Numerical analysis of absorbing and desorbing mechanism for the metal hydride by homogenization method

Yusuke Asakuma, Shinsuke Miyauchi, Tsuyoshi Yamamoto, Hideyuki Aoki, Takatoshi Miura

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Storage capacity and fast reaction rate are the most important properties for hydrogen storage alloys. To clarify the mechanism of the rate-controlling step, we analyzed the hydrogen diffusion coefficients of the hydride by the homogenization method, which considers the microstructure of the alloy at the microscale (0.1-10 μm) precisely. By applying nucleation and growth model, we have discussed the absorbing and desorbing mechanism of the metal hydride. Our results and analysis show that it is important for the hydriding or dehydriding reaction to consider the number of nuclei and the transfer of hydrogen atom through the α-β interface data. Estimation of the microstructure of the metal hydride by using the homogenization method is useful for the absorbing and desorbing mechanism.

Original languageEnglish
Pages (from-to)529-536
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume28
Issue number5
DOIs
Publication statusPublished - 2003 May 1

Keywords

  • Diffusion coefficient
  • Homogenization method
  • Microstructure
  • Nucleation and growth model

ASJC Scopus subject areas

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

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