Study on AB_2-type Ti-Mn Based Hydrogen Storage Alloys for Metal Hydride Hydrogen Compressor

AB2-type Ti-Mn based Laves phase hydrogen storage alloys were prepared for metal hydride hydrogen compressor.The effect of V-Fe,Mn/Cr value and Zr content on the hydrogen storage properties and thermodynamic performance of the alloys were investigated.The alloy Ti0.9Zr0.1Mn1.4Cr0.35V0.2Fe0.05 was optimized from the studied alloys due to its comprehensive hydrogen storage properties.This alloy showed relatively low equilibriums during hydrogen absorption and desorption,small hysteresis and flat hydrogen plateau.Furthermore,the alloy showed large enthalpy change during dehydring process and large compression ratio.Product hydrogen gas with high pressure could be achieved by this alloy with the hot oil as the heat exchange medium.