48results about How to "Increase the three-phase reaction interface" patented technology

The invention relates to a method for preparing a catalytic layer structure of a proton exchange membrane fuel cell. The method comprises the following steps of: (1) adding carbon powder and an electrolyte resin solution to isopropanol to obtain mixed liquid, carrying out ultrasonic treatment to uniformly mix the mixed liquid, then dispersing the mixed liquid into a proton exchange membrane, and carrying out drying treatment to form a carbon powder layer on the membrane so as to obtain the proton exchange membrane with the carbon powder layer; (2) dipping the proton exchange membrane with the carbon powder layer into a solution containing a platinum precursor and a weak reducing agent, standing for 48-72 hours at room temperature, taking the proton exchange membrane out, repeatedly rinsing the proton exchange membrane for multiple times by deionized water, and then carrying out drying treatment to obtain the proton exchange membrane with a platinum nanowire catalyst deposited on the carbon powder layer; and (3) spraying a layer of electrolyte solution on the surface of the platinum nanowire catalyst and then carrying out drying treatment to obtain the catalytic layer structure of the proton exchange membrane fuel cell.

The invention relates to a solid oxide fuel cell and a functional gradient composite cathode and a preparation method thereof. The functional gradient composite cathode for the solid oxide fuel cell comprises a chromium poisoning resistant layer, an activation layer and a current collection layer, wherein the chromium poisoning resistant layer is made of LNF (LaNi0.6Fe0.4O3) and doped CeO2, the activation layer is positioned above the chromium poisoning resistant layer and made of LSM (La0.8Sr0.2MnO3) and doped CeO2, and the current collection layer is positioned above the activation layer and made of LSM. The preparation method of the functional gradient composite cathode for the solid oxide fuel cell includes the steps: a, attaching paste of the chromium poisoning resistant layer onto an electrolyte layer and drying to obtain the chromium poisoning resistant layer; b, attaching paste of the activation layer onto the chromium poisoning resistant layer and drying to obtain the activation layer; c, attaching paste of the current collection layer to the activation layer and drying to obtain the current collection layer, so that a blank is obtained; and d, sintering the blank to obtain the functional gradient composite cathode. Chromium deposition of high-volatility CrO3 and CrO2 (OH)2 on cathode / electrolyte interfaces is reduced.

The invention relates to a method for preparing a NiO / apatite type lanthanum silicate submicro-nano porous anode functional layer, which adopts functional layer nanopowder, ethyl cellulose and terpineol to be added to a container filled with absolute ethanol In a rotary evaporator, ultrasonically disperse the mixed suspension; use a rotary evaporator to remove absolute ethanol in the suspension, and when the suspension becomes a viscous paste, take out the paste and grind it to complete the function Layer slurry preparation. Brush the functional layer slurry on the anode substrate, brush three layers, perform corresponding heat treatment and sintering after drying, control the heating and cooling rate and holding time during the heating process, and make the anode functional layer. The benefit of the present invention is that the prepared NiO / apatite type lanthanum silicate submicro-nano porous anode functional layer has a maximum pore size of less than 1 μm and a smooth surface without cracks, and is prepared several microns thick by magnetron sputtering on it. The dense electrolyte film provides the substrate; the functional layer contains a large number of nanometer pores to greatly increase the three-phase interface.

The invention relates to an alkaline anion exchange membrane fuel cell. Specifically, it is a preparation method of a membrane electrode with a transition layer: a basic anion exchange resin is coated between the basic anion exchange membrane and the catalytic layer as a transition layer, and then the catalytic layer composed of the catalyst and the basic anion exchange resin is coated It is coated on the transition layer to form a film-covered electrode with transition layer consisting of a basic anion exchange membrane, a transition layer and a catalytic layer. Then the electrode is placed between two gas diffusion layers to form a membrane electrode assembly, and a membrane electrode with a transition layer is prepared. The purpose of the film electrode with transition layer prepared by the present invention is to: improve the binding force of the catalytic layer and the basic anion exchange membrane phase interface, expand the three-phase reaction interface, promote the conduction of the anodic and anode catalytic layer and the basic anion exchange membrane OH, improve Alkaline anion exchange membrane fuel cell performance and cell operation stability.

A preparation method for a solid oxide fuel cell cathode relates to a preparation method for a fuel cell cathode, which resolves problem in prior art that catalytic activity of a solid oxide fuel cell cathode is low under middle and low temperature. The preparation method includes: preparing sol from La1-xSrx(NO3)3M(NO3)2 and citric acid solution, filling the sol into a hole of an anode aluminum oxide template, calcining under high temperature, dipping into NaOH solution, and obtaining the solid oxide fuel cell cathode. Catalytic activity of the solid oxide fuel cell cathode of present invention is high under middle and low temperature.

The invention discloses a method for preparing fuel cell electrodes and membrane electrodes with a fully ordered structure of a catalytic layer, and relates to the field of fuel cells. In the fuel cell electrodes and membrane electrodes prepared by the method of the invention, the catalytic layer components include catalyst active groups Parts, catalyst supports and ion conductors all have an ordered array structure. This fully ordered catalytic layer structure has a high three-phase reaction interface, which can provide efficient electron, ion and material transport channels, thereby effectively reducing the material transport resistance, charge transport resistance and electrochemical polarization resistance inside the electrode. , effectively improving the electrochemical reaction efficiency and energy conversion efficiency in the electrode. Through single cell performance testing and electrochemical characterization, the electrode and membrane electrode prepared by the preparation method of the present invention are significantly improved in terms of monomer performance and catalytic layer activity compared with electrodes and membrane electrodes prepared by the traditional method.