Titanium-manganese-based hydrogen storage alloy and preparation method and application thereof

Abstract

The invention relates to the technical field of titanium-manganese hydrogen storage alloys, in particular to a titanium-manganese-based hydrogen storage alloy and a preparation method and application thereof, the titanium-manganese-based hydrogen storage alloy is composed of Ti Zr Mn < 1.5-m-n > X < m > Y < n >, 1, 0lt; b is less than or equal to 0.4, and a + b = 1, 0lt; m is less than or equal to 0.05, 0lt; n is less than or equal to 0.5, X comprises at least one of Co, Cr and Ni, and Y comprises at least one of Fe and V. By changing the phase structure and the structure uniformity of the alloy, the alloy material has higher activation performance on the premise of ensuring the hydrogen storage capacity, and the hysteresis effect of hydrogen absorption and release is greatly reduced; and the hydrogen absorption and desorption cycle index and the stability are greatly improved.

Claims

1. A titanium-manganese-based hydrogen storage alloy, characterized in that: The composition of the titanium-manganese-based hydrogen storage alloy is: Ti a Zr b Mn 1.5-m- n X m Y n , where 0.6 ≤ a < 1, 0 < b ≤ 0.4, and a + b = 1, 0 < m ≤ 0.05, 0 < n ≤ 0.5, X includes at least one of Co, Cr, and Ni, and Y includes at least one of Fe and V.

2. A titanium-manganese-based hydrogen storage alloy according to claim 1, characterized in that: The composition of the titanium-manganese-based hydrogen storage alloy is (Ti 0.9 Zr 0.1 )Mn 0.95 (CoCrNi) 0.05 (Fe 50 V 50 ) 0.5 .

3. A method for preparing a titanium-manganese-based hydrogen storage alloy as claimed in claim 1 or 2, characterized in that: The following steps are involved: A. Mixing the metal raw materials according to the content of the titanium-manganese-based hydrogen storage alloy, and obtaining alloy powder with a particle size of 25-180 μm by vacuum atomization; B. The alloy powder in step A is 3D printed, heat treated and crushed by laser melting deposition equipment to obtain a titanium-manganese-based hydrogen storage alloy.

4. The preparation method according to claim 3, characterized in that: In step A, the purity of each metal raw material in the composition of the titanium-manganese-based hydrogen storage alloy is ≥99.8%.

5. The preparation method according to claim 3, characterized in that: In step B, the parameters of the laser melting deposition 3D printing are laser power 800-1200W, scanning speed 600-1000mm / min, scanning spacing 1-3mm, and layer height 0.2-0.5mm.

6. The preparation method according to claim 3, characterized in that: In step B, the heat treatment is performed by heating to 700-800°C at 10-30°C / min, keeping the temperature for 30-60min, quenching into water at room temperature, heating to 400-500°C, keeping the temperature for 300-500min, and cooling to room temperature to obtain a titanium-manganese-based hydrogen storage alloy material.

7. The preparation method according to claim 3, characterized in that: In step B, the specific process of crushing is first crushing and passing through a 150-mesh sieve, and then ball milling under inert gas protection. The ball milling conditions are a ball-to-material ratio of 40:1, a rotation speed of 350 rpm, and a 1-hour stop for every 2 hours of ball milling, and finally a particle size of 10 to 100 μm is obtained.

8. Use of the titanium-manganese-based hydrogen storage alloy as claimed in claim 1 or 2 or the titanium-manganese-based hydrogen storage alloy prepared by the preparation method of any one of claims 3 to 7 in a hydrogen storage tank.

Images