An overview on polymer-based electrolytes with high ionic mobility for safe operation of solid-state batteries

Marisa Falco^a^,^b, Gabriele Lingua^a^,^b, Silvia Porporato^a^,^b, Ying Zhang^a^,^b, Mingjie Zhang^a^,^b, Matteo Gastaldi^a^,^b, Francesco Gambino^a^,^b, Elisa Maruccia^a^,^b, Alessandro Piovano^a^,^b, Giuseppina Meligrana^a^,^b, Giuseppe Antonio Elia^a^,^b, Claudio Gerbaldi^a^,^b

^aPOLITECNICO DI TORINO Department of Applied Science and Technology – DISAT

^bNational Reference Center for Electrochemical Energy Storage (GISEL) – INSTM

Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)

#SusBat - Enabling Beyond Classical Li-ion Batteries through materials development and sustainability

VALÈNCIA, Spain, 2023 March 6th - 10th

Organizers: Maria Lukatskaya and Nagore Ortiz Vitoriano

Oral, Claudio Gerbaldi, presentation 244
DOI: https://doi.org/10.29363/nanoge.matsus.2023.244
Publication date: 22nd December 2022

The transformation from liquid- to solid-state architecture is expected to improve safety, fabrication, and temperature stability of energy storage devices, particularly if constraints of low ionic conductivity, low cation transport properties and stringent processing conditions are overcome [1].

Here, an overview is offered of the recent developments in our labs on innovative polymer-based electrolytes allowing high ionic mobility, particularly attractive for Li-metal batteries, and obtained by different techniques, including solvent-free UV-induced photopolymerization. Electrochemical performances in lab-scale devices can be readily improved using different kind of RTILs or other specific low-volatile additives. Cyclic voltammetry and galvanostatic charge/discharge cycling coupled with electrochemical impedance spectroscopy exploiting different electrode materials (e.g., LFP, Li-rich NMC, Si/C) demonstrate specific capacities approaching theoretical values even at high C-rates and stable operation for hundreds of cycles at ambient temperature [2,3]. Direct polymerization procedures on top of the electrode films are also used to obtain an intimate electrode/electrolyte interface and full active material utilization in both half and full cell architectures. In addition, results of composite hybrid polymer electrolytes, as well as new single-ion conducting polymers are shown [4,5], which are specifically developed to attain improved ion transport and high oxidation stability for safe operation with high voltage electrodes even at ambient conditions.

References:

[1] Ferrari, S.; Falco, M.; Muñoz-García, A.B.; Bonomo, M.; Brutti, S.; Pavone, M.; Gerbaldi, C. Solid-State Post Li Metal Ion Batteries: A Sustainable Forthcoming Reality? Adv. Energy Mater. 2021, 11, 2100785.

[2] Falco, M.; Simari, C.; Ferrara, C.; Nair, J.R.; Meligrana, G.; Nicotera, I.; Mustarelli, P.; Winter, M.; Gerbaldi, C. Understanding the Effect of UV-Induced Cross-Linking on the Physicochemical Properties of Highly Performing PEO/LiTFSI-Based Polymer Electrolytes. Langmuir 2019, 35, 8210-8219.

[3] Lingua, G.; Falco, M.; Stettner, T.; Gerbaldi, C.; Balducci, A. Enabling safe and stable Li metal batteries with protic ionic liquid electrolytes and high voltage cathodes. J. Power Sources 2021, 481, 228979.

[4] Falco, M.; Castro, L.; Nair, J.R.; Bella, F.; Bardé, F.; Meligrana, G.; Gerbaldi, C. UV-Cross-Linked Composite Polymer Electrolyte for High-Rate, Ambient Temperature Lithium Batteries. ACS Appl. Energy Mater. 2019, 2 1600-1607.

[5] Lingua, G.; Grysan, P.; Vlasov, P.S.; Verge, P.; Shaplov, A.S.; Gerbaldi, C. Unique Carbonate-Based Single Ion Conducting Block Copolymers Enabling High-Voltage, All-Solid-State Lithium Metal Batteries. Macromolecules, 2021, 54, 6911-6924.

Acknowledgements:

The Si-DRIVE project has received funding from the EU’s Horizon 2020 research and innovation program under GA 814464 (https://sidrive2020.eu/).

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