43 results about "Proton transport" patented technology

Compact particle selection and collimation devices are disclosed for delivering beams of protons with desired energy spectra. These devices are useful with laser-accelerated proton therapy systems, in which the initial protons have broad energy and angular distributions. Superconducting magnet systems produce a desired magnetic field configuration to spread the protons with different energies and emitting angles for particle selection. The simulation of proton transport in the presence of the magnetic field shows that the selected protons are successfully refocused on the beam axis after passing through the magnetic field with the optimal magnet system. Dose distributions are also provided using Monte Carlo simulations of the laser-accelerated proton beams for radiation therapy applications.

Provided is a battery comprising a first compartment, a second compartment and a barrier separating the first and second compartments, wherein the barrier comprises a proton transporting moiety.

A self-moisturizing polymer electrolyte membrane (PEM) composition, a membrane-electrode assembly, and a fuel cell. The PEM composition comprises (a) a proton-conducting polymer containing a detachable hydrogen ion and a counter-ion bonded to the polymer; and (b) a deliquescent material for keeping the membrane wet and for detaching the hydrogen ion to facilitate proton transport in the membrane. Alternatively, the deliquescent material may be strategically located on the gas flow field channels, gas-diffusion electrode or backing layers, and / or electro-catalyst layers. A preferred PEM polymer is poly(perfluoro sulfonic acid). This self-moisturizing PEM obviates the need to have a pre-humidifying structure or a complex flow field design in a fuel cell.

The present invention relates to functionalized polymers including a poly(phenylene) structure. In some embodiments, the polymers and copolymers of the invention include a highly localized concentration of acidic moieties, which facilitate proton transport and conduction through networks formed from these polymers. In addition, the polymers can include functional moieties, such as electron-withdrawing moieties, to protect the polymeric backbone, thereby extending its durability. Such enhanced proton transport and durability can be beneficial for any high performance platform that employs proton exchange polymeric membranes, such as in fuel cells or flow batteries.

The invention relates to a preparation method of an antibiotics self-powered aptamer sensor. The preparation method is used for detecting antibiotics according to the change of output property of an EBFC (enzymatic biofuel cell). The design of the self-powered sensing is mainly focused on an anode of the EBFC, a DNA (deoxyribonucleic acid) conjugate is modified to the surface of the anode, the steric hinerance influences the proton transport of glucose of the anode fuel, and the open-loop voltage is lower. When the target antibiotics exists, the aptamer modified to the surface of the anode is used for identifying the antibiotics medicine, and the DNA conjugate is disengaged, so that the anode can effectively catalyze the oxidizing of the glucose, the open-loop voltage of the EBFC is increased, the change value of open-loop voltage forms a proportional relationship with the concentration of the antibiotics, so that the antibiotics medicine is detected. The preparation method has the advantages that the additional power supply equipment is not needed in the sensor detection process, the cost is low, the anti-interference ability is strong, and the sensor has high selectivity by using the aptamer identifying function. The antibiotics self-powered aptamer sensor can be used for realizing the simple, quick, sensitive and efficient detection of the antibiotics medicine.

The invention relates to a high-temperature proton exchange membrane for fuel cells and a preparation method thereof, belonging to the technical field of fuel cells. The matrix of the high-temperature proton exchange membrane provided by the invention is composed of acidified organic polymers and nano-inorganic particles uniformly dispersed in the polymer matrix, and the surface of the inorganic particles is coated with a polymer capable of solvating protons; wherein the acidified The organic polymer is used as a proton donor, and the polymer coated with ether oxygen group on the surface of the inorganic particle has a solvation effect on the proton to generate free protons, and the acidified organic polymer and the inorganic particle coated with the ether oxygen polymer are mutually incompatible. Compatible, the formed phase interface provides a convenient channel for proton transport. This high-temperature proton exchange membrane for fuel cells does not depend on the existence of water under high-temperature conditions and has high proton conductivity, excellent alcohol resistance performance, mechanical properties, and low cost, and provides an industrially practical membrane for the fuel cell field. permanent proton exchange membrane.

