A kind of micro-methanol fuel cell based on magnesium alloy and its preparation method

Abstract

The invention belongs to the field of a proton exchange membrane fuel cell, in particular relates to a passive miniature methanol fuel cell and a preparation method thereof. The miniature methanol fuel cell comprises an anode liquid storage cavity, an anode flow field plate, an insulation gasket, a membrane electrode and a cathode flow field plate, wherein the anode liquid storage cavity, the anode flow field plate and the cathode flow field plate are made of an magnesium alloy material, and an aluminum oxide micro-arc oxidation porous ceramic membrane is grown on the surface of the magnesium alloy material by using a micro-arc oxidation technology. The battery is light in weight, and the gravimetric specific energy of the battery is high; and since the micro-arc oxidation porous ceramic membrane is prepared on the surface of the magnesium alloy, the corrosion resistance of the magnesium alloy is improved.

Description

[0001] Technical field: [0002] The invention belongs to the field of proton exchange membrane fuel cells, and in particular relates to a passive micro-methanol fuel cell and a preparation method thereof. [0003] Background technique: [0004] Micro direct methanol fuel cell (uDMFC) is a kind of proton exchange membrane fuel cell, using perfluorosulfonic acid solid polymer as proton exchange membrane, directly using methanol or methanol aqueous solution as anode fuel, oxygen or Air is used as an oxidant. Due to the wide source of methanol, convenient storage and transportation, and high energy density, uDMFC has the characteristics of high specific energy, simple structure, and no need for external reforming equipment. with broadly application foreground. [0005] Judging from the current research status at home and abroad, the substrate materials used in micro-methanol fuel cells mainly include silicon materials, polymer materials and metal materials. Although silicon mater...

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Problems solved by technology

[0005] Judging from the current research status at home and abroad, the substrate materials used in micro-methanol fuel cells mainly include silicon materials, polymer materials and metal materials. Although silicon materials have good machinability, they are too brittle and the packaging Difficult, and the silicon material has poor conductivity, and the internal resistance of the battery is large; the polymer material has a low density, but its thermal conductivity is poor, and it is easy to deform at high temperature, and its conductivity problem needs to be solved when it is used as a current collector; the metal material has high mechanical strength. , good conductivity, but the density of metal materials is high, and its corrosion resistance is poor, so surface treatment is needed to improve its corrosion resistance

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