TiFe is a very interesting material for hydrogen storage in the solid state, due to its hydrogen capacity of 1.9 wt % and to the fact it can be absorb/desorb hydrogen at room temperature. However, the TiFe produced by casting does not absorb hydrogen, unless a procedure called activation is applied, which is based on a repetition of several thermal cycles. This study evaluates the effects of a mechanical activation route for the TiFe intermetallic compound, namely, cold rolling (CR) under inert atmosphere. Stoichiometric TiFe was prepared from elementary powders by arc melting. Ingot was grinded and then cold rolled for 20 and 40 passes under argon inside a glove box, with moisture and oxygen contents below 0.1 ppm. Cold rolled samples consisted of two parts: powder particles and thin cracked flakes. The results showed that mechanically activated samples by CR exhibited rapid absorption of hydrogen at room temperature, without using a thermal activation process. In general, the average storage capacity of hydrogen was 1.4 wt% H₂ for the first absorption, regardless of the number of passes for both flake and powder samples.

TiFe是一种非常有趣的固态氢存储材料，这是因为TiFe的氢容量为1.9 wt％，并且它可以在室温下吸收/解吸氢。但是，通过铸造产生的TiFe不会吸收氢，除非应用称为活化的过程，该过程是基于多次热循环的重复进行的。这项研究评估了TiFe金属间化合物的机械活化途径，即惰性气氛下的冷轧（CR）的影响。化学计量的TiFe是通过电弧熔化从基本粉末中制备的。将锭磨碎，然后在手套箱内的氩气下冷轧20和40道次，水分和氧气含量低于0.1 ppm。冷轧样品由两部分组成：粉末颗粒和薄裂纹片。结果表明，在不使用热活化过程的情况下，通过CR机械活化的样品在室温下表现出快速的氢吸收。通常，氢气的平均储存容量为1.4 wt％H第一次吸收为₂，与片状和粉末样品的通过次数无关。