Process for manufacturing magnesium air fuel cell anode material

Abstract

The invention discloses a manufacture method for anode material of a magnesium air fuel battery, which includes the steps as follows: clean magnesium is prepared; clean magnesium is treated in an alloying way; a grain refiner is added and the alloyed clean magnesium is manufactured into magnesium alloy sticks with thin grains through controlling the cooling speed and the structure of a crystallizer; and the magnesium alloy stick is squeezed into a plate. The grains of the material of the magnesium air fuel battery manufactured by the method provided by the invention are thin, uniform and the chemical components are stable; as the anode material with small grains can enlarge the overpotential of a hydrogen evolution reaction, the self-corrosion rate of the anode material is greatly reducedand the service of the product is improved.

Description

technical field [0001] The invention relates to a manufacturing method of a fuel cell material, in particular to a manufacturing method of an anode material of a magnesium-air fuel cell. Background technique [0002] With more and more attention paid to the problem of environmental pollution, there is an urgent need for new energy sources with no pollution or zero emissions. Fuel cell technology provides a power generation method that can improve energy utilization and reduce exhaust emissions. Its own superiority determines the application prospects in the fields of national defense construction and national security, as well as in civilian applications such as mobile communications and micro power sources. [0003] Metal fuel cell, also known as metal-air battery, is a new concept fuel cell formed by using metal fuel instead of hydrogen. Metals such as zinc and aluminum are provided to the reaction sites in the battery like fuel hydrogen, and together with oxygen they form...

AI Technical Summary

Problems solved by technology

[0005] However, the materials used in the prior art magnesium-air fuel cells are directly made by casting or rolling liquid magnesium alloys into plates, and the magnesium alloy fuel cell materials manufactured by this method have high impurity content and coarse grains, resulting in The hydrogen evolution reaction is serious, which increases the self-corrosion rate of the anode material. Due to the high self-corrosion rate, low utilization rate of the anode, especially the severe polarization of the anode, it is difficult to meet the engineering technical requirements of the anode material for saline-activated batteries.

In addition, the reaction corrosion products adhere to the surface of the magnesium alloy anode, which prevents the electrochemical reaction, reduces the performance of the battery, and reduces the electrical efficiency of the anode and the service life of the battery.