16results about How to "Improve electrode performance" patented technology

A proton exchange membrane electrolytic cell membrane electrode structure with non-uniform load distribution under an anode catalyst layer rib and a flow channel area is characterized in that different load catalysts are sprayed on the area under the anode catalyst layer rib and the flow channel area of a membrane electrode in different areas, so that the whole catalyst layer is in non-uniform load distribution to improve the reaction performance of the membrane electrode; and gradient distribution of the catalyst is formed to improve membrane electrode performance. The thought of non-uniform load distribution of the under-rib area and the runner area of the membrane electrode catalyst layer designed by the invention not only can be used for preparing the membrane electrode of a proton exchange membrane electrolytic tank, but also can be used in the fields of the catalyst layer of a proton exchange membrane fuel cell and the like in which metal nanoparticles are deposited on the two sides of the membrane to improve the reaction performance and the like.

The invention provides a sodium battery core-shell type hard and soft interwoven carbon layer coated metal oxide negative electrode material, which is prepared from the following raw materials: an asphalt material, a hard carbon precursor, a metal oxide precursor and template salt, and the mass ratio of the asphalt material to the hard carbon precursor to the metal oxide precursor to the template salt is 1: (0.5-2): (1-2): 4; the core-shell type negative electrode material comprises a metal oxide and a hard-soft interwoven carbon layer coated on the surface of the metal oxide. On the other hand, the invention also provides a preparation method of the core-shell type hard-soft interwoven carbon layer coated metal oxide negative electrode material for the sodium battery, namely a one-step pyrolysis method. The problems that in the prior art, the defect that a metal oxide negative electrode is prone to pulverization or poor in conductivity can only be singly improved, and meanwhile, the formula is complex, the cost is high or the environment is polluted are solved, the defects that the electrode is prone to pulverization and poor in conductivity are synchronously improved, and the service life of the electrode is prolonged. And the performance of the electrode is improved to the maximum extent.

The invention discloses an electrochemical system and method for treating nitrogen-containing organic wastewater based on a double-sided cathode. The electrochemical system comprises a reactor, an aeration device, a power supply, an anode and the double-sided cathode, and the double-sided cathode is prepared by loading a functional catalyst through a double-sided rolling coating process. Under the condition of not adding exogenous iron ions and H2O2, the side, with the electro-catalytic degradation function, in the double-sided cathode generates. OH in situ through the oxygen reduction reaction of two electrons and the electro-Fenton process, so that efficient degradation of organic pollutants is realized; meanwhile, NO3 <-> can be converted into N2 to be discharged under the synergistic effect of the sides, with the denitrification function, of the DSA and the double-sided cathode, organic pollutants and total nitrogen are synchronously removed, the denitrification function and the electrocatalytic degradation function are integrated in the single cathode, the device is more compact and efficient, the current efficiency and the mass transfer efficiency are improved, and the device is suitable for large-scale popularization and application. The complexity and the occupied area of the system are reduced, and the energy consumption and the operation cost are reduced.

The invention relates to a multi-gradient positive electrode and a preparation method thereof, and an all-solid-state battery and a preparation method thereof. Wherein the multi-gradient positive electrode comprises a current collector, a high electron channel layer and a high ion channel layer which are arranged in sequence, and the mass ratios of positive electrode active materials in the high electron channel layer and the high ion channel layer are the same; the mass ratio of the conductive agent in the high electron channel layer is higher than the mass ratio of the conductive agent in the high ion channel layer; and the mass ratio of the solid electrolyte in the high electron channel layer is lower than the mass ratio of the solid electrolyte in the high ion channel layer. The mass ratio of the positive electrode active material in the positive electrode is kept, and the component gradient of the electrode is constructed through the content change of the conductive agent and the solid electrolyte, so that the optimized distribution of the electrode components is realized, the contact between the solid electrolyte and the active material is increased, and the high energy density is kept; therefore, the solid battery gives consideration to both energy density and rate capability, and the cycling stability and the capacity retention ratio of the solid battery are improved.

The preparation method comprises the following steps: firstly, obtaining a porous metal conductive thin layer by adopting a metal powder pre-forming strategy, constructing a conductive layer network through tightly connected metal particles, enhancing the conductivity of a catalytic layer, and carrying out a rear noble metal loading process to obtain the low-iridium oxygen evolution membrane electrode for the proton exchange membrane water electrolyzer. Precious metal is enriched on the surface of the porous metal conductive thin layer, the characteristics of high diaphragm-oriented iridium loading capacity and low diaphragm-far loading capacity are formed, the problem that rear-layer catalyst active ingredients far away from a proton exchange membrane in a catalyst layer are difficult to utilize is solved, and the utilization rate of iridium is increased conveniently. In addition, the thickness of the prepared porous metal conductive thin layer is thinner and more uniform than that of an existing catalyst layer, a proton conductive polymer can not be used, meanwhile, the efficient water vapor transmission capacity is guaranteed, the overall efficiency of a membrane electrode is improved, and the cost is reduced.

