title: Novel Concentrated Li[(FSO2)(n-C4F9SO2)N]-Based Ether Electrolyte for Superior Stability of Metallic Lithium Anode.
abstract: Lithium (fluorosulfonyl)(n-nonafluorobutanesulfonyl)imide [Li[(FSO2)(n-C4F9SO2)N] (LiFNFSI)] is investigated as a conducting salt, which can form a relatively stable solid-electrolyte-interphase film in concentrated ether electrolyte to achieve favorable protection for lithium metal anodes. Li|Cu and Li|Li cells with concentrated LiFNFSI-based electrolyte have been demonstrated to display high average Coulombic efficiency (≈97%) and excellent cycling stability (over 1,000 h) of metallic lithium anodes, compared to concentrated lithium bis(trifluoromethanesulfonyl)imide [Li[N(SO2CF3)2] (LiTFSI)]-based electrolyte. The morphologies and compositions of the lithium-metal anode surface are also comparatively analyzed by scanning electron microscopy and X-ray photoelectron spectroscopy, respectively. Moreover, superior electrochemical performance in the concentrated LiFNFSI-based electrolyte for Li|LiFePO4cells is also presented herein. These results indicate that concentrated LiFNFSI-based electrolyte is a promising candidate for metallic lithium rechargeable batteries.
authors.affiliation: Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Fang
authors.affiliation: Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.|Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), School of Chemistry and Chemical Engineering Huazhong University of Science and Technology 1037 Luoyu Road, Wuhan 430074, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Ma
authors.affiliation: Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Pin
authors.initials: P
authors.lastname: Liu
authors.affiliation: Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Ma
authors.affiliation: Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Yong-Sheng
authors.initials: YS
authors.lastname: Hu
authors.affiliation: Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), School of Chemistry and Chemical Engineering Huazhong University of Science and Technology 1037 Luoyu Road, Wuhan 430074, China.
authors.forename: Zhibin
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.affiliation: Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Xuejie
authors.initials: X
authors.lastname: Huang
authors.affiliation: Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Liquan
authors.initials: L
authors.lastname: Chen
keywords: Coulombic efficiency; concentrated electrolyte; lithium (fluorosulfonyl)(n-nonafluorobutanesulfonyl)imide; metallic lithium anode; metallic lithium rechargeable batteries