@article{0886cf874d6849c2a0c70dcbcfa07424,
title = "Fast and stable hydrogen storage in the porous composite of MgH2 with Nb2O5 catalyst and carbon nanotube",
abstract = "The MgH2-Nb2O5-carbon nanotube (CNT) composite was fabricated to accommodate the volume change of particles during the hydrogen storage cycles by holding the MgH2-Nb2O5 particles within the sponge-like matrix of the CNT. This allowed for preservation of the composite structure and led to more stable hydrogen sorption properties during 20 cycles, as compared to without CNT. To investigate this effect of CNT on the cyclic stability of MgH2-Nb2O5, CNT and expanded graphite (EG) were added to MgH2-Nb2O5 via ball milling. The MgH2-Nb2O5-CNT powder showed stable cyclic performance, similar to the MgH2-Nb2O5-CNT composite, whereas the MgH2-Nb2O5-EG powder exhibited cyclic degradation similar to MgH2-Nb2O5. From SEM-EDS, it was found that the C/Mg ratio of the surface of the MgH2-Nb2O5-CNT powder was higher than that of the MgH2-Nb2O5-EG powder. Thus, the fibrous CNT on the surface of the MgH2 particles could be responsible for the greater cyclic stability of the MgH2-Nb2O5-CNT composite.",
keywords = "Carbon nanotube, Cyclic stability, Gas-solid reactions, Hydrogen absorbing materials, Magnesium hydride",
author = "Kosuke Kajiwara and Hisashi Sugime and Suguru Noda and Nobuko Hanada",
note = "Funding Information: This work has been partially supported by TEPCO Memorial Foundation and The Satomi Scholarship Foundation . The authors thank Bozhi Chen at Waseda University for TEM observation. The authors thank Dr. Mochen Li at Waseda University for TEM observation and BET measurement. The authors thank Tomoki Hamasawa at Waseda University for SEM observation, preparation of TEM samples, and the measurement of hydrogen storage properties. Funding Information: This work has been partially supported by TEPCO Memorial Foundation and The Satomi Scholarship Foundation. The authors thank Bozhi Chen at Waseda University for TEM observation. The authors thank Dr. Mochen Li at Waseda University for TEM observation and BET measurement. The authors thank Tomoki Hamasawa at Waseda University for SEM observation, preparation of TEM samples, and the measurement of hydrogen storage properties. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",
year = "2022",
month = feb,
day = "10",
doi = "10.1016/j.jallcom.2021.162206",
language = "English",
volume = "893",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
}