A study on the first hydrogenation behavior of TiFe0.9Cr0.1 hydrogen storage alloy with the laves phase

Da Hye Lee, Hyeon Tae Im, Hong Gi Kwon, Sung Min Park, Ryun Ho Kwak, Chang Soo Park, Ki Beom Park, Seok Su Sohn, Hyung Ki Park

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This study investigated the first hydrogenation behavior of TiFe-based hydrogen storage alloy with the laves phase. A TiFe0.9Cr0.1 alloy was prepared through vacuum arc melting, and it had a dual-phase microstructure with B2 and laves phases. The first hydrogenation kinetics was measured by applying a hydrogen pressure of 40 bar at 30 °C, where the alloy absorbed hydrogen without thermal activation. The first hydrogenation kinetics was divided into three sections to understand the first hydrogenation behavior, and each section was analyzed using a solid–gas reaction model. The model's goodness of fit was evaluated by fitting each section. In the early hydrogen absorption stage, a surface-controlled mechanism (Chemisorption model) was analyzed to be the most dominant. In the second stage, where hydrogen was quickly absorbed, an interface-controlled mechanism (CV3D model) was most suitable. In the last hydrogen absorption stage, where hydrogen absorption was saturated, a diffusion-controlled mechanism (GB3D model) was most suitable.

Original languageEnglish
Pages (from-to)864-870
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume56
DOIs
Publication statusPublished - 2024 Feb 22

Bibliographical note

Publisher Copyright:
© 2023 The Authors

Keywords

  • First hydrogenation kinetics
  • Hydrogen storage alloy
  • Laves phase
  • Solid–gas reaction model
  • TiFe alloy

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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