32results about How to "Improve gas diffusivity" patented technology

A fuel cell capable of improving heat exchange efficiency with respect to tubular fuel cells is provided. A fuel cell includes a hollow electrolyte membrane, hollow electrodes arranged on an inside and an outside of the electrolyte membrane, respectively, and an internal charge collector arranged inside of the electrolyte membrane and the electrodes, wherein the internal charge collector is hollow and made of a nonporous member.

The invention discloses a method for preparing carbon paper for a gas diffusion layer of a fuel cell with high carbon content. The preparation method comprises the following steps: immersing carbon fiber paper in a first conductive ink, ultrasonic treatment first, then negative pressure impregnation, and then drying, so that the first The solute in the conductive ink is combined with the carbon fiber paper to obtain the carbon paper precursor A; the carbon paper precursor A is carbonized to obtain the carbon paper precursor B; the carbon paper precursor B is impregnated-cured-carbonized with the second conductive ink The carbon paper precursor C is obtained, and the carbon paper precursor C and the third conductive ink are repeatedly impregnated-cured-carbonization treatment to obtain the carbon paper precursor D; the carbon paper precursor D is graphitized to obtain carbon paper. The carbon paper prepared by the invention has the mechanical strength of the gas diffusion layer, gas diffusion performance and high porosity, and has the characteristics of stable chemical performance, low resistivity and high electrical conductivity.

The invention discloses a high temperature adaptable frequency converter, belonging to the field of frequency converters. A high temperature adaptable frequency converter comprises an adaptable frequency converter body. An air inlet baffle is fixedly connected to the left end of the adaptable frequency converter body, and the air intake temperature is sensed. The right inner wall of the groove is provided with a plurality of air inlet holes which are connected to the inside of the adaptable inverter body. Through the cooperation of the flexible diameter-adjusting hollow sleeve, the temperature-sensing outer sheath, the temperature-sensing heat-collecting strip and the heat-shrinkable mesh, the The air inlet hole of the adaptable inverter body is adjustable, so that it can maintain the dustproof and air intake function when the adaptable inverter body is normally dissipating heat, and can also increase the diameter by expanding the diameter when the adaptable inverter body is overheated. The air flow in the large adaptable inverter body can effectively improve the heat dissipation effect of the adaptable inverter body, and at the same time improve the adaptability of the adaptable inverter body to high temperature, it can also reduce the energy consumption of the inverter and improve its environmental protection and energy saving. nature.