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 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) soaking graphene with nitrogen source or sulfur source ionic liquid to obtain heteroatom-doped carbon black; (2) The core-shell structure of C @ Co coated on the surface of heteroatom doped carbon blackwas prepared by electroless plating. 3) polymerize that obtained C @ Co core-shell structure with sulfonyl monome, tetrafluoroethylene, assistant, initiator and organic solvent, and winding an appropriate amount of perfluoroSO2F polymer on the sphere of C @ Co; (4) hydrolyzing the obtained product to convert the SO2F group into SO3-Na + / K + ion exchange group; 5) mix that obtained product with aplatinum precursor solution, wat and ethylene glycol, and treating with ultrasonic wave; 6, place that obtained mix solution in a microwave reactor and heating the reaction; 7) demulsify that obtainedcolloidal system aft the reaction is finished and filtering; (8) Post-treatment.

The invention belongs to the field of preparation of ionic hydrogen bond organic framework materials, and particularly discloses an ionic hydrogen bond organic framework material with proton conduction performance, the chemical formula of the ionic hydrogen bond organic framework material is {TPE-SO3H. 2 (DBD). 2 (DMF). 4 (H2O)} n, n is a positive integer, TPE-SO3H is 1, 1, 2, 2-tetrasulfonic acidphenyl ethylene, DBD is (C5NH4NH2) 22+, and DMF is N, N '-dimethylformamide. The structural unit belongs to a triclinic system, the space group is P-1, the molecular formula is C52H62N10O18S4, the cell parameters are as follows: alpha = 102.789 degrees, beta = 99.968 degrees and gamma = 112.169 degrees, each repetitive unit comprises four water molecules and two DMF molecules, two DBD molecules and one TPE-SO3H molecule, and amino groups on the DBD molecules and sulfonate groups on the TPE-SO3H molecule form a one-dimensional hydrogen bond network with water molecules. The material has good thermal stability, and has good performance for proton transportation. The invention discloses the preparation method of the material, the synthetic raw materials are easy to obtain, and the preparation process is simple. The ionic hydrogen bond organic framework material disclosed by the invention can be used as a proton conducting material and has a very good application prospect.

Internal polar and ionizable groups are essential for enzymatic catalysis, proton transport, redox reactions, and many other functional properties of proteins. To engineer novel enzymes or to modify the function of existing ones, and to build switches that can be used to modify the stability of proteins in response to changes in pH, it is necessary to introduce polar or ionizable groups or to modify the properties of existing ones. However, internal polar and ionizable groups usually destabilize proteins. The disclosure provides new methods that allow the introduction of polar and ionizable groups into the interior of proteins, as well as new methods for improving the accuracy of pKa of an internal amino acid of a protein, and methods for mapping the folding free energy landscape of a protein.

The invention provides a composite high-temperature proton exchange membrane as well as preparation and application thereof. The composite high-temperature proton exchange membrane is an H3PO4 adsorbed PBI-SiO2 composite membrane, wherein SiO2 is acid modified ordered mesoporous SiO2, the mass content of SiO2 in the composite membrane is 0.1%-30%, and the mass ratio of acid to ordered mesoporous SiO2 is 0.001:1-0.2:1; the mass content of H3PO4 in the PBI-SiO2 composite high-temperature proton exchange membrane after H3PO4 adsorption is 70%-98%. Compared with the prior art, acid modified ordered mesoporous SiO2 contains a large number of hydrogen bonds, can form stronger intermolecular force with PBI, and has better dispersibility in hybrid membranes; acid modified ordered mesoporous SiO2 has ordered proton transport channels, and proton conductivity under the low humidity condition is improved; the prepared composite membrane has relatively high proton conductivity and good mechanicalproperties, and is the high-temperature proton exchange membrane with excellent comprehensive properties.

The invention discloses a carboxyl-containing sulfonated polyaryletherketone sulfone / phosphotungstic acid-loaded ionic liquid metal organic framework composite membrane and a preparation method thereof, and belongs to the field of polymer chemistry and proton exchange membrane fuel cells. The mass ratio of carboxyl-containing sulfonated polyaryletherketone sulfone to MIL-100 (FE) loaded with heteropoly acid anion-based ionic liquid is 1: (0.02-0.08). The MIL-100 (Fe) loaded with the heteropoly acid anion-based ionic liquid is provided with a large mesoporous cage and a small microporous window, and heteropoly acid anions are limited in a cavity of the MIL100 (Fe). By reacting the imidazole rings in the ionic liquid with heteropoly acid anions, the ionic liquid based on heteropoly acid anions is loaded in the MIL100 (Fe) without loss. The heteropoly acid anion-based ionic liquid loaded in the MIL100 (Fe) contains a large amount of imidazole rings, bridging oxygen W-O-W bonds and terminal oxygen W = O bonds, and proton transport of the hybrid membrane can be promoted. The MIL100 (Fe) can also enhance the mechanical properties, dimensional stability and alcohol resistance of the hybrid membrane. The proton conductivity of the composite proton exchange membrane at 80 DEG C is 0.041 S cm<-1> to 0.123 S cm<-1>, and the thickness of the hybrid membrane is 15-25 [mu] m.

