2024-03-29T13:30:27Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/437922022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Study on decomposition process of NaAlH4 by in-situ TEM1000010564370Isobe, ShigehitoYao, HaoWang, YongmingKawasaki, HiroshiHashimoto, Naoyuki1000010142697Ohnuki, Someiopen accessNaAlH4Hydrogen storageIn-situ TEMGlove bag method501In-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.Elsevier2010-07engjournal articleAMhttp://hdl.handle.net/2115/43792https://doi.org/10.1016/j.ijhydene.2010.05.0010360-3199International Journal of Hydrogen Energy351475637567https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/43792/1/IJHE35-14_7563-7567.pdfapplication/pdf985.74 KB2010-07