Effects of Ti interlayers on microstructures and hydrogen storage capacity in Mg/Pd multilayer thin films

Hwaebong Jung, Junhan Yuh, Sungmee Cho, Wooyoung Lee

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In this work, we examine the microstructural and hydrogen storage properties of 60 multilayer Mg/Pd and Ti/Mg/Ti/Pd films using an ultra-high-vacuum (UHV) DC magnetron sputtering system. The hydrogen absorption capacity of the Ti/Mg/Ti/Pd film was found to be 1.7, 3.5, and 4.7 wt% at 50, 100, and 150 C, respectively, while that of the Mg/Pd film was measured at significantly lower values, 0.18, 0.65, and 1.35 wt%. The hydrogen absorption capacity for the Mg/Pd and Ti/Mg/Ti/Pd films is greatly dependent upon the formation of Mg-Pd intermetallic phases, formed during the hydrogenation process. Our results demonstrate that Ti interlayers in the Ti/Mg/Ti/Pd film play a crucial role in preventing the formation of Mg-Pd intermetallic phases, which originate from the inter-diffusion of Mg and Pd atoms during hydrogenation, and thus result in an improved hydrogen storage capacity.

Original languageEnglish
Pages (from-to)63-66
Number of pages4
JournalJournal of Alloys and Compounds
Volume601
DOIs
Publication statusPublished - 2014 Jul 15

Fingerprint

Multilayer films
Hydrogen storage
Thin films
Microstructure
Hydrogenation
Intermetallics
Hydrogen
Ultrahigh vacuum
Magnetron sputtering
Multilayers
Atoms

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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abstract = "In this work, we examine the microstructural and hydrogen storage properties of 60 multilayer Mg/Pd and Ti/Mg/Ti/Pd films using an ultra-high-vacuum (UHV) DC magnetron sputtering system. The hydrogen absorption capacity of the Ti/Mg/Ti/Pd film was found to be 1.7, 3.5, and 4.7 wt{\%} at 50, 100, and 150 C, respectively, while that of the Mg/Pd film was measured at significantly lower values, 0.18, 0.65, and 1.35 wt{\%}. The hydrogen absorption capacity for the Mg/Pd and Ti/Mg/Ti/Pd films is greatly dependent upon the formation of Mg-Pd intermetallic phases, formed during the hydrogenation process. Our results demonstrate that Ti interlayers in the Ti/Mg/Ti/Pd film play a crucial role in preventing the formation of Mg-Pd intermetallic phases, which originate from the inter-diffusion of Mg and Pd atoms during hydrogenation, and thus result in an improved hydrogen storage capacity.",
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Effects of Ti interlayers on microstructures and hydrogen storage capacity in Mg/Pd multilayer thin films. / Jung, Hwaebong; Yuh, Junhan; Cho, Sungmee; Lee, Wooyoung.

In: Journal of Alloys and Compounds, Vol. 601, 15.07.2014, p. 63-66.

Research output: Contribution to journalArticle

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AU - Yuh, Junhan

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AU - Lee, Wooyoung

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AB - In this work, we examine the microstructural and hydrogen storage properties of 60 multilayer Mg/Pd and Ti/Mg/Ti/Pd films using an ultra-high-vacuum (UHV) DC magnetron sputtering system. The hydrogen absorption capacity of the Ti/Mg/Ti/Pd film was found to be 1.7, 3.5, and 4.7 wt% at 50, 100, and 150 C, respectively, while that of the Mg/Pd film was measured at significantly lower values, 0.18, 0.65, and 1.35 wt%. The hydrogen absorption capacity for the Mg/Pd and Ti/Mg/Ti/Pd films is greatly dependent upon the formation of Mg-Pd intermetallic phases, formed during the hydrogenation process. Our results demonstrate that Ti interlayers in the Ti/Mg/Ti/Pd film play a crucial role in preventing the formation of Mg-Pd intermetallic phases, which originate from the inter-diffusion of Mg and Pd atoms during hydrogenation, and thus result in an improved hydrogen storage capacity.

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