Rear earth-ferrotitanium hydrogen storage alloy for wind power storage and preparation method thereof

The invention belongs to the technical field of hydrogen storage alloys, and relates to a rear earth-ferrotitanium hydrogen storage alloy for wind power storage and a preparation method thereof. The rear earth-ferrotitanium hydrogen storage alloy consists of Ti, Fe, Mn, multi-component rear earth and few LaNi5 alloy, and has a chemical formula as follows: Ti1.1-xFe0.8Mn0.2Mx+yLaNi5, wherein x is an atomic ratio greater than 0 and less than or equal to 0.09, y is mass percent greater than or equal to 2% and less than or equal to 8%, and M is multi-component rear earth which further contains at least one of Ce, Y, Nd, Pr and Gd in addition to La with the atomic ratio of 0.5-0.7. The alloy is prepared by the following steps: proportioning, carrying out vacuum smelting, carrying out rapid quenching, carrying out mechanical crushing and carrying out ball-milling. The rear earth-ferrotitanium hydrogen storage alloy mainly adopts Ti and Fe elements which are rich in the natural world and cheap, so that large-scale popularization and application are facilitated. Compared with a smelting and annealing process, the alloy with high-density nanocrystalline grains is prepared through the rapid quenching process; and by virtue of mechanical ball-milling, the alloy forms high-density crystal defects. The rapid quenching process and the ball-milling process are simple and easy to grasp, so that the preparation method is suitable for large-scale production.