The invention discloses a lithium battery, comprising a battery shell, a battery liquid, a positive electrode group row, a negative electrode group row and an indium selenide material. The battery liquid is arranged in the battery shell, a plurality of positive electrode substrates arranged side by side are arranged on the positive electrode group row, a plurality of negative electrode substrates arranged side by side are arranged on the negative electrode group row, the positive electrode group row and the negative electrode group row are immersed in the battery liquid, the positive electrode substrates and the negative electrode substrates are arranged alternately, the indium selenide material is coated on the surface of the positive electrode group row, the positive electrode substrates are arranged side by side on the positive electrode group row, and the negative electrode substrates are arranged on the negative electrode group row, so that the positive electrode substrates and the negative electrode substrates can be extended and arranged according to the size of the battery, so that the battery capacity can be improved. By coating the indium selenide material on the positive electrode group row, the indium selenide material improves the conductivity and the movement of electrons for the positive electrode, thereby enhancing the electrode performance of the battery.

The present application relates to the technical field of lithium secondary battery materials, and in particular to an intermediate structure and preparation method, a lithium secondary battery electrode and preparation method. The intermediate structure is used to prepare lithium secondary battery electrodes on one side and / or both sides, and the preparation method of the intermediate structure includes the following steps: composite film materials on one side and / or both sides of a substrate, and form a through hole in the film material, and the central axis of the through hole is perpendicular to the plane of the substrate; wherein the substrate is a conductive substrate, and the film material is a flexible polymer film; grow a conductive material in the through hole to form a one-dimensional columnar structure perpendicular to the substrate in the through hole; remove the film material to obtain the intermediate structure. The film material used in the preparation method of the intermediate structure when synthesizing the template is a flexible polymer film, which not only has the advantage of low manufacturing cost, but also its soft characteristics enable it to be curled and made into a coil to achieve mass production, which is convenient for large-area synthesis of the template.

The invention relates to a chlorine-resistant electrode with a four-dimensional frame structure for hydrogen evolution of a high-current proton exchange membrane (PEM) tank. The chlorine-resistant electrode is mainly characterized by high brine electrolysis capacity. According to the electrode, a polyarylether high polymer material with a side chain containing a benzimidazole group is adopted as a base membrane, and a platinum ion injected cathode catalyst and a carbon nanotube enhanced gas diffusion layer are combined. According to the anode, an in-situ growth technology is adopted, a flexible three-dimensional organic metal framework composed of a rhenium-praseodymium metal core and a hydrogen bond ligand is constructed, and a dynamic four-dimensional structure is formed under the action of an electric field. Through derivation treatment, graphene surface modification and electrochemical stabilization treatment, the chlorine corrosion resistance and stability of the electrode are remarkably improved. The electrode is novel in structure, can stably and efficiently separate oxygen and assist in hydrogen separation under high current density, has excellent electrochemical performance and long-term operation stability, and is suitable for the new energy field of PEM water electrolyzers and the like.

The application discloses an air electrode and application thereof, and belongs to the field of solid oxide batteries. The air electrode is formed by sintering an air electrode precursor in a CO2 atmosphere, and is a composite electrode of microparticles and nanoparticles. The size of the nanoparticles is 10-100 nm, the size of the microparticles is 0.5-2 microns, and the nanoparticles are uniformly dispersed on the surface of the microparticles. The composition of the air electrode precursor is Ba 1‑x N x Co 1‑m‑n Fe m M n O 3‑d , 0 < x < 0.5, 0 < n < 0.2, 0 < m < 0.3, 0 < d < 0.5, N is one or more than two of Sr, Mg, Ca, K and Na, and M is one or more than two of Sc, Zr, Nb, Ce, Y and Yb. The air electrode has excellent oxygen reduction and oxygen evolution reaction activity, and shows outstanding electrochemical performance in fuel cell power generation, hydrogen production by water vapor electrolysis and synthetic gas preparation by electrolysis.

This invention belongs to the field of new energy fuel cell technology, and specifically relates to an anode catalyst with anti-reverse polarity, its preparation method, slurry, and fuel cell. The catalyst includes a support and a Pt-Ru alloy and IrO2 supported on the support, wherein the support is a carbon material support; the particle size of the anti-reverse polarity anode catalyst is 3-5 nm. Addressing the technical deficiencies of existing anti-reverse polarity anode catalysts, this invention proposes an improved anti-reverse polarity anode catalyst. This catalyst uses a carbon material support with superior conductivity and mass transfer capacity compared to metal oxide supports such as TiO2, ZrO2, WO3-Mn, and Nb-TiO2. IrO2, which has high anti-reverse polarity performance, is co-supported with the metal active component Pt-Ru alloy on the carbon material support. The resulting anti-reverse polarity anode catalyst, when applied to a fuel cell, exhibits a reverse polarity time of 171 min and an electrode performance of 1.40 A / cm² after reverse polarity. 2 In addition, this anode catalyst also exhibits excellent resistance to CO poisoning.

