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Batteries 2018, 4(3), 41; https://doi.org/10.3390/batteries4030041

A New Glass-Forming Electrolyte Based on Lithium Glycerolate

1,2
,
1
,
1,3,4
and
1,2,3,5,*
1
Section of Chemistry for the Technology (ChemTech), Department of Industrial Engineering, University of Padova, Via Marzolo 9, I-35131 Padova (PD), Italy
2
Centro Studi di Economia e Tecnica dell’Energia Giorgio Levi Cases, Via Marzolo 9, I-35131 Padova (PD), Italy
3
Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, Via Marzolo 1, I-35131 Padova (PD), Italy
4
Centre for Mechanics of Biological Materials—CMBM, Via Marzolo 9, I-35131 Padova (PD), Italy
5
Material Science and Engineering Department, Universidad Carlos III de Madrid, Escuela Politécnica Superior, Av.de la Universidad, 30, 28911 Leganes, Spain
*
Author to whom correspondence should be addressed.
Received: 19 July 2018 / Revised: 7 August 2018 / Accepted: 24 August 2018 / Published: 1 September 2018
(This article belongs to the Special Issue Recent Advances in Post-Lithium Ion Batteries)
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Abstract

The detailed study of the interplay between the physicochemical properties and the long-range charge migration mechanism of polymer electrolytes able to carry lithium ions is crucial in the development of next-generation lithium batteries. Glycerol exhibits a number of features (e.g., glass-forming behavior, low glass transition temperature, high flexibility of the backbone, and efficient coordination of lithium ions) that make it an appealing ion-conducting medium and a challenging building block in the preparation of new inorganic–organic polymer electrolytes. This work reports the preparation and the extensive investigation of a family of 11 electrolytes based on lithium glycerolate. The electrolytes have the formula C3H5(OH)3−x(OLi)x, where 0 ≤ x ≤ 1. The elemental composition is evaluated by inductively coupled plasma atomic emission spectroscopy. The structure and interactions are studied by vibrational spectroscopies (FT-IR and micro-Raman). The thermal properties are gauged by modulated differential scanning calorimetry and thermogravimetric analysis. Finally, insights on the long-range charge migration mechanism and glycerol relaxation events are investigated via broadband electrical spectroscopy. Results show that in these electrolytes, glycerolate acts as a large and flexible macro-anion, bestowing to the material single-ion conductivity (1.99 × 10−4 at 30 °C and 1.55 × 10−2 S∙cm−1 at 150 °C for x = 0.250). View Full-Text
Keywords: polymer electrolyte; lithium glycerolate; lithium single-ion conductor polymer electrolyte; lithium glycerolate; lithium single-ion conductor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Pagot, G.; Tonello, S.; Vezzù, K.; Di Noto, V. A New Glass-Forming Electrolyte Based on Lithium Glycerolate. Batteries 2018, 4, 41.

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