Synthesis, fabrication and characterisation of DOPO-based electrospun polyimide separator for lithium metal battery

Title data

Badri, Rahul ; Hiwase, Shweta ; Agarwal, Seema ; Banerjee, Susanta:
Synthesis, fabrication and characterisation of DOPO-based electrospun polyimide separator for lithium metal battery.
In: European Polymer Journal. Vol. 255 (2026) . - 114897.
ISSN 1873-1945
DOI: https://doi.org/10.1016/j.eurpolymj.2026.114897

Official URL:

Abstract in another language

This study describes the synthesis and electrospinning fabrication of the DOPO-based polyimide (ES-DOPO-60) separator. The ES-DOPO-60 separator was evaluated for its thermal, mechanical, wettability, solvent-absorption, and porosity characteristics. The above-mentioned qualities of ES-DOPO-60 have been analysed and found to demonstrate superior separator characteristics in comparison to the traditional Celgard 2500. Furthermore, the ES-DOPO-60 non-woven fabric was immersed in a 1 M LiPF6/EC: DMC solution for 72 h and subsequently used for electrochemical characterisation. The ES-DOPO-60 demonstrated a solvent uptake of 525 wt., significantly surpassing that of the traditional Celgard 2500 separator, resulting in an exceptional ionic conductivity of 1.36 × 10-4 Scm−1 at 30 °C. Additionally, the ES-DOPO-60 separator exhibited a wider electrochemical stability window of 5 V, facilitating the use of higher-energy–density cathodes for advanced lithium-metal battery applications. The lithium transference number of ES-DOPO-60 is calculated to be0.478, which is relatively superior to that of the Celgard 2500 system, which may help in dendritic suppression. These exceptional thermal, mechanical, and electrochemical characteristics of the ES-DOPO-60 separator make it a promising candidate for their potential applicationsin lithium metal battery systems.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	Polymer separator; Polyimide; Electrospinning; Flameretardancy; Electrochemical stability window; Lithium Transference number
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II Profile Fields > Advanced Fields > Polymer and Colloid Science Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt Graduate Schools > Bayreuth Graduate School of Mathematical and Natural Sciences (BayNAT) > Polymer Science
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 540 Chemistry
Date Deposited:	29 Jun 2026 07:32
Last Modified:	29 Jun 2026 07:32
URI:	https://eref.uni-bayreuth.de/id/eprint/98912