Hydrogenation improvement of TiFe by adding ZrMn2

Peng Lv and Jacques Huot

Energy, 2017, vol. 138, issue C, 375-382

Abstract: In this paper, we report the microstructure and hydrogen storage properties of TiFe + x wt.%ZrMn2 (x = 2, 4, 8, 12) alloys prepared by arc melting. Each alloy was made of two phases: a TiFe phase with very small amount of zirconium and manganese, and a second phase which has a higher proportion of zirconium and manganese. We found that the first hydrogenation kinetics increase with x. This is most likely due to the presence of zirconium-rich secondary phase that acts as a gateway for hydrogen to enter the main TiFe phase. Pressure-composition isotherms also show that increasing x decreases the absorption plateau pressure. Moreover, for x = 12, air exposure had a minimal impact on hydrogen absorption behaviour. Finally, we found that cold rolling has minimal effect on the activation kinetics of TiFe + x wt.%ZrMn2 (x = 4) alloy.

Keywords: TiFe alloy; Activation; Hydrogen storage properties; Air exposure; Cold rolling (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:138:y:2017:i:c:p:375-382

DOI: 10.1016/j.energy.2017.07.072

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