Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Grafted copolymer electrolytes based on the poly(acrylic acid-co-oligo ethylene glycol acrylate) (P(AA-co-OEGA)) ion-conducting and mechanically robust block
Δημιουργός/Συγγραφέας:	Pipertzis, Achilleas Kafetzi, Martha Giaouzi, Despoina [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Floudas, George A.
Εκδότης:	American Chemical Society
Ημερομηνία:	2022
Γλώσσα:	Αγγλικά
DOI:	10.1021/acsapm.2c00987
Περίληψη:	A series of completely amorphous polymer brushes composed of grafted copolymer electrolytes based on the ion-containing block of poly(acrylic acid-co-oligo ethylene glycol acrylate) (P(AA-co-OEGA)) doped with LiCF3SO3 (LiTf) or LiN(SO2CF3) (LiTFSI) and the glassy polystyrene (PS) block are synthesized and studied with respect to the structural, thermomechanical, and ion conduction properties. The incorporation of some AA units into the ion-conducting phase provides a trade-off between increased mechanical stability and anion/cation complexation. Consequently, the P(AA-co-OEGA) block can be engineered to simultaneously support ion conduction while exhibiting enhanced mechanical stability. Between the two anions ([Tf–] vs [TFSI–]), it is the latter that better supports the Li-ion transport. Diblock copolymer electrolytes doped with the larger anion ([TFSI–]) suppress ion complexation and give rise to superior ion conduction properties (by about 2 orders of magnitude), as compared to that of the smaller anion ([Tf–]). Overall, the PS-b-P(AA-co-OEGA)/LiTFSI diblock-random copolymer electrolyte with salt concentration, r = 0.08 (r is defined as the molar ratio of Li ions to EO units), best combines the required mechanical stability (storage modulus, G′ ∼ 108 Pa) with a relatively high dc-conductivity (σdc ∼ 10–6 S·cm–1) at an ambient temperature (for application as solid polymer electrolytes (SPEs) in Li-ion batteries). This work suggests routes toward further improving the mechanical stability via the random incorporation of acids into the ion-containing block of nanophase-separated electrolytes.
Τίτλος πηγής δημοσίευσης:	ACS Applied Polymer Materials
Τόμος/Κεφάλαιο:	4
Σελίδες:	7070-7080
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Νανοτεχνολογία[EN] Nanotechnology
Λέξεις-Κλειδιά:	Solid polymer electrolytes Ion conductivity Grafted copolymers Mechanical stability Poly(oligo ethylene glycol methacrylate) (POEGMA) Polystyrene
Κάτοχος πνευματικών δικαιωμάτων:	2022 American Chemical Society
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://pubs.acs.org/doi/10.1021/acsapm.2c00987
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο