49 results about "Proton transport" patented technology

The invention discloses a catalyst for a high-temperature proton exchange membrane fuel cell as well as a preparation method and application of the catalyst. The catalyst of the high-temperature proton exchange membrane fuel cell comprises a carbon carrier and Pt nano-particles loaded on the carbon carrier, and at least part of the surface of the Pt nano-particles is coated with manganese dioxide. According to the catalyst of the high-temperature proton exchange membrane fuel cell, the Pt nano-particles are coated with the manganese dioxide, catalytic active sites of the catalyst can be protected after coating, the poisoning effect of phosphoric acid on the catalyst at high temperature is relieved, and the performance of the high-temperature proton fuel cell is improved. In addition, manganese dioxide not only can be used as a protective layer, but also can form a new proton conductor with phosphoric acid, so that a proton transmission channel of the membrane electrode under a high-temperature working condition is improved, and the performance of the high-temperature proton fuel cell is improved.

The invention provides a proton exchange membrane and a preparation method and equipment thereof.The proton exchange membrane comprises at least two membrane layers which are arranged in a stacked mode, side chain structures of perfluorinated sulfonic acid resin in the at least two membrane layers are the same, and the side chain structures of perfluorinated sulfonic acid resin in the at least two membrane layers are identical from one side of the proton exchange membrane to the other side of the proton exchange membrane. The equivalent mass of the perfluorinated sulfonic acid resin in the at least two film layers is gradually reduced in sequence; and / or the equivalent masses of the perfluorinated sulfonic acid resins in the at least two membrane layers are the same, and the molar masses of side chains of the perfluorinated sulfonic acid resins in the at least two membrane layers are sequentially increased from one side of the proton exchange membrane to the other side of the proton exchange membrane. According to the proton exchange membrane, the conductivity of the membrane layers is gradually increased from one side of the proton exchange membrane to the other side of the proton exchange membrane, so that the proton dragging capability of the cathode can be improved, the proton transmission resistance of the proton exchange membrane is reduced, and meanwhile, the stability of the proton exchange membrane is ensured.

The invention belongs to the field of biomedicine, and discloses a method and a kit for monitoring a lysosome acidification process mediated by mitochondrial-lysosome interaction. According to the method, an LYSO-PZ probe with a specific structure is used for marking cell lysosome contents, a pH rodo dye and a lysosome membrane marker sfGFP-LAMP1-mCherry are combined for monitoring the pH value and membrane positioning of the lysosome respectively, then a three-channel fluorescence image is obtained through a structural illumination microscope (SIM), and the fluorescence intensity ratio is quantitatively analyzed. In addition, the method further comprises a step of forming mitochondrial-lysosome contact (MLC) through optogenetics regulation, related protein binding is induced through blue light, fluorescence intensity changes before and after MLC formation are compared, and MLC-mediated proton transport is verified. A complete monitoring system is established for the first time, lysosome acidification can be accurately monitored, information can be obtained in multiple dimensions, and the method has important clinical application value and wide market prospects.

The invention belongs to the technical field of proton exchange membranes, and relates to a proton exchange membrane for regulating and controlling a perfluorinated sulfonic acid resin / sulfonated polyether ether ketone interface by liquid crystal ionomer grafted aramid fibers as well as a preparation method and application of the proton exchange membrane. The preparation method comprises the following steps: treating aramid fiber by plasma, grafting a liquid crystal ionomer containing a sulfonic acid group to prepare a functional reinforcer, and blending modified aramid fiber and perfluorinated sulfonic acid resin / sulfonated polyether ether ketone, and casting to form the membrane. According to the technology, through three-dimensional structure optimization, a perfluorinated sulfonic acid resin continuous proton transmission channel is constructed on the mesoscale, the density of sulfonic acid groups of sulfonated polyetheretherketone is regulated and controlled on the molecular scale, and meanwhile modified aramid fiber with the surface enriched with amide groups is introduced to serve as a third-phase reinforcement body; the sulfonated polyetheretherketone and sulfonic acid groups of a two-phase matrix form a multiple hydrogen bond network, the interfacial compatibility is optimized, and the problems of low proton conductivity of sulfonated polyetheretherketone and phase separation of sulfonated polyetheretherketone from perfluorinated sulfonic acid resin are solved. The liquid crystal ionomer synergistically optimizes the proton channel continuity, and a solution is provided for the high-performance proton exchange membrane for the fuel cell.

The application belongs to the field of biomedicine, and discloses a method and a kit for monitoring a process of mitochondrion-lysosome interaction-mediated lysosome acidification. The method is characterized in that a cell lysosome content is first labeled with a LYSO-PZ probe with a specific structure, a pHrodo dye and a lysosome membrane marker sfGFP-LAMP1-mCherry are combined to monitor the pH value and membrane localization of the lysosome, respectively, then three-channel fluorescence images are acquired through a structured illumination microscope (SIM), and the fluorescence intensity ratio is quantitatively analyzed. In addition, the method further comprises a step of optogenetic regulation of mitochondrion-lysosome contact (MLC) formation, the fluorescence intensity change before and after the formation of MLC is compared through blue light induction of related protein binding, and the proton transport mediated by MLC is verified. The application first establishes a complete monitoring system, can accurately monitor lysosome acidification, and has important clinical application value and broad market prospect.

The present invention provides a composite electrode structure comprising a proton exchange membrane, an anode catalyst layer composited to one side of the proton exchange membrane, and a cathode catalyst layer composited to the other side of the proton exchange membrane. The present application also provides a method for preparing the composite electrode structure. The composite electrode structure provided herein comprises a multilayer stack of a catalyst layer and a three-dimensional resin fiber layer, significantly reducing proton transport resistance within the catalyst layer and improving proton transport capacity.

The invention discloses a preparation method of a polypropylene cation exchange membrane, which effectively achieves the purpose of enhancing the chemical stability of the membrane, and comprises the following steps: step S1, carrying out plasma treatment on a polypropylene base material, and synchronously grafting a sulfonic acid group-SO3H and a quaternary ammonium group-N + R3 under photochemical reaction conditions; s2, mixing and dispersing the surface-functionalized polypropylene master batch and a sulfonated two-dimensional carbon material; s3, mixing the complex with an aprotic polar solvent, and forming a porous skeleton through thermally induced phase separation; s4, compounding the porous framework with cation exchange resin. The method is ingenious in conception and simple and convenient to operate, the purposes of effectively constructing a continuous proton transmission channel and increasing the ionic conductivity are achieved, a nano-channel network with low tortuosity is formed, and the purposes of proper membrane strength and flux attenuation rate are achieved.

The invention belongs to the technical field of fuel cells, and discloses a Preyssler type polyacid crystalline material with high proton conductivity, the structural formula of the Preyssler type polyacid crystalline material is [Zn4 (H2O) 8 (H7P5W30O110) (btp) 4]. 6H2O, and the asymmetric unit of the Preyssler type polyacid crystalline material comprises an independent Zn (II) ion, a quarter {P5W30} unit, two half btp ligands, two coordinated water molecules and two free water molecules. The compound is a proton conduction material with great potential, the proton transmission mechanism of the compound and the proton transmission mechanism of the composite membrane follow a jumping mechanism, and the stable three-dimensional frame structure of the compound is beneficial to large-scale commercial application of proton exchange membrane fuel cells.

This membrane electrode assembly comprises: a proton conductor (10); and a catalyst layer (20) that is provided so as to sandwich the proton conductor and that is joined to the proton conductor. Provided to the proton conductor is a recessed-and-protruding section (12) where portions of the catalyst layer penetrate a catalyst bonding surface (11) to which the catalyst layer is bonded.　In the catalyst layer, a region where the proton transport resistance increases proportionally with separation from the catalyst bonding surface is defined as a high-resistance region (HA). Furthermore, in the catalyst layer, a region where the proton transport resistance is smaller than that of the high-resistance region and the degree of increase in the proton transport resistance accompanying separation from the catalyst bonding surface is smaller than that of the high-resistance region is defined as a low-resistance region (LA). As a result, the dimensions of at least the recessed-and-protruding section are set such that the proportion of the entire catalyst layer occupied by the low-resistance region is larger than when the catalyst bonding surface is a flat surface having no recesses or protrusions.

