@article{53272232363147cd9cedc7b936df645d,
title = " Correlation of carbonization condition with metallic property of sodium clusters formed in hard carbon studied using 23 Na nuclear magnetic resonance ",
abstract = " The metallic property of sodium clusters stored in hard carbon (HC) was investigated by 23 Na NMR using various HC samples prepared over a range of dehydration and carbonization temperatures. The fully sodiated sample prepared at higher carbonization temperature shows a higher 23 Na NMR shift associated with Na clusters. Na in HC prepared at 2000 °C shows almost the same shift as sodium metal. A higher dehydration temperature of the precursor is favorable to form Na clusters with the higher shift, which implies that the HC pore structure is influenced by not only carbonization temperature but also the heat treatment process. ",
author = "Ryohei Morita and Kazuma Gotoh and Kei Kubota and Shinichi Komaba and Kenjiro Hashi and Tadashi Shimizu and Hiroyuki Ishida",
note = "Funding Information: We thank Dr. Takahiro Ohkubo in Graduate School of Natural Science & Technology, Okayama University and Prof. Katsuyuki Kawamura in School of Engineering, Tokyo Institute of Technology for the evaluation of HC samples using PXRD and SAXS, respectively. Preparation of some samples for NMR measurement was done at National Institute for Materials Science (NIMS) Battery Research Platform. This work was supported by JSPS KAKENHI No. 17K06017 and Element Strategy Initiative for Catalysts and Batteries (ESICB) in Kyoto University, Japan . Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",
year = "2019",
month = apr,
doi = "10.1016/j.carbon.2019.01.080",
language = "English",
volume = "145",
pages = "712--715",
journal = "Carbon",
issn = "0008-6223",
publisher = "Elsevier Limited",
}