Stable cycling of lithium metal electrode in nanocomposite solid polymer electrolytes with lithium bis (fluorosulfonyl)imide
Xabier Judez , Michał Piszcz , Estibaliz Coya , Chunmei Li , Itziar Aldalur , Uxue Oteo , Yan Zhang , Wei Zhang , Lide M. Rodriguez-Martinez , Heng Zhang , Michel Armand
AbstractNanocomposite solid polymer electrolytes (NSPEs) comprising lithium salt based on two representative sulfonylimide anions (i.e., bis(fluorosulfonyl)imide ([N(SO2F)2]−, FSI−) and bis(trifluoromethanesulfonyl)imide ([N(SO2CF3)2]−, TFSI−)) have been prepared by simply dissolving the corresponding lithium salt in poly(ethylene oxide) matrix in the presence of inert nano-sized Al2O3 fillers. The physicochemical and electrochemical properties of the FSI- and TFSI-based NSPEs are investigated, in terms of phase transition, ion transport behavior, chemical and electrochemical compatibility with Li metal. With the addition of nano-sized Al2O3 fillers, a significant improvement in chemical and electrochemical compatibility with Li metal has been observed in both the FSI- and TFSI-based NSPEs. Particularly, the symmetric cell using the FSI-based NSPE can be continuously cycled for > 1000 h at 70 °C. The Li | LiFePO4 cell with the FSI-based NSPEs shows good cycling stability and capacity retention. These promising results make them attractive electrolytes for safe and stable rechargeable Li metal batteries.
|Journal series||Solid State Ionics, ISSN 0167-2738, (A 30 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||solid polymer electrolytes, nanocomposite material, lithium bis(ﬂuorosulfonyl)imide, lithium bis(triﬂuoromethanesulfonyl)imide, lithium metal batteries|
|ASJC Classification||; ;|
|Score|| = 30.0, 10-08-2018, ArticleFromJournal|
= 35.0, 10-08-2018, ArticleFromJournal
|Publication indicators||: 2017 = 0.952; : 2017 = 2.751 (2) - 2017=2.607 (5)|
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