The present disclosure relates to the field of battery production device technologies, and more particularly, to an oven and a battery assembly line production device. The oven at least includes a first oven unit (10), a second oven unit (20), a third oven unit (30), and a fourth oven unit (40) that are sequentially connected in series in a conveying direction (x) of the electrode plate (P). Based on drying physical characteristics of the electrode plate (P), the first oven unit (10) and the third oven unit (30) are internally provided with air nozzles (200) and infrared heaters (300) for drying the electrode plate (P) by hot air and infrared rays. The second oven unit (20) and the fourth oven unit (40) are internally provided with the air nozzles (200) for drying the electrode plate (P) by hot air. In this way, a preheating and heating of the electrode plate (P) can be realized in the first oven unit (10), and a constant-speed drying of the electrode plate (P) can be realized in the second oven unit (20). A reduced-speed drying of the electrode plate (P) can be realized in the third oven unit (30) and fourth oven unit (40). Therefore, the floating amount of adhesives and a residual amount of plasticizer in the electrode plate (P) can be reduced, and a quality of the electrode plate (P) can be guaranteed while increasing a drying speed, which reduces safety risks.

This application relates to the field of electrocatalysts and their preparation technology, specifically to a phosphorus-doped cobalt-molybdenum alloy electrode, its preparation method, and its application. This application solves the problem of low Faradaic efficiency and yield in existing electrocatalytic conversion of nitrate to ammonia. The catalyst for nitrate-to-ammonia reduction with a nanosheet structure obtained by phosphating a sample prepared from a Co and Mo composite exhibits excellent Faradaic efficiency and yield in nitrate-to-ammonia reduction. Test results show that the prepared P-CoMo / NF nanoalloy catalyst achieves an ammonia yield as high as 13700.49 μg h⁻¹ in a mixed solution of 1 mol / L KOH and 0.1 mol / L KNO₃ at -0.5 V vs. RHE. ‑1 cm ‑2 The Faraday efficiency remained at 91.69%. Furthermore, the ammonia yield and Faraday efficiency remained stable over 10 cycles at -0.5V vs. RHE.

The invention relates to a membrane electrode material based on a composite structure anode catalyst layer and preparation and application of the membrane electrode material. Compared with a membrane electrode with a traditional structure, the membrane electrode with the composite structure anode catalyst layer has the advantages that the dosage of precious metal iridium in a PEM electrolytic bath is reduced, the hydrogen content in anode oxygen is reduced, and the service life of the membrane electrode is prolonged; and the utilization rate of the catalyst in the anode catalyst layer is also improved, so that the performance of the electrolytic cell is improved, and the stability is improved.

A first surface (23a) of a separator (23) for an electrode assembly includes a first passage region (231) and a first blocking region (232). The first blocking region (232) is formed by spraying or scraping an insulating material on edge regions on two sides of the first surface (23a) in a first direction X, the first direction X is perpendicular to an extension direction of the separator (23), and the first passage region (231) is the region on the first surface (23a) except the first blocking region (232). The first passage region (231) is configured for passage of ions from an electrolyte, and the first blocking region (232) is configured to block the ions from the electrolyte.

The invention provides a preparation method of a lithium ion battery negative electrode material. The method comprises the following steps: preparing an MXene material and CoNi-MOF; and synthesizing the MXene material and the CoNi-MOF into the negative electrode material of the lithium ion battery. The obtained lithium ion battery negative electrode material can be used as a lithium ion battery negative electrode material, the cycling stability of the battery is improved, and the cycling life of the battery is prolonged; when the material is used as a lithium ion battery negative electrode material, the lithium ion transmission path is shortened, and the material conductivity is improved; the prepared lithium ion battery has the advantages of high stability, long cycle life, high rate performance, simple preparation process, cheap and easily available raw materials, low cost, environmental friendliness and the like, and can effectively meet the actual application requirements of the high-energy-density lithium ion battery.

The invention discloses a partition plate for a bipolar electrode water electrolysis hydrogen production device and a manufacturing method. The partition plate comprises nickel foil and foamed nickel layers attached to the two side faces of the nickel foil in the assembling process. Meanwhile, during assembly, an insulating film is fixed on the foamed nickel layer in a stacking manner; the manufacturing method comprises the following steps: preparing slurry containing the active material, the binder and the conductive agent through ball milling; foamed nickel is placed in a funnel, the surface of the foamed nickel is evenly coated with the slurry, and the slurry is sucked into micropores of the foamed nickel under negative pressure suction of a pump; after drying, the foamed nickel loaded with the active material is embedded into a customized steel mold, and the steel mold is fed into a hydraulic machine to be pressed to obtain a foamed nickel layer; in the assembling process, two foam nickel layers are taken, and a nickel foil is clamped between the two foam nickel layers to form a partition plate. By using the solid ECPBs without using a diaphragm, the purpose of saving the cost can be achieved, and meanwhile, the resistance caused by the diaphragm can be reduced, and the electrode performance can be improved.