Magnesium vanadium composite hydrogen occluding alloy

Abstract

The invention relates to a magnesium vanadium composite hydrogen storage alloy and a method for manufacturing the same, belonging to the metal material field. The invention is characterized in that vanadium base sosoloid hydrogen storage alloy powder containing transition elements and magnesium powder are mixed according to a certain volume proportion to manufacture the magnesium vanadium composite hydrogen storage alloy through a spark plasma sintering method. A chemical formula of the hydrogen storage alloy is MgX(V1-RMR)1-X, wherein, V is metal vanadium; M is a mixture of transition elements Ni, Zr, Mn and Ti in equal weight; R is more than or equal to 5 percent and less than or equal to 10 percent in percentage by weight; Mg is metal magnesium powder; and X is more than or equal to 75percent and less than or equal to 85 percent in percentage by volume. Compared with the prior art, the hydrogen storage alloy has the prominent advantages that: under the condition of room temperatureand at a temperature of 300 DEG C, the hydrogen storage alloy can rapidly absorb and discharge hydrogen and has simple manufacturing process and short processing time. The alloy can be used for manufacturing a hydrogen fuel tank, a hydrogen accumulator, etc. and is particularly suitable for a hydrogen fuel cell, a hydrogen fueled engine and other systems.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a magnesium-vanadium composite hydrogen storage material with industrial magnesium powder as the main component and vanadium-based solid solution as the secondary component, and is manufactured by a discharge plasma sintering method. Background technique [0002] Hydrogen energy is a renewable and clean energy. At present, with the increasing shortage of petrochemical energy and the increasing environmental pollution, hydrogen energy has received more and more attention. Fuel cells using hydrogen as fuel have been gradually applied in fields such as hydrogen-burning vehicles, mopeds, and motorcycles, but their hydrogen source supply system, that is, the storage and delivery of hydrogen, is currently one of the bottlenecks restricting the further application of hydrogen energy. How to Solving this problem has become a top priority. Metal hydrogen storage as a hydrogen storage carrie...

AI Technical Summary

Problems solved by technology

The other is alloys with high hydrogen storage capacity, such as the maximum weight hydrogen storage density of pure magnesium is 7.6%, magnesium alloy (Mg 2 Ni) has a maximum weight hydrogen storage density of 3.6%, but its hydrogen storage conditions are harsh. Pure magnesium can only absorb hydrogen at 320-400°C and a hydrogen pressure of 6.0MPa. The hydrogen absorption speed is slow, and the hydrogen desorption process after hydrogen absorption Very difficult, difficult to carry out; magnesium alloy (Mg 2 Ni) can only react with hydrogen at 200°C and 1.4MPa hydrogen pressure