Fluorinated Aryl Sulfonimide Tagged (FAST) salts: modular synthesis and structure–property relationships for battery applications. Issue 5 (28th March 2018)

• Record Type: Journal Article
• Authors: Huang, Mingjun; Feng, Shuting; Zhang, Wenxu; Giordano, Livia; Chen, Mao; Amanchukwu, Chibueze V.; Anandakathir, Robinson; Shao-Horn, Yang; Johnson, Jeremiah A.
• Is Part Of: Energy & environmental science. Volume 11:Issue 5(2018)
• Page Start: 1326
• Page End: 1334
• Publication Date: 2018-03-28
• Subjects: Energy conversion -- Periodicals; Fuel switching -- Periodicals; Environmental sciences -- Periodicals; Environmental chemistry -- Periodicals; 333.79
• DOI: 10.1039/c7ee03509h
• Languages: English
• ISSNs: 1754-5692

Abstract

Abstract : Fluorinated Aryl Sulfonimide Tag (FAST) anions provide a new class of modular salts with tunable properties for potential battery applications. Abstract : Solid-state electrolytes are attracting great interest for their applications in potentially safe and stable high-capacity energy storage technologies. Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is widely used as a lithium ion source, especially in solid-state polymer electrolytes, due to its solubility and excellent chemical and electrochemical stability. Unfortunately, chemically inert LiTFSI cannot be easily modified to optimize its properties or allow for conjugation to other molecules, polymers, or substrates to prepare single-ion conducting polymer electrolytes. Chemical modifications of TFSI often erode its advantageous properties. Herein, we introduce Fluorinated Aryl Sulfonimide Tagged (FAST) salts, which are derived from successive nucleophilic aromatic substitution (SN Ar) reactions. Experimental studies and density functional theory calculations were used to assess the electrochemical oxidative stabilities, chemical stabilities, and degrees of ion dissociation of FAST salts as a function of their structures. FAST salts offer a platform for accessing functional sulfonimides without sacrificing many of the advantageous properties of TFSI.