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Comparative Study of the Mechanical Reinforcement by Blending, Filling, and Block Copolymerization in Bottlebrush Polymer Electrolytes

Titelangaben

Petry, Jannik ; Erabhoina, Hari Mohan ; Dietel, Markus ; Thelakkat, Mukundan:
Comparative Study of the Mechanical Reinforcement by Blending, Filling, and Block Copolymerization in Bottlebrush Polymer Electrolytes.
In: ACS Applied Polymer Materials. Bd. 6 (2024) Heft 9 . - S. 5109-5120.
ISSN 2637-6105
DOI: https://doi.org/10.1021/acsapm.4c00161

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

Poly(ethylene glycol) (PEG)-based bottlebrush polymer electrolytes exhibit improved room-temperature ionic conductivity and reduced crystallinity compared to those of semicrystalline poly(ethylene oxide) (PEO). However, these graft copolymers suffer from low mechanical stability. Therefore, we synthesized a PEG-based bottlebrush polymer having a polynorbornene backbone using ring-opening metathesis polymerization, and it was mechanically reinforced using three strategies: (a) by blending with a polynorbornene (PNb) homopolymer, (b) filling with TiO2 nanoparticles, or (c) via block copolymerization with a PNb segment. All three systems were converted to solid polymer electrolytes by adding LiTFSI, and their thermal, mechanical, and detailed electrochemical properties in symmetrical Li/SPE/Li cells over a large number of cycles are given. All solid-state lithium metal battery (Li/SPE/LFP) cells were fabricated, and charge/discharge cycles as well as the cycling behavior were comparatively studied. It was found that block copolymerization resulted in the highest storage modulus above 0.1 Hz and overall ionic conductivity (in the whole range of 25 to 80 °C) compared to those of the other two strategies. Furthermore, the highest accessible discharge capacities (159 mA h g–1) and highest capacity retention of 88% after 50 cycles were also achieved with the block copolymer concept.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: block copolymers; controlled polymerization; solid polymer electrolytes; lithium−metal batteries; polynorbornene
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Professur Angewandte Funktionspolymere > Professur Angewandte Funktionspolymere - Univ.-Prof. Dr. Mukundan Thelakkat
Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayerisches Zentrum für Batterietechnik - BayBatt
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Professur Angewandte Funktionspolymere
Forschungseinrichtungen
Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 08 Mai 2024 05:39
Letzte Änderung: 12 Sep 2024 10:37
URI: https://eref.uni-bayreuth.de/id/eprint/89516