Ultrafast fluxional exchange dynamics in electrolyte solvation sheath oflithium ion battery

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486648.do
DOI
10.1038/ncomms14658
Title
Ultrafast fluxional exchange dynamics in electrolyte solvation sheath oflithium ion battery
Description
This work was supported by IBS-R023-D1. K.-K.L. thanks Dr Ho-Jung Sun(Kunsan National University) for allowing us to use the sputteringsystem and for insightful discussion.
abstract
Lithium cation is the charge carrier in lithium-ion battery. Electrolyte solution in lithium-ion battery is usually based on mixed solvents consisting of polar carbonates with different aliphatic chains. Despite various experimental evidences indicating that lithium ion forms a rigid and stable solvation sheath through electrostatic interactions with polar carbonates, both the lithium solvation structure and more importantly fluctuation dynamics and functional role of carbonate solvent molecules have not been fully elucidated yet with femtosecond vibrational spectroscopic methods. Here we investigate the ultrafast carbonate solvent exchange dynamics around lithium ions in electrolyte solutions with coherent two-dimensional infrared spectroscopy and find that the time constants of the formation and dissociation of lithium-ion center dot center dot center dot carbonate complex in solvation sheaths are on a picosecond timescale. We anticipate that such ultrafast microscopic fluxional processes in lithium-solvent complexes could provide an important clue to understanding macroscopic mobility of lithium cation in lithium-ion battery on a molecular level.
provenance
Made available in Cube on 2018-09-28T16:13:13Z (GMT). No. of bitstreams: 0
language
English
author
Lee, Kyung-Koo
Park, Kwanghee
Lee, Hochan
Noh, Yohan
Kossowska, Dorota
Kwak, Kyungwon
Cho, Minhaeng
orcid
CHO, MINHAENG/0000-0003-1618-1056
accessioned
2018-09-28T16:13:13Z
available
2018-09-28T16:13:13Z
issued
2017
citation
NATURE COMMUNICATIONS(8)
issn
2041-1723
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486648.do
Funder
과학기술정보통신부
Funding Program
기초과학연구원연구운영비지원
Project ID
1711061438
Jurisdiction
Rep.of Korea
Project Name
Study of Molecular Spectroscopy and Dynamics
rights
openAccess
type
article


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