Hydrogenation improvement of TiFe by adding ZrMn2

Substitutional effects in TiFe for hydrogen storage: a comprehensive review

“…[192,193] In contrast, capacity is reduced, because only the monohydride can be formed by Zr substitution. [194] The introduction of both V and Mn results in lower plateaus pressures, decreased hysteresis, flatter plateaus, good activation and capacity, showing a synergic effect of both Mn and V. [123] The effect of the double substitution in Fe-rich alloys (detailed composition reported in Table 4) was explored by Mitrokhin et al evidencing the formation of a secondary C14 Laves phase. [195,196] Combined Mn and V substitution reduces the pressure gap (V effect) between the two plateaus, that merge into one at lower pressure compared to pure TiFe, while enthalpy of reaction increases (Mn effect).…”

Scaling up Metal Hydrides for Real-Scale Applications: Achievements, Challenges and Outlook

“…After 20 h, both samples containing only Mn as an additive absorbed more hydrogen than samples only containing Zr as an additive, though the kinetics were still sluggish, as also seen on lab-scale samples [56,57]. When adding both elements, a synergistic effect occurred, reaching a capacity of 1.8-2.0 wt% of H 2 and improved kinetics with a maximum capacity reached in 5 h. The corresponding compounds with both elements at the lab-scale achieved a capacity of 0.9 wt% H 2 after 12 h of absorption [11]. In this case, the results showed a clear improvement of the large-scale samples.…”

“…Hydrogen is a promising energy vector since it can store and deliver energy in a useable form, with its energy density being three times higher than that of liquid hydrocarbons [4,5]. Today, hydrogen is stored as gas [6], by cryo-compression [7][8][9], as liquid [10], in solid-state materials [11][12][13], and chemically [14], e.g., ammonia [15].…”

Effect of Cold Rolling on Metal Hydrides

“…Lv and Huot studied the multiphase system TiFe + X wt.% ZrMn 2 (X = 2, 4, 8, 12). 21) They found that, for this multiphase system, cold rolling has a minimal impact on the hydrogenation kinetics except for the compound TiFe + 4 wt.% ZrMn 2 for which incubation time was eliminated by cold rolling. Vega et al performed cold rolling of TiFe under an inert atmosphere.…”