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Joshi, Sagar Avadhutrao ; Pazhaniswamy, Sivaraj ; Plank, Christian ; Danzer, Michael A. ; Hou, Haoqing ; Cheong, Jun Young ; Breu, Josef ; Agarwal, Seema:
High‐Performance, Flame‐Retardant, Binder‐Free Li‐Hectorite‐Polybenzimidazole Fiber Separator for Li‐Ion Batteries.
In: Macromolecular Materials and Engineering.
(2024)
.
- 2300389.
ISSN 1439-2054
DOI: https://doi.org/10.1002/mame.202300389
Abstract
Li-Hectorite (Li-Hec) clays have inherent 2D diffusion slits offering high lithium (Li+) ion conductivity. Such Li-Hec clays spontaneously delaminate into flexible nanosheets, allowing them to be coated on high-temperature stable polybenzimidazole (PBI) nanofibers laid randomly onto each other in the form of non-woven membranes. Here such Li-Hec coated PBI nonwovens are shown to be excellent Li-ion battery separators. An effective strategy based on electrospinning PBI followed by a filtration-through coating of delaminated Li-Hec nanosheets of appropriate diameter is applied to prepare the separators without the use of any binder. The composite separator shows excellent properties, such as superior wettability (solvent uptake 413%), thermostability (>500 °C), superior flame resistance, and interfacial compatibility. Additionally, the presented separator shows excellent ion conductivity, Li-ion transference number, cycling stability, and a rate performance that outperforms the common commercial separators. In summary, this work allows for a better balance between safety, high performance, and separator functionality.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Makromolekulare Chemie II Profilfelder > Advanced Fields > Polymer- und Kolloidforschung Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayerisches Zentrum für Batterietechnik - BayBatt |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 15 Jan 2024 11:13 |
| Letzte Änderung: | 15 Jan 2024 11:13 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/88226 |