Ion Specific, Thin Film Confinement Effects on Conductivity in Polymerized Ionic Liquids
Ion Specific, Thin Film Confinement Effects on Conductivity in Polymerized Ionic Liquids
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离子特异性薄膜限制对聚合离子液体电导率的影响
DOI:
10.1021/acs.macromol.1c01820
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发表时间:
2021
期刊:
影响因子:
5.5
通讯作者:
Evans, Christopher M.
中科院分区:
文献类型:
--
作者:
Zhao, Qiujie;Bennington, Peter;Nealey, Paul F.;Patel, Shrayesh N.;Evans, Christopher M.
Acrylate-based polymerized ionic liquids (PILs) with ammonium (Am) or imidazolium (Im) cations and tetrafluoroborate (BF4) or bis(trifluoromethanesulfonyl)imide (TFSI) anions were synthesized and spin coated onto gold interdigitated electrodes on silica to investigate nanoconfinement effects on ion transport. The film thickness ranged from 23 to 313 nm. A significant reduction of the in-plane conductivity was observed in some PIL thin films with thickness below 100 nm. Specifically, Am BF4PIL showed the largest conductivity drop (ca. 50% difference between a 22 nm and a 261 nm film) while Im TFSI PIL showed almost no change under confinement. The difference in conductivity drop is discussed in terms of (i) differences in interfacial layer thickness by fitting a two-layer conductivity model and (ii) potential changes in glass transition temperature (Tg) under confinement, which were estimated using the Vogel–Fulcher–Tammann fits of bulk conductivities. Decreasing film thickness also caused the dielectric loss peaks to shift to lower frequency, indicating that the ion diffusion process slowed under confinement.
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影响因子:
7.015
作者:
Naisong Shan;Chengtian Shen;C. M. Evans
通讯作者:
C. M. Evans
DOI:
10.1021/acs.jpcc.8b06065
发表时间:
2018
期刊:
The Journal of Physical Chemistry C
影响因子:
--
作者:
Zhou Yu;Chao Fang;Jingsong Huang;B. Sumpter;R. Qiao
通讯作者:
R. Qiao
影响因子:
5.5
作者:
Qiujie Zhao;C. M. Evans
通讯作者:
Qiujie Zhao;C. M. Evans
影响因子:
7.015
作者:
Evans, Christopher M.;Bridges, Colin R.;Segalman, Rachel A.
通讯作者:
Segalman, Rachel A.