Interplay between Conductivity, Matrix Relaxations and Composition of Ca‐Polyoxyethylene Polymer Electrolytes
| Autor: | Claire Antonelli, Vito Di Noto, Gioele Pagot, Cynthia S. Martínez-Cisneros, Alejandro Várez, Keti Vezzù, Belén Levenfeld, Jean-Yves Sanchez |
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| Přispěvatelé: | European Commission |
| Rok vydání: | 2021 |
| Předmět: |
energy conversion
Materials science Polymer electrolytes 02 engineering and technology calcium electrolytes Conductivity 010402 general chemistry conducting materials 01 natural sciences Ingeniería Industrial Catalysis Conducting materials Matrix (mathematics) Electrochemistry broadband electrical spectroscopy solid polymer electrolytes Materiales Química Composition (combinatorics) 021001 nanoscience & nanotechnology Energy conversion 0104 chemical sciences Chemical engineering Broadband electrical spectroscopy Calcium electrolytes Solid polymer electrolytes 0210 nano-technology |
| Zdroj: | ChemElectroChem e-Archivo. Repositorio Institucional de la Universidad Carlos III de Madrid instname |
| ISSN: | 2196-0216 |
| Popis: | This article also appears in: In Memoriam: Prof. Jean-Michel Savéant. In this report, the conductivity mechanism of Ca2+-ion in polyoxyethylene (POE) solid polymer electrolytes (SPEs) for calcium secondary batteries is investigated by broadband electrical spectroscopy studies. SPEs are obtained by dissolving into the POE hosting matrix three different calcium salts: CaTf2, Ca(TFSI)2 and CaI2. The investigation of the electric response of the synthetized SPEs reveals the presence in materials of two polarization phenomena and two dielectric relaxation events. It is demonstrated that the nature of the anion (i. e., steric hindrance, charge density and ability to act as coordination ligand) and the density of “dynamic crosslinks” of SPEs is fundamental in the establishment of ion-ion/ion-polymer interactions. The long-range charge migration processes occurring along the two revealed percolation pathways of the electrolytes are generally coupled with the polymer host dynamics and depend on the temperature and the anion nature. This study offers the needed tools for understanding Ca2+ conduction in POE-based electrolytes. This work has been supported by the European Union’s Horizon 2020 research and innovation programme under grant agreement No 829145(FETOPEN-VIDICAT).V. Di Notothanks the University CarlosIII of Madrid for the “Catedras de Excelencia UC3M-Santander” (Chairof Excellence UC3M-Santander). |
| Databáze: | OpenAIRE |
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