TY - JOUR
T1 - Polymerized Ionic Liquids
T2 - Correlation of Ionic Conductivity with Nanoscale Morphology and Counterion Volume
AU - Iacob, Ciprian
AU - Matsumoto, Atsushi
AU - Brennan, Marissa
AU - Liu, Hongjun
AU - Paddison, Stephen J.
AU - Urakawa, Osamu
AU - Inoue, Tadashi
AU - Sangoro, Joshua
AU - Runt, James
N1 - Funding Information:
This work was supported by the National Science Foundation, Division of Materials Research, Polymers Program through DMR-1505953. J.S. gratefully acknowledges the National Science Foundation for financial support through the Polymers Program Award DMR-1508394. S.J.P. gratefully acknowledges financial support of the U.S. Army Research Office under Contract No. W911NF-15-1-0501. Computing resource is provided through XSEDE allocation DMR130078. This work was partially supported by JSPS KAKENHI Grant Number 16H04204 and ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan).
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/9/19
Y1 - 2017/9/19
N2 - The impact of the chemical structure on ion transport, nanoscale morphology, and dynamics in polymerized imidazolium-based ionic liquids is investigated by broadband dielectric spectroscopy and X-ray scattering, complemented with atomistic molecular dynamics simulations. Anion volume is found to correlate strongly with Tg-independent ionic conductivities spanning more than 3 orders of magnitude. In addition, a systematic increase in alkyl side chain length results in about one decade decrease in Tg-independent ionic conductivity correlating with an increase in the characteristic backbone-to-backbone distances found from scattering and simulations. The quantitative comparison between ion sizes, morphology, and ionic conductivity underscores the need for polymerized ionic liquids with small counterions and short alkyl side chain length in order to obtain polymer electrolytes with higher ionic conductivity.
AB - The impact of the chemical structure on ion transport, nanoscale morphology, and dynamics in polymerized imidazolium-based ionic liquids is investigated by broadband dielectric spectroscopy and X-ray scattering, complemented with atomistic molecular dynamics simulations. Anion volume is found to correlate strongly with Tg-independent ionic conductivities spanning more than 3 orders of magnitude. In addition, a systematic increase in alkyl side chain length results in about one decade decrease in Tg-independent ionic conductivity correlating with an increase in the characteristic backbone-to-backbone distances found from scattering and simulations. The quantitative comparison between ion sizes, morphology, and ionic conductivity underscores the need for polymerized ionic liquids with small counterions and short alkyl side chain length in order to obtain polymer electrolytes with higher ionic conductivity.
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U2 - 10.1021/acsmacrolett.7b00335
DO - 10.1021/acsmacrolett.7b00335
M3 - Article
AN - SCOPUS:85029671677
SN - 2161-1653
VL - 6
SP - 941
EP - 946
JO - ACS Macro Letters
JF - ACS Macro Letters
IS - 9
ER -