Terahertz conductivity of polymer electrolytes

Hassan A. Hafez; Johanna Weidelt; Jijeesh Ravi Nair; Diddo Diddens; Wentao Zhang; Felix Pfeiffer; Tiago de Oliveira Schneider; Markus Meinert; Tomoki Hiraoka; Linda Nesterov; Masoud Baghernejad; Dmitry Turchinovich

doi:10.1117/12.3016564

18 June 2024 Terahertz conductivity of polymer electrolytes

Hassan A. Hafez, Johanna Weidelt, Jijeesh Ravi Nair, Diddo Diddens, Wentao Zhang, Felix Pfeiffer, Tiago de Oliveira Schneider, Markus Meinert, Tomoki Hiraoka, Linda Nesterov, Masoud Baghernejad, Dmitry Turchinovich

Author Affiliations +

Proceedings Volume 12994, Terahertz Photonics III; 129940B (2024) https://doi.org/10.1117/12.3016564
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

The polyethylene oxide (PEO)-based polymer electrolytes containing lithium salts pave the way for the development of safe lithium batteries with high energy storage capacity. Enabled by the flexibly vibrating polymer matrix, the Li-ion transport occurs via hopping along and between the polymer chains. Here, terahertz (THz) time-domain spectroscopy over a frequency range extending from 0.1 THz to 7 THz is applied to investigate the conduction properties of PEO-based electrolytes with lithium salts, and to elucidate the associated dependence of the THz conductivity on the content of the added lithium salt and the electrolyte temperature. It is remarkably found that the higher the observed THz vibrational activity of the electrolyte, the higher its technologically relevant ionic conductivity.

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Hassan A. Hafez, Johanna Weidelt, Jijeesh Ravi Nair, Diddo Diddens, Wentao Zhang, Felix Pfeiffer, Tiago de Oliveira Schneider, Markus Meinert, Tomoki Hiraoka, Linda Nesterov, Masoud Baghernejad, and Dmitry Turchinovich "Terahertz conductivity of polymer electrolytes", Proc. SPIE 12994, Terahertz Photonics III, 129940B (18 June 2024); https://doi.org/10.1117/12.3016564

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