TY - JOUR
T1 - On revealing structural relaxation of ionic liquids by high-field dielectric techniques
AU - Richert, Ranko
N1 - Funding Information:
This work has been supported by the DOD-ARO under Grant No W911NF-19-1-0152.
Funding Information:
This work has been supported by the DOD -ARO under Grant No W911NF-19-1-0152 .
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/9/15
Y1 - 2023/9/15
N2 - Using dielectric relaxation techniques at low and high electric fields, it is demonstrated how the conductivity and structural relaxation times can be obtained under identical sample conditions, e.g., for ionic liquids. This approach is useful for conductive materials for which low field dielectric loss spectra fail to display signatures of structural relaxation. The approach is based on field induced structural recovery in the regime of milliseconds, i.e., the process of fast physical aging in response to a small perturbation. For the case of viscous 1‑butyl‑3-methyl imidazolium tetrafluoroborate, this experiment reveals a decoupling quantified by structural relaxation being about nine times slower than conductivity relaxation.
AB - Using dielectric relaxation techniques at low and high electric fields, it is demonstrated how the conductivity and structural relaxation times can be obtained under identical sample conditions, e.g., for ionic liquids. This approach is useful for conductive materials for which low field dielectric loss spectra fail to display signatures of structural relaxation. The approach is based on field induced structural recovery in the regime of milliseconds, i.e., the process of fast physical aging in response to a small perturbation. For the case of viscous 1‑butyl‑3-methyl imidazolium tetrafluoroborate, this experiment reveals a decoupling quantified by structural relaxation being about nine times slower than conductivity relaxation.
KW - Conductivity relaxation
KW - Dielectric relaxation
KW - Ionic liquids
KW - Nonlinear dielectric effects
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U2 - 10.1016/j.jnoncrysol.2023.122483
DO - 10.1016/j.jnoncrysol.2023.122483
M3 - Article
AN - SCOPUS:85163165655
SN - 0022-3093
VL - 616
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
M1 - 122483
ER -