrete simulation model of the electrical drag effect was obtained, the membrane water transport equation was solved, and a discrete simulation model of the electrical drag effect of fuel cell water transport was established. The discrete modeling method for the electrical drag effect of fuel cell water transport described in this application performs discretization processing and numerical calculation on the complete electrical drag effect, including the water transport part caused by the membrane water content gradient. As well as the water transport part caused by the proton transport flux gradient, it makes up for the shortcomings of the existing simulation models that ignore the latter, which leads to the lack of accuracy in solving the internal water transport process of the fuel cell, and promotes the improvement of the reliability of the fuel cell simulation technology. Greatly reduce the experimental cost and product development cycle.

A polymer ion exchange membrane for acidic electrolyte flow battery. The membrane is nitrogen heterocycles aromatic polymer, especially polybenzimidazole type polymer. A nitrogen heterocycles in the membrane interact with acid in the electrolyte to form donor-receptor proton transport network, so as to keep the proton transport performance of the membrane. The preparation condition for the membrane is mild, and the process is simplicity. The preparation method is suitable for mass production. The membrane is used in acidic electrolyte flow battery, especially in vanadium flow energy storage battery. The membrane has excellent mechanical stability and thermostability. In vanadium redox flow battery, the membrane has excellent proton conduct performance and excellent resistance to the permeation of vanadium ions.