Disclosed herein are catalytic proton transport membranes and methods of making an use thereof. The catalytic proton transport membranes comprising a two-dimensional (2D) material having a top surface and a bottom surface, wherein the top surface further comprises a catalytic material deposited thereon, wherein the membrane allows for proton transport through the membrane.

The present invention relates to a squid-derived conductive protein and a method for manufacturing same. Having a sequence partially similar to genetic information of a reflectin protein possessing a proton transport mechanism, the squid-derived conductive recombinant protein exhibits electrochemical properties corresponding to an in vivo electrical signal transmission mechanism, can be mass-produced from a transformant, can be used as a new material based on electrochemical properties, and can be formulated into various chemical formulations, thereby finding applications in a flexible electrode, an electrolyte, an active material, and the like.

The invention relates to fuel cells and electrolyzer electrodes comprising non-ionomer binders. An electrode of an electrochemical device includes a carbon-based support structure, an ion conducting material dispersed on and within the support structure, a catalyst dispersed on and within the support structure, and a non-ionomer hydrocarbon-based binder dispersed on the support structure. The ion conducting material enables proton transport across the electrode, the catalyst promotes a chemical reaction of the fuel received at the electrode, and the binder holds the electrode. The electrode may be included in an electrochemical device, such as a fuel cell.

The present disclosure provides a discretization modeling method for electro-osmotic drag effect of water conservation in a fuel cell, comprising: establishing a conservation equation of membrane water in the fuel cell, performing a discretization for a complete electro-osmotic drag effect, obtaining a discretization simulation model of the complete electro-osmotic drag effect based on results of the discretization, solving the conservation equation of membrane water to establish a discretization simulation model of electro-osmotic drag effect of water conservation in the fuel cell. The discretization modeling method for the electro-osmotic drag effect of water conservation in a fuel cell in the present disclosure can perform a discretization and a numerical calculation for a complete electro-osmotic drag effect, the discretization comprising a water conservation portion caused by a membrane water content gradient and a water conservation portion caused by a proton transport flux gradient.

The present application relates to a kind of Ce-MOF doped Nafion composite proton exchange membrane and its preparation method and purposes, the Ce-MOF doped Nafion composite proton exchange membrane includes Nafion composite proton exchange membrane and Ce-MOF;Metal site in the Ce-MOF is Ce;The amino group is contained in the Ce-MOF.By introducing Ce element, using Ce as radical quencher, effectively eliminate free radicals, reversible redox pair Ce 3+ And Ce 4+ , inhibit polymer chain chemical degradation, help to improve the durability of proton exchange membrane, improve the oxidation resistance of proton exchange membrane.Simultaneously through MOF skeleton anchoring Ce ion position, effectively solve the problem of Ce loss after long time work, while introducing amino and sulfonic acid group on Nafion chain form proton transport channel, ensure the proton conductivity of membrane.

The application discloses a kind of double-gate graphene proton transport device in-situ test system and test method under strong magnetic field, the system is double-layer structure, comprising: inner rod, for placing double-gate graphene proton transport device, the inner rod is integrated with temperature control system, for realizing 100mK to 300K variable temperature test environment;Outer rod, it is set in the outer portion of the inner rod, for independently controlling the vacuum or specific atmosphere environment where the device is located.The application also provides a test method, the assembled system is placed into magnetic field environment, scanning is carried out in predetermined magnetic field intensity range, and temperature is controlled to change between 100mK to 300K;Through the first electrical measurement unit and second electrical measurement unit, the curves of proton current and electron current change with magnetic field, temperature and gate voltage are recorded simultaneously.By unique device structure design and system integration scheme, it provides a powerful tool for studying atomic scale proton transport behavior under extreme multi-physical field coupling environment.

The present application relates to a kind of proton exchange membrane and its preparation method, including first exchange layer, intermediate layer and second exchange layer, intermediate layer includes support layer, ion exchange material filled in support layer and water hole, equivalent weight Ew of ion exchange material is not higher than 1600, the thickness H of proton exchange membrane in dry state 干 Not higher than 17 μm, the compactness I of proton exchange membrane is 0.15-0.65, the mass m of support layer per unit area in dry state P 2-10 g;The thickness h of support layer in dry state p 2-8 μm.The existence of water hole reduces water permeation resistance, reduces the difficulty of proton membrane forming proton transport channel, reduces the possibility of water flooding under high humidity condition, the possibility of proton transport channel circuit breaking under high temperature and low humidity condition, ensures high proton conductivity;In addition, the existence of water hole provides ion exchange material swelling deformation space, thereby improving the dimensional stability of proton membrane.

