Open AccessElectrochemical Reactions of Iodine Molecules Encapsulated in Single-Walled Carbon Nanotubes
Author(s) -
Nao Kato,
Yosuke Ishii,
Yukihiro Yoshida,
Yuki Sakamoto,
Kazuki Matsushita,
Mikako Takahashi,
Remi Date,
Shinji Kawasaki
Publication year - 2019
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.8b03129
Subject(s) - carbon nanotube , electrochemistry , halide , materials science , electrolyte , alkali metal , raman spectroscopy , electrode , ion , molecule , inorganic chemistry , iodide , battery (electricity) , chemical engineering , nanotechnology , chemistry , organic chemistry , power (physics) , physics , quantum mechanics , engineering , optics
We prepared iodine molecules encapsulated in single-walled carbon nanotubes (I@SWCNTs) by electro-oxidation of iodide ions with empty SWCNT electrode. Li-ion battery electrode properties of I@SWCNTs were investigated. It was found that the I@SWCNT sample can catch and release Li ions reversibly. We performed Raman measurements to reveal the Li-ion storage mechanism of I@SWCNT. It is plausible that chemical reactions of I 2 from/into LiI in SWCNTs occur during Li-ion charging/discharging of I@SWCNT. We also prepared the CsI@SWCNT sample to verify that alkali metal ions can be extracted from alkali metal halide in SWCNTs. The extraction of cesium ions from CsI@SWCNT was confirmed by Raman measurements. It was also found that I@SWCNT can work as a Li-ion battery electrode in solid electrolyte as well.
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