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Membranes 2013, 3(4), 298-310; doi:10.3390/membranes3040298

Interface Properties between Lithium Metal and a Composite Polymer Electrolyte of PEO18Li(CF3SO2)2N-Tetraethylene Glycol Dimethyl Ether

1
Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
2
Samsung Advanced Institute of Technology, Samsung Electronics, Yongin 446-712, Korea
*
Author to whom correspondence should be addressed.
Received: 22 July 2013 / Revised: 18 October 2013 / Accepted: 21 October 2013 / Published: 25 October 2013
(This article belongs to the Special Issue Advancements in Membranes for Electrochemical Energy Applications)
View Full-Text   |   Download PDF [889 KB, 29 October 2013; original version 25 October 2013]   |  

Abstract

The electrochemical properties of a composite solid polymer electrolyte, consisting of poly(ethylene oxide) (PEO)-lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and tetraethylene glycol dimethyl ether (TEGDME) was examined as a protective layer between lithium metal and a water-stable lithium ion-conducting glass ceramic of Li1+x+y(Ti,Ge)2−xAlxP3−ySiyO12 (LTAP). The lithium ion conductivity and salt diffusion coefficient of PEO18LiTFSI were dramatically enhanced by the addition of TEGDME. The water-stable lithium electrode with PEO18LiTFSI-2TEGDME, as the protective layer, exhibited a low and stable electrode resistance of 85 Ω·cm2 at 60 °C, after 28 days, and low overpotentials of 0.3 V for lithium plating and 0.4 V for lithium stripping at 4.0 mA·cm−2 and 60 °C. A Li/PEO18LiTFSI-2TEGDME/LTAP/saturated LiCl aqueous solution/Pt, air cell showed excellent cyclability up to 100 cycles at 2.0 mAh·cm−2. View Full-Text
Keywords: composite solid polymer electrolyte; tetraethylene glycol dimethyl ether; water-stable lithium electrode; lithium dendrite; aqueous lithium-air battery composite solid polymer electrolyte; tetraethylene glycol dimethyl ether; water-stable lithium electrode; lithium dendrite; aqueous lithium-air battery
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Wang, H.; Matsui, M.; Takeda, Y.; Yamamoto, O.; Im, D.; Lee, D.; Imanishi, N. Interface Properties between Lithium Metal and a Composite Polymer Electrolyte of PEO18Li(CF3SO2)2N-Tetraethylene Glycol Dimethyl Ether. Membranes 2013, 3, 298-310.

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