The invention discloses a method for improving durability of a membrane electrode by using imidazolium ionic liquid. The method comprises the following steps: dispersing a catalyst into anode and cathode catalyst slurry by using dispersion liquid; uniformly spraying the slurry on the two sides of the proton exchange membrane respectively to form CCM1; uniformly mixing an imidazole derivative solution with an organic solvent, spraying the mixture on the two sides of the CCM1 again, and freezing and storing to form CCM2; and carrying out hot press molding on the CCM2 and the diffusion layer to prepare the membrane electrode assembly. According to the mode, the added ionic liquid serves as a protective layer, Pt in contact with the ionic liquid is effectively protected, the surface of the Pt is prevented from being attacked by oxygen-containing groups, and the oxidation and curing phenomena of platinum are reduced; the ionic liquid is deeply diffused into micropores and smaller mesopores in the HSA in a freezing manner, an effective proton transmission means can be provided for Pt, and protons can efficiently reach active sites of platinum under the condition of high current density, so that the catalytic efficiency is improved, and the whole membrane electrode keeps higher activity and durability.

The present invention belongs to the technical field of fuel cell proton exchange membrane materials and relates to a block sulfonated polybenzimidazole and a preparation method thereof. This block sulfonated polybenzimidazole is made from aromatic dicarboxylic acid, sulfonated 4,4-dicarboxyl diphenyl ether and 3,3-diaminobenzidine. Amino-terminated and carboxyl-terminated prepolymers are first synthesized separately, and then block polymerization is carried out. The block copolymer can form a microphase-separated structure in the membrane, thereby enhancing the internal connectivity of the block, helping to form a continuous proton transport channel, which is beneficial to proton conduction. Sulfonic acid groups are introduced into PBI through covalent bonds to achieve rapid proton conduction and solve the acid leakage problem well. The presence of ether bonds in the main chain of the molecule can increase the flexibility of the polymer chain, which is beneficial to improving the solubility of PBI and the toughness of the proton exchange membrane. At the same time, the introduction of sulfone groups allows the membrane to maintain good mechanical properties when the water absorption content is high.

This invention discloses an aqueous zinc-ion battery electrolyte containing aminopyrine as an additive. The electrolyte comprises a water-soluble zinc salt, deionized water, and an additive, aminopyrine, at a concentration of 1-20 mmol / L. The aminopyrine of this invention reacts with H3O through its sulfonic acid group. + The formation of a strong hydrogen bond network significantly suppresses proton transport, which synergistically achieves triple suppression of hydrogen evolution reaction, corrosion and dendrite growth, ultimately guiding uniform zinc deposition and improving battery cycle stability.

This invention discloses a method for preparing a non-fluorinated composite proton exchange membrane. The method uses sulfonated polyether ether ketone (PEEK) as the matrix and incorporates two specific sulfonated covalent organic framework materials. The addition of the sulfonated covalent organic framework forms a continuous hydrogen bond network and highly efficient proton transport channels within the membrane, significantly improving proton conductivity. The composite membrane achieves a proton conductivity of up to 0.41 S / cm at 80°C, approximately three times higher than the unmodified matrix. Simultaneously, the rigid structure of the covalent organic framework effectively enhances the membrane's mechanical strength, increasing its tensile strength to 75 MPa, achieving a synergistic enhancement of proton conductivity and mechanical properties. The non-fluorinated composite proton exchange membrane prepared by this invention exhibits a stable composite membrane structure and excellent overall performance, making it suitable for applications such as proton exchange membrane water electrolysis for hydrogen production.