The invention relates to a proton enhanced transport forward osmosis membrane, a preparation method and application thereof, and belongs to the technical field of osmosis membrane materials. The invention provides a preparation method of a proton enhanced transport forward osmosis membrane. The method comprises the following steps: respectively introducing metal organic framework nanoparticles into a support base membrane prepared by a phase inversion method and / or a salt intercepting layer prepared by an interfacial polymerization method so as to prepare a composite forward osmosis membrane with efficient proton transport performance. According to the invention, metal organic framework nanoparticles have ultrahigh specific surface area, high porosity and easiness in functionalization, and have good compatibility with a membrane so as to provide extra abundant proton transmission channels for the forward osmosis membrane, so that the prepared self-supporting nano-composite forward osmosis membrane has excellent ion exchange capacity, conductivity and proton transmission flux, and can effectively improve the pollutant degradation efficiency, the electricity generation amount and the water yield when being applied to an osmosis bioelectrochemical system.

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 discloses a composite cathode material of a medium / low-temperature proton transport solid oxide fuel cell, belonging to the field of fuel cells. The composite cathode material disclosed by the invention is characterized in that the novel cathode material is obtained by mutual compounding of an oxygen ion-electron conductor phase with A-site deficiency, namely Nd1.95NiO4+delta and a proton conductor phase, namely BaZr0.1Ce0.7Y0.1Yb0.1O3-delta (BZCYYb), the chemical formula of the composite cathode material is Nd1. 95NiO4+delta-BaZr0.1Ce0.7Y0.1Yb0.1O3-delta, and the mixing weight ratio of the two phases is (3: 7)-(7: 3). The composite cathode material disclosed by the invention can be used for the medium / low-temperature proton transport solid oxide fuel cell, and the two phases in the composite material have good chemical compatibility. The compounding of the Nd1.95NiO4+delta and the BaZr0.1Ce0.7Y0.1Yb0.1O3-delta can ensure that the composite cathode material has oxygen ion, proton and electron conduction properties, the three-phase interface is expanded, and the electrochemical performances are good.

The invention discloses a membrane electrode with an efficient proton transport network. The membrane electrode comprises an anode catalyst layer, a proton exchange membrane and a cathode catalyst layer; sulfonated carbon nanofibers are arranged in the cathode catalyst layer, the mass ratio of the sulfonated carbon nanofibers to a platinum-carbon catalyst is (0.1-0.4): 1, and protons are transmitted in the sulfonated carbon nanofibers. The carbon nanofibers are subjected to sulfonyl modification, so that the carbon nanofibers have a proton conduction function; and the modified nanofibers have hydrophilicity and are easy to adsorb ion resin, so that the ion resin is distributed along the fibers, the orderliness of the ion resin is enhanced, and the proton mass transfer efficiency is improved.

A high-temperature proton transport composite membrane for fuel cells is prepared by the following method: compounding ammonium polyphosphate and / or ammonium polyphosphate complex with sulfonated polyaryletherketone (sulfone) polymer solution to form proton transport Composite membrane; the mass concentration of ammonium polyphosphate or ammonium polyphosphate compound in the polymer solution is 10-95%; the polymer solution of sulfonated polyaryletherketone (sulfone) is sulfonated polyaryletherketone (sulfone) The polymer is dissolved in a polar solvent, and the volume concentration is 5-85%. The invention also provides a preparation method. The proton transport composite membrane involved in the present invention has a working temperature of 150-350°C, is a high-temperature proton transport composite membrane with high proton conductivity, good mechanical strength, alcohol resistance and processability, and is suitable for hydrogen High temperature proton transport membrane fuel cell with alcohol as fuel.

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 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 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.

The current disclosure provides a method of fabricating a perfluorosulfonated ionomer membrane with a surface having an array of a plurality of fine pillars. The pillars are fabricated by a rapid deformation of the membrane via thermal imprint lithography under appropriate temperatures and pressures. This fabrication process induces the molecular alignment of a polymer in the pillars. As a result, the main chain via C—F and C—C bonds in the pillar is controlled to reduce the proton transport resistance in the pillars. Therefore, the fuel cells utilizing the invented membrane show improved performance under low humidity.

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.