Interface properties between a lithium metal electrode and a poly(ethylene oxide) based composite polymer electrolyte |
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| Affiliation: | 1. Faculty of Engineering, Mie University, 1515 Kamihama, Tsu 514-8507, Japan;2. Genesis Research Institute, Noritake-shinmachi Nishi-ku, Nagoya 451-0061, Japan;1. College of Physics, Qingdao University, Qingdao 266071, China;2. College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China;3. Department of Chemistry. University of Pennsylvania, Philadelphia 19104, USA;1. School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;2. School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China;3. Hunan Zhengyuan Institute for Energy Storage Materials and Devices, Changsha, Hunan 410083, China;1. Department of Materials Science & Engineering, University of Michigan, Ann Arbor, MI 48109, USA;2. Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA |
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| Abstract: | The interface resistance between a lithium metal electrode and a polymer electrolyte has been measured for composite polymer electrolytes using various ceramic fillers with poly(ethylene oxide) (PEO) and lithium salts (LiX). The interface resistance depended on the properties of added fillers and lithium salts. The PEO with LiClO4 electrolyte contacted with lithium metal showed the high interfacial resistance of 1000 Ω cm2 at 70°C for 25 days. In contrast, the interface resistance between lithium metal and PEO with Li(CF3SO2)2N was as low as 67 Ω cm2 after contacting at 80°C for 30 days. The interface stability and the lithium ion conductivity were improved by addition of a small amount of ferroelectric BaTiO3 as the filler into the PEO–LiX electrolyte. |
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