The invention belongs to the field of photocatalytic preparation of hydrogen peroxide, and provides a preparation method and application of a pyrenyl conjugated organic polymer catalyst which is applied to photocatalytic preparation of hydrogen peroxide and contains a dinitrogen heterocyclic coupling proton transport site. The pyrenyl structure and the dinitrogen heterocyclic ring are combined in a covalent bond mode, a stable D-A structure is formed, and a proton transmission channel is constructed. Furthermore, carboxyl functional groups can be introduced, the hydrophilic performance of the catalyst is directionally modified, photo-induced electrons and holes are efficiently utilized, the utilization rate of photocatalytic energy is increased, the photocatalytic performance of the obtained material is further improved, and the highest yield can reach 7.32 mmol g <-1 > h <-1 >.

The present invention provides an electrode catalyst layer, a membrane electrode assembly, and a polymer electrolyte fuel cell that can enhance power generation performance over a wide load range by suppressing catalyst poisoning and improving proton transport using ionomers. [Solution] The electrode catalyst layer 12C of the air electrode includes a catalyst support 20 which is a porous carbon support 21 supporting a catalyst substance 23, and a polymer electrolyte 24, and the ECSA ratio, which is the ratio of ECSA at a relative humidity of 30% to ECSA at a relative humidity of 100%, is 0.55 or more and 0.65 or less. The catalyst support 20 includes a first catalyst support 20a which has an ECSA ratio of 0.5 or less when used alone as the catalyst support 20 included in the electrode catalyst layer 12C, and a second catalyst support 20b which has an ECSA ratio of 0.7 or more when used alone as the catalyst support 20 included in the electrode catalyst layer 12C.

The disclosure of the application provides a membrane design encompassing three main considerations; (1) employing 2D nanosheets as proton-permeable building blocks to facilitate through-membrane proton transport; (2) assembling 2D nanosheets to form 2D channels, capable of confining the proton conductor to thereby prevent loss of the proton conductor, or to prevent physical or chemical degradation of the proton conductor under the conditions in which the membrane may be exposed in its application(s); and (3) incorporating proton conductors to occupy the intersheet spaces forming the 2D channels, and / or incorporating proton conductors to form at least part of the inner surfaces of the 2D channels, enabling intersheet proton transport while blocking hydrogen gas molecules, thereby providing membranes with ultrafast proton conducting pathways due to synergistic proton transport, with high retention of the proton conductor achieved through nanoconfinement in 2D channels.

This invention discloses a polyaromatic hydrocarbon for preparing proton exchange membranes, its preparation method, and its application, belonging to the field of proton exchange membrane material preparation technology. This invention solves problems such as low molecular weight, uneven sulfonation, chain breakage in sulfonated polymers, poor dimensional stability, and poor mechanical properties in proton exchange membrane materials. Using aromatic monomers and 3,5-difluorotrifluoroacetophenone as raw materials, this invention employs a superacid-catalyzed Friedel-Crafts hydroxyalkylation reaction to prepare fluorinated aromatic polymers. Then, sulfonic acid groups are introduced onto the fluorinated aromatic polymers via nucleophilic substitution followed by sulfonation, preparing monosulfonated and disulfonated fluorinated sulfonic acid polymers. Proton exchange membranes are then prepared using these polymers as raw materials. The significant polarity difference between the hydrophobic fluorinated benzene ring side groups and the hydrophilic disulfonic acid groups in this invention is more conducive to forming a microphase separation structure and constructing continuous proton transport channels. Simultaneously, the hydrophobic fluorinated segments effectively suppress membrane swelling and improve its dimensional stability.

This invention provides a method for preparing an anode catalyst layer for PEM water electrolysis. By doping additives into the catalyst layer, not only are proton transport channels between catalysts constructed, reducing the proton transport impedance between catalysts and improving the electrochemical reaction rate, but the additives also disperse the catalyst, exposing more active sites, increasing catalyst utilization, and improving the performance of PEM water electrolysis. Furthermore, by separating the additive slurry and the anode catalyst slurry and using dual-channel ultrasonic spraying to control the feeding of each slurry, the layered composition of the catalyst layer can be efficiently and quickly adjusted to prepare a catalyst layer with the desired structure and composition distribution, eliminating the need for multiple slurry preparations and sprayings. This process offers high flexibility and a short cycle time. By preparing a catalyst layer with gradients in catalyst loading and sulfonated silica content through layering, not only is catalyst utilization improved, but also efficient electron and proton transport channels are constructed, improving the water electrolysis rate.

