PMMA-LiTFSI based gel polymer electrolyte for lithium-oxygen cell application

Kufian, Mohd Zieauddin and Ramesh, S. and Arof, A. K. (2021) PMMA-LiTFSI based gel polymer electrolyte for lithium-oxygen cell application. Optical Materials, 120. ISSN 0925-3467, DOI

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In this work, poly (methyl methacrylate), PMMA based gel polymer electrolytes (GPEs) have been studied. Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) was selected as lithium-ion donor and tetraethylene glycol dimethyl ether (TEGDME) as a solvent. The highest conducting sample was obtained at 25 wt% LiTFSI with ionic conductivity value of 2.80 mS cm-1. The dielectric constant of GPEs sample follows the conductivity trend. The percentage of free ions is observed to increase up to electrolyte containing 25 wt% LiTFSI salt. Beyond that, the free ions percentage decreased. Lithium-ion transference number for the highest conducting sample is 0.47. The highest ionic conducting sample show good electrode-electrolyte interfacial stability and is suggested suitable in lithium-oxygen batteries. The charge and discharge capacities in the first cycle were 0.87 and 1.23 mAh cm-2, respectively. Formation of Li2O2 can be observed by XRD pattern of the air cathode during the discharge.

Item Type: Article
Funders: PPP (PG011-2013B), High Impact Research Grant (J-00000-73555)
Uncontrolled Keywords: Ionic conductivity; Fourier transform infrared (FTIR) spectroscopy; Lithium transference number; Lithium-oxygen cell
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms Zaharah Ramly
Date Deposited: 24 May 2022 02:24
Last Modified: 24 May 2022 02:24

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