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Nanosponge-Based Composite Gel Polymer Electrolyte for Safer Li-O2 Batteries

Electrochemistry Group, Department of Applied Science and Technology, Politecnico di Torino, degli Abruzzi 24, 10128 Torino, Italy
Department of Chemistry, Università degli Studi di Torino, Via Pietro Giuria 7, 10125 Torino, Italy
Author to whom correspondence should be addressed.
Academic Editors: Vincenzo Baglio, Francesco Lufrano and Antonino S. Aricò
Polymers 2021, 13(10), 1625;
Received: 26 April 2021 / Revised: 13 May 2021 / Accepted: 14 May 2021 / Published: 17 May 2021
(This article belongs to the Special Issue Advanced Functional Polymers for Energy Applications)
Li-O2 batteries represent a promising rechargeable battery candidate to answer the energy challenges our world is facing, thanks to their ultrahigh theoretical energy density. However, the poor cycling stability of the Li-O2 system and, overall, important safety issues due to the formation of Li dendrites, combined with the use of organic liquid electrolytes and O2 cross-over, inhibit their practical applications. As a solution to these various issues, we propose a composite gel polymer electrolyte consisting of a highly cross-linked polymer matrix, containing a dextrin-based nanosponge and activated with a liquid electrolyte. The polymer matrix, easily obtained by thermally activated one pot free radical polymerization in bulk, allows to limit dendrite nucleation and growth thanks to its cross-linked structure. At the same time, the nanosponge limits the O2 cross-over and avoids the formation of crystalline domains in the polymer matrix, which, combined with the liquid electrolyte, allows a good ionic conductivity at room temperature. Such a composite gel polymer electrolyte, tested in a cell containing Li metal as anode and a simple commercial gas diffusion layer, without any catalyst, as cathode demonstrates a full capacity of 5.05 mAh cm−2 as well as improved reversibility upon cycling, compared to a cell containing liquid electrolyte. View Full-Text
Keywords: Li-O2 cell; composite gel polymer electrolyte; nanosponge; O2 cross-over Li-O2 cell; composite gel polymer electrolyte; nanosponge; O2 cross-over
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MDPI and ACS Style

Amici, J.; Torchio, C.; Versaci, D.; Dessantis, D.; Marchisio, A.; Caldera, F.; Bella, F.; Francia, C.; Bodoardo, S. Nanosponge-Based Composite Gel Polymer Electrolyte for Safer Li-O2 Batteries. Polymers 2021, 13, 1625.

AMA Style

Amici J, Torchio C, Versaci D, Dessantis D, Marchisio A, Caldera F, Bella F, Francia C, Bodoardo S. Nanosponge-Based Composite Gel Polymer Electrolyte for Safer Li-O2 Batteries. Polymers. 2021; 13(10):1625.

Chicago/Turabian Style

Amici, Julia, Claudia Torchio, Daniele Versaci, Davide Dessantis, Andrea Marchisio, Fabrizio Caldera, Federico Bella, Carlotta Francia, and Silvia Bodoardo. 2021. "Nanosponge-Based Composite Gel Polymer Electrolyte for Safer Li-O2 Batteries" Polymers 13, no. 10: 1625.

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