This invention provides a ceramic proton exchange membrane for microbial fuel cells and its preparation method, comprising the following steps: mixing clay, an inorganic modifier, and an organic modifier to obtain a solid powder; the inorganic modifier is alumina and silicon dioxide, and the organic modifier is selected from one or more of wheat flour, biochar powder, straw powder, and bamboo powder; the solid powder is ball-milled, granulated, pressed into sheets, and calcined to obtain the ceramic proton exchange membrane. This invention addresses the problems of poor mass transfer performance and low power generation performance of traditional pure clay ceramic membranes. Using clay as the matrix material, and through specific inorganic and organic modifiers, the pore structure of the material is adjusted. A novel ceramic proton exchange membrane is then prepared through ball milling, granulation, pressing, and calcination. This membrane has low manufacturing cost, good proton transport efficiency, and extremely low internal resistance. When applied to microbial fuel cells, it can achieve higher output voltage and more stable power generation performance.

The invention belongs to the technical field of electrocatalysts and fuel cells, and discloses a method for improving the alkaline hydroxide performance of a platinum-carbon electrocatalyst by constructing a proton transmission channel and the platinum-carbon catalyst. According to the method, the platinum-carbon catalyst with a proton transmission channel is obtained by modifying the platinum-carbon catalyst with conjugate alkali of weak acid aiming at an electro-catalytic alkaline hydroxide reaction, so that the electro-catalytic hydroxide catalytic performance of the platinum-carbon catalyst under an alkaline condition is improved. The constructed platinum-carbon catalyst with the proton transmission channel shows high catalytic activity, strong stability and CO poisoning resistance in an electro-catalysis alkaline hydroxide reaction.

The invention provides a proton track and dose simulation method based on prevention capability and random scattering. The method comprises the following steps: S1, reading proton prevention capability, continuous moderated approximate range and detour factor data of a target material; s2, generating a self-adaptive scattering step length suitable for the current energy by using the basic radiation parameter table; s3, optimizing empirical parameters in the scattering angle correction factor by taking the detour factor as a criterion; s4, calculating a scattering angle standard deviation, and generating a single scattering angle conforming to Gaussian distribution; s5, calculating a single scattering track and energy loss of the protons; s6, iteratively simulating single scattering and energy loss calculation until the kinetic energy of the proton is zero or the proton passes through the target material; and S7, outputting a proton complete track and a dose distribution curve. According to the method, the proton blocking threshold curve and the scattering theory are combined, the correctness of the particle scattering statistical behavior is ensured by taking the detour factor as the criterion, and rapid simulation and accurate calculation of the proton transport track and the radiation dose are realized.

The present invention relates to the field of proton exchange membrane fuel cell technology, and proposes a proton exchange resin with multiple proton conduction centers and a method for preparing the same. The proton exchange membrane of the present invention has a perfluorinated backbone structure, with side chains containing sulfonic acid, phosphonic acid, and sulfonimide groups. The resulting multiple active centers increase ion exchange capacity, enhance proton conductivity, and ensure the proton transport capacity of the proton exchange membrane at low humidity. Furthermore, the benzene ring structure provides significant steric hindrance, raising the glass transition temperature, enabling the polymer to achieve both proton conductivity and thermal stability.

This invention discloses a method and system for real-time pH control and stabilization in online column separation, belonging to the field of ion exchange chromatography separation technology. The method includes: applying a proton perturbation signal to the chromatographic column and detecting its elution response signal to obtain a parameter spectrum characterizing the dynamic buffer capacity of the chromatographic column; inputting the parameter spectrum and the target pH gradient into a physical transport model based on convection, diffusion, and adsorption coupling equations; the physical transport model outputs a pre-distorted pH gradient program to compensate for the dynamic buffer capacity characteristics; and based on the fluid ratio requirements defined by the pre-distorted pH gradient program and varying over time. This allows for the acquisition of dynamic buffer capacity characteristics through proton perturbation testing and the construction of a pre-distorted pH gradient program. Combined with closed-loop iterative optimization, this effectively counteracts the interference of the chromatographic column's dynamic buffer capacity on proton transport, ensuring that the pH curve of the post-column elution accurately matches the target linear gradient and eliminating pH nonlinear distortion and plateau problems.