33results about How to "Add three-phase interface" patented technology

The invention discloses a catalyst using a metal oxide as a carrier for fuel cells and application thereof. The catalyst is characterized in that: the metal oxide as the carrier has catalytic oxygen evolution function simultaneously, and a noble metal with catalytic oxygen reduction function is supported on the metal oxide; the nanoparticles of the noble metal are highly dispersed on the surface of the metal oxide as the carrier, wherein the mass fraction of the noble metal is 2 to 70 percent in the catalyst. The catalyst alone or the catalyst mixed with platinum black in a certain proportionis applied to bifunctional oxygen electrodes for utilized regenerative fuel cells. Compared with the traditional mechanical mixture of platinum black and an oxide from catalytic oxygen evolution reaction, the fuel cell and water electrolysis performances of the cells are greatly improved, and the performance is close to that of a commercial Pt / C catalyst in fuel cells. The catalyst is applied to fuel cell oxygen electrodes to effectively solve the problems that the activity of the catalyst is deceased by the corrosion of the carrier.

A preparation method of composite sulfur cathode material and application thereof in all-solid-state lithium-sulfur batteries belong to the technical field of preparation of battery materials. The preparation method comprises: dispersing sulfur material, solid electrolyte and a conductive agent in a solvent to reach a solid content of 30-70%, performing ball milling, mixing well, and drying to obtain mixture I; dispersing a conductive agent in a solvent to reach a solid content of 30-70%, adding the resultant, accounting for 5-10% of the mixture I by mass, into the mixture I, performing ball milling, mixing well, and drying to obtain mixture II; adding a solvated ionic liquid, accounting for 5-10% of the mixture II by mass, into the mixture II, grinding with a mortar, and mixing well to obtain the composite sulfur cathode material. The composite sulfur cathode material is applicable to all-solid-state lithium-sulfur batteries. It is provided herein that little solvated ionic liquid compatible with the components is added to fill gaps of solid particles; in addition, the solvated ionic liquid has ionic conductivity, which helps further enhance an ionic conductive pathway in the sulfur material in an electrode.

The invention discloses a preparation method of a graphene-ceramic composite material. The preparation method comprises the following steps of: (1), penetrating cerate (or zircon salt), auxiliaries and graphene oxide through alcohol dissolving auxiliaries, ultrasonically dispersing the materials uniformly for co-decomposing into metal oxides to obtain a composite material; (2), adding organic adhesive solvent to the graphene-metal oxide composite material for sufficiently mixing and grinding; pressing the mixture into a strip-shaped composite sample by adopting a dry-press process, placing the composite sample in a vacuum tube furnace; and controlling the sintering condition by ventilating a gas mixture of a certain proportion, cooling to the room temperature to obtain the graphene-ceramic composite material. The preparation method of the graphene-ceramic composite material disclosed by the invention can be used for improving the dispersibility and cycling stability of ceramic oxide particles, increasing a three-phase interface among the ceramic oxide particles and improving the electrochemical activity of the composite material, so that the ceramic material has the advantages of being low in density, high in strength, excellent in oxidation resistance, thermal scouring resistance, corrosion resistance and the like.

The invention relates to a nickel-based composite anode material of a solid oxide fuel cell and an application thereof. The composition of the composite anode material can be expressed by Ni1-x-yMgxAlyO1 plus 0.5y, wherein x varies from 0.01 to 0.2 and y ranges from 0.001 to 0.2. The composite anode material is compounded with an electrolyte material to prepare an anode, and the weight percentage of magnesium oxide and aluminium oxide modified nickel-based composite oxide material is 30-70 percent. During practical application, the composite anode is put into use after reduction, the reduced anode contains the electrolyte material, metal micron-nickel and nano particles, magnesium oxide, aluminium oxide and a composite oxide formed by magnesium oxide, aluminium oxide and nickel oxide. The novel composite anode can be used for flat-plate-type, tubular, honeycomb-type and oblate-tube-type solid oxide fuel cells.

The invention discloses a nano composite cathode for a high-temperature solid oxide electrolytic tank as well as a preparation method and application thereof. The structure of the nano composite cathode is a YSZ skeleton which is prepared by adopting PMMA as a pore forming agent and has micro-pores, an LSFM-GDC (M = Mn, Fe, Ni) composite nano electrode catalyst is prepared by adopting a co-impregnation method, and the nano composite cathode for the high-temperature solid oxide electrolytic tank is prepared after roasting. The high-temperature solid oxide nano composite cathode prepared by theinvention is suitable for high-temperature CO2 electrolysis and CO2-H2O co-electrolysis; good electrochemical performance is achieved on high-temperature CO2 electrolysis and Co2-H2O co-electrolysis,the performance and the operation stability of the solid oxide electrolytic tank can be remarkably improved, and good development prospects are achieved. The method is suitable for the field of high-temperature carbon dioxide reduction, the field of clean carbon fuel preparation and the technical field of energy and fuel cells.

