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Study on decomposition process of NaAlH4 by in-situ TEM

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Title: Study on decomposition process of NaAlH4 by in-situ TEM
Authors: Isobe, Shigehito Browse this author →KAKEN DB
Yao, Hao Browse this author
Wang, Yongming Browse this author
Kawasaki, Hiroshi Browse this author
Hashimoto, Naoyuki Browse this author
Ohnuki, Somei Browse this author →KAKEN DB
Keywords: NaAlH4
Hydrogen storage
In-situ TEM
Glove bag method
Issue Date: Jul-2010
Publisher: Elsevier
Journal Title: International Journal of Hydrogen Energy
Volume: 35
Issue: 14
Start Page: 7563
End Page: 7567
Publisher DOI: 10.1016/j.ijhydene.2010.05.001
Abstract: In-situ transmission electron microscopy (TEM) has been performed to observe decomposition process of sodium alanate (NaAlH4) in this work. NaAlH4 was ground in a glove box under inert gas, and then it was transferred into microscope without exposed to air by Plastic Bag Method. The results of in-situ electron beam diffraction showed that NaAlH4 decomposed to Na3AlH6 + Al, and NaH + Al during heated up to 150, 200℃, respectively. Moreover, we obtained the result of high resolution (HR) TEM images about the decomposition of NaAlH4 by high voltage electron microscopy (HVEM) of 1250 keV. It showed that the porous structures appeared with increase of temperature. This should be from structural defects and/or cavities due to volume change of the phases. It was also shown that Na3AlH6 and Al particles with the grain size of several ten nm were irregularly distributed near the pores.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 礒部 繁人

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