Tapered cylindrical membrane electrode for oxyhydrogen proton exchange membrane fuel cell

Abstract

The invention discloses a tapered cylindrical membrane electrode for oxyhydrogen proton exchange membrane fuel cell, which is characterized by comprising an anode in contact with hydrogen, a composite membrane and a cathode in contact with air from inside to outside; the composite membrane is composed of a proton exchange membrane (which usually is a Nafion membrane), an output joint is arranged at a anode plate, a seal ring used for isolating the anode output joint from the composite membrane and the cathode is arranged at the anode output joint and a cathode output joint is arranged at the bottom of the cathode; and the anode is in a cone shape, the composite membrane is in a cone shape matched with the cone shape of the anode, the cathode is a hollow pipe, the outside surface of the cathode hollow pipe is cylindrical and the inner hole of the cathode hollow pipe takes a shape of a cone hole with the same conical degree as the cathode. In the invention, the structure is reasonable and crucially a conical structure is adopted to ensure that a problem of the close fit between the cylindrical oxyhydrogen proton exchange membrane fuel cell electrode and the composite membrane can be solved, therefore, the battery performance can be greatly enhanced, and the manufacture and the assembly can be convenient.

Description

Technical field: [0001] The invention relates to an electrode structure for a cylindrical hydrogen-oxygen proton exchange membrane fuel cell. Background technique: [0002] The 21st century is a century of energy shortage. The development of new energy and the rational and efficient use of existing energy have become the theme of development in this century. At present, fossil energy such as oil, natural gas, and coal on which human beings depend is decreasing day by day, and will be replaced by renewable resources such as hydrogen energy, solar energy, and wind energy. At the same time, due to the inefficient combustion and use of existing resources (such as oil, natural gas and coal), both energy is wasted and the environment is seriously polluted, which has become an important problem that must be solved in this century. [0003] Fuel cells are an electrochemical power generation device that can directly convert chemical energy into electrical energy. It does not underg...

AI Technical Summary

Problems solved by technology

[0006] After years of development, proton exchange membrane fuel cells have matured in all aspects of technology and are now close to commercialization. The main aspect of research is still around flat-plate fuel cells, and there are many types of flat-plate fuel cells on the market. The flat-plate fuel cell composed of bipolar plate, membrane electrode and catalyst not only has high battery cost, but also has many disadvantages: the battery is bulky, heavy, difficult to seal, and cumbersome to install. Water and heat management brings many difficulties. The loss of water balance in the battery causes a sharp drop in the working voltage of the battery, which affects the efficiency and life of the battery.

However, the general cylindrical shape adopts the winding method, which cannot solve the problem of close contact between the membrane electrode, cathode and anode.

In particular, after the reaction produces water, it will expand, making it easier for a gap to appear between the membrane and the electrode, which will greatly reduce the performance of the battery.

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