PMMA-LiBOB Gel Polymer Electrolytes in Lithium-Oxygen Cell

International Conference on Condensed Matters and Advanced Materials 2018

Kufian, M.Z.^1 ; Arof, A.K.^1 ; Ramesh, S.^1

Center for Ionics University of Malaya, Physics Department, University of Malaya, Kuala Lumpur

50603, Malaysia^1

关键词: Electrical impedance spectroscopy;    Gel polymer electrolytes;    Ion transference number;    Linear sweep voltammetry;    Lithium bis(oxalato)borate;    Lithium-oxygen batteries;    Tetraethylene glycol dimethyl ether;    Transference number;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/515/1/012010/pdf
DOI  :  10.1088/1757-899X/515/1/012010

来源: IOP

【 摘 要 】

In this study, gel polymer electrolytes (GPEs) have been prepared using PMMA, lithium bis(oxalato)borate, (LiBOB) and tetraethylene glycol dimethyl ether, (TEGDME) as polymer host, ion source and solvent, respectively. PMMA-LiBOB-TEGDME GPEs were using electrical impedance spectroscopy, Fourier-transform infrared spectroscopy, linear sweep voltammetry, transference number and also charge-discharge measurement. The highest conductivity is achieved by the 15 wt.% LiBOB- 32.69 wt. % PMMA-52.31 wt. %TEGDME GPE with the conductivity value of 1.71 mS cm-1. From the FTIR deconvolution of selected GPE, the highest ionic conductivity of GPE is contributed by the 64% of the free ion. The Li-ion transference number for the highest conducting GPE is 0.38. The GPEs are stable up to 4.2 V (vs.Li/Li+) suggesting suitability for the application in the lithium-oxygen battery. The capacity is 447 mAh g-1 at the first discharge cycle.