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Article

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

1
Electrochemistry Group, Department of Applied Science and Technology, Politecnico di Torino, C.so D.ca degli Abruzzi 24, 10128 Torino, Italy
2
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; https://doi.org/10.3390/polym13101625
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. https://doi.org/10.3390/polym13101625

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. https://doi.org/10.3390/polym13101625

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. https://doi.org/10.3390/polym13101625

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