Glass Fiber Reinforced Epoxy-Amine Thermosets and Solvate IL: Towards New Composite Polymer Electrolytes for Lithium Battery Applications

• Type: Article in International Scientific Journal
• Date: 2023-06-27

Authors

Natália Magalhães (Author) Other; Beatriz Arouca Maia (Author) FEUP; Maria Helena Braga (Author) FEUP; Raquel M. Santos (Author) Other; Nuno Correia (Author) Other; Eunice Cunha (Author) Other

Journal

Title: International Journal Of Molecular Sciences

Vol. 24 No. 2335

Initial page: 10703

ISSN: 1661-6596

Publisher: MDPI

Indexing

ISI Web of Knowledge - 0 Citations

ISI Web of Science

Scopus - 0 Citations

Scientific classification

CORDIS: Physical sciences

Associated Projects

CAVALI - Cadeia de Valor do Lítio - CAVALI - Cadeia de Valor do Lítio

LAETA2023 - Programático - ET - Emerging Technologies - LAETA2023 - Programático - ET - Emerging Technologies

Other information

Authenticus ID: P-00Y-K9C

DOI: 10.3390/ijms241310703

Abstract (EN): To effectively use (Li) lithium metal anodes, it is becoming increasingly necessary to create membranes with high lithium conductivity, electrochemical and thermal stabilities, as well as adequate mechanical properties. Composite gel polymer electrolytes (CGPE) have emerged as a promising strategy, offering improved ionic conductivity and structural performance compared to polymer electrolytes. In this study, a simple and scalable approach was developed to fabricate a crosslinked polyethylene oxide (PEO)-based membrane, comprising two different glass fiber reinforcements, in terms of morphology and thickness. The incorporation of a solvated ionic liquid into the developed membrane enhances the ionic conductivity and reduces flammability in the resulting CGPE. Galvanostatic cycling experiments demonstrate favorable performance of the composite membrane in symmetric Li cells. Furthermore, the CGPE demonstrated electrochemical stability, enabling the cell to cycle continuously for more than 700 h at a temperature of 40 & DEG;C without short circuits. When applied in a half-cell configuration with lithium iron phosphate (LFP) cathodes, the composite membrane enabled cycling at different current densities, achieving a discharge capacity of 144 mAh & BULL;g(-1). Overall, the findings obtained in this work highlight the potential of crosslinked PEO-based composite membranes for high-performance Li metal anodes, with enhanced near room temperature conductivity, electrochemical stability, and cycling capability.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13