論文

査読有り
2017年2月15日

In-situ investigation of the hydrogen release mechanism in bulk Mg2NiH4

Journal of Power Sources
  • Xuan Quy Tran
  • ,
  • Stuart D. McDonald
  • ,
  • Qinfen Gu
  • ,
  • Tomokazu Yamamoto
  • ,
  • Koji Shigematsu
  • ,
  • Kohei Aso
  • ,
  • Eishi Tanaka
  • ,
  • Syo Matsumura
  • ,
  • Kazuhiro Nogita

341
開始ページ
130
終了ページ
138
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.jpowsour.2016.11.105
出版者・発行元
Elsevier B.V.

Hydrogen storage is an important aspect to enable the so-called hydrogen economy. Mg-Ni alloys are among the most promising candidates for solid-state hydrogen storage systems yet many questions remain unanswered regarding the hydriding/dehydriding mechanism of the alloys. Mg2NiH4 particularly has received much attention both for its potential as a hydrogen storage medium and also exhibits interesting properties relating to its different polymorphs. Here, the dehydriding mechanism in bulk Mg2NiH4 is investigated using in-situ ultra-high voltage transmission electron microscopy (TEM) combined with Synchrotron powder X-ray diffraction (XRPD) and differential scanning calorimetry (DSC). We find that the hydrogen release is based on a mechanism of nucleation and growth of Mg2NiHx (x∼0–0.3) solid solution grains and is greatly enhanced in the presence of crystal defects occurring as a result of the polymorphic phase transformation. Also importantly, with atomic resolution TEM imaging a high density of stacking faults is identified in the dehydrided Mg2NiHx (x∼0–0.3) lattices.

リンク情報
DOI
https://doi.org/10.1016/j.jpowsour.2016.11.105
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85002639588&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85002639588&origin=inward
ID情報
  • DOI : 10.1016/j.jpowsour.2016.11.105
  • ISSN : 0378-7753
  • eISSN : 2516-0230
  • SCOPUS ID : 85002639588

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