The invention discloses a preparation method of a nanofiber SSC based cathode material, and relates to a preparation method of a cathode, aiming to solve the technical problem of large interfacial polarization impedance of the cathode prepared by the method. The composite cathode comprises an electrolytic strip, an anode or a cathode as support bodies, and the one-dimensional nanofiber SSC cathode material Sm(1-x)SrxCoO(3-delta) adhered on the support bodies, wherein electrolyte nanoparticles are adhered on the SSC fiber. The preparation method of the composite cathode comprises the steps of soaking a one-dimensional nanofiber SSC cathode framework in a small amount of electrolyte precursor liquid by multiple times; and sintering to obtain the composite cathode based on the one-dimensional nanofiber SSC material. The composite cathode provided by the invention can be used in a medium-and-low-temperature solid oxide fuel battery.

The invention discloses a preparation method of a self-humidifying ordered polymer membrane electrode, belonging to the technical field of membrane electrode preparation. An ordered ion exchange polymer nanotube array prepared through the method is fused together with a polymer membrane and is provided with highly ordered ion, electron and gas mass transfer channels, and electrochemical three-phase reaction interfaces are distributed in the outer surfaces of polymer nanotubes with water storage functions, so that a high-efficiency energy conversion process can be carried out in a self-humidifying manner. A catalyst in a nanoparticle or microparticle state is bonded on the surface of the ion exchange polymer nanotube array to form a catalysis layer and is relatively high in specific surface area and catalytic activity, so that the three-phase reaction interfaces of the membrane electrode are greatly added, the electrochemical polarization, the ohmic polarization and the concentration polarization of the electrode are reduced, the energy conversion efficiency is improved, and the reaction speed is increased. According to the preparation method, a membrane electrochemical reactor system is expected to be remarkably simplified, the energy conversion efficiency and the stability are improved, and the operation life is prolonged.

The invention relates to proton exchange membrane fuel cell slurry capable of improving dispersity of ionomers in catalyst slurry and a preparation method thereof. The method comprises the steps that a fractional step method is adopted, firstly, a catalyst and water are added and dispersed to prepare catalyst turbid liquid, then alcohol and a perfluorosulfonic acid resin solution are dispersed to prepare an ionomer solution, and finally, the ionomer solution is divided into three parts, sequentially the three parts are added into the catalyst turbid liquid, and sequentially dispersed to prepare the proton exchange membrane fuel cell catalyst slurry. Compared with the prior art, the method has the advantages that non-adsorbed ionomers in the catalyst slurry can be reduced, so that the ionomers are more uniformly adsorbed on the catalyst, meanwhile, the microstructure of an interface of a cluster catalyst/ionomer on a catalyst layer can be improved, a three-phase interface is increased, and the performance of the fuel cell is improved; in addition, the method is simple to operate, the preparation process is easy to control, and the prepared slurry is suitable for preparing roll-to-roll high-flux membrane electrodes for slit coating, brush coating and the like.

The invention relates to a nano-cerium oxide-based composite material with a flower-like structure, which is a powder material with an average particle diameter of 100nm-100μm, and flakes with a thickness of 2-500nm grow on each particle, showing a flower-like structure. The cerium oxide-based composite material is cerium oxide and selected from lanthanum oxide, copper oxide, zirconia, titanium oxide, aluminum oxide, magnesium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, vanadium oxide, tungsten oxide, Binary or ternary composite oxide formed by one or two oxides of molybdenum oxide, silicon oxide, zinc oxide, gadolinium oxide, yttrium oxide, spectrum oxide, samarium oxide, scandium oxide, europium oxide, erbium oxide, and ytterbium oxide The molar ratio of oxides other than cerium oxide to cerium oxide is 0.001-0.5:1. The composite material has a very large specific surface area and can be used as an anode material of a solid oxide fuel cell or a support body of a noble metal catalyst.

The invention discloses a three-dimensional graphic surface proton exchange membrane for a fuel cell as well as a preparation method and application of the three-dimensional graphic surface proton exchange membrane. The preparation method of the proton exchange membrane comprises the steps of a 3D printing process and a hot stamping process. The 3D printing process is used for printing a precise pattern hot stamping mold, and the hot stamping process is used for preparing a high-specific-surface-area proton exchange membrane with a three-dimensional pattern. A high-hardness polymer material is adopted as a raw material of the hot stamping mold, and the defects of a traditional preparation process based on a metal mold are overcome; and the hot stamping process adopts an upper buffer layer structure and a lower buffer layer structure, and has the characteristic of one-step stamping forming. The prepared and formed proton exchange membrane with the surface pattern structure has a high specific surface area, a rapid proton transmission channel can be provided, the three-phase boundary of a fuel cell membrane electrode can be expanded, so that the output performance of the fuel cell is improved; and the proton exchange membrane with the surface pattern structure can effectively improve water management of a hydrogen fuel cell, and construction of the proton exchange membrane fuel cell with high performance and long service life is realized.