High-capacity RE-Mg-Ni-Co based hydrogen storage alloy and preparation method thereof
A re-mg-ni-co, hydrogen storage alloy technology, applied in the field of high-capacity RE-Mg-Ni-Co-based hydrogen storage alloys and their preparation, can solve the problems of reducing alloy hydrides, no reversible hydrogen absorption and desorption, etc. , achieve high hydrogen absorption and desorption capacity, and improve the kinetic performance of hydrogen absorption and desorption
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[0028] Example 1:
[0029] According to the chemical formula Ce 0.6 La 0.4 Mg 11 Ni is selected from bulk metal magnesium, metal nickel, rare earth metal cerium and lanthanum. The purity of these metals is ≥99.8%, and they are weighed according to the chemical dose ratio. The crucible capacity of the smelting furnace is about 2 kg, and the ingredients are calculated as 2 kg per furnace. Weigh 1240.0g metallic magnesium, 252.0g metallic nickel, 379.3g metallic cerium, and 250.5g metallic lanthanum, and place them in a magnesium oxide crucible of an intermediate frequency induction furnace, then cover the furnace lid and vacuum for about 40 minutes to a vacuum of 5×10 -3 Pa is above Pa, then fill with helium protective gas until the pressure reaches 0.04MPa negative pressure, adjust the power to 5kW, control the temperature at about 700°C to melt the metal magnesium, then adjust the power to 25kW, and the temperature control at 1600°C to make the metal nickel, Cerium and lanthanum...
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[0032] Example 2:
[0033] The alloy composition is: Ce 0.6 Y 0.4 Mg 11 Ni, weighed 1295.5g metallic magnesium, 363.3g metallic nickel, 396.3g metallic cerium, and 167.5g metallic yttrium, and prepared alloy powder according to the method of Example 1. The difference is nano-NbF 5 The amount of catalyst added is 4g (8wt%). The structure of the alloy powder was tested by XRD, the results are shown in figure 1 ; The gaseous hydrogen absorption and desorption capacity and kinetics of the alloy powder were tested, and the results are shown in Table 1.
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[0034] Example 3:
[0035] The alloy composition is: Ce 0.6 Nd 0.4 Mg 11 Ni, weigh 1234.4g of metallic magnesium, 250.9g of metallic nickel, 258.9g of metallic neodymium, and 377.6g of metallic cerium, and prepare alloy powder according to the method of Example 1. The difference is nano-NbF 5 The amount of catalyst added is 2g (4wt%). The structure of alloy powder was tested by XRD, and the results are shown in figure 1 ; The gaseous hydrogen absorption and desorption capacity and kinetics of the alloy powder were tested, and the results are shown in Table 1.
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