A trade-off-free fluorosulfate-based flame-retardant electrolyte additive for high-energy lithium batteries

Abstract

The flammability of organic electrolytes raises increasing safety concerns about the high-capacity batteries of next-generation electric vehicles and smart grid systems, Herein, we report a synthetic dual-functional electrolyte additive bearing...

A straightforward approach to improve NCM523/graphite pouch battery performance in a wide temperature range at 4.35 V using film-forming additive N-phenylimidodisulfuryl fluoride (PhFSI)

“…Recently, compounds containing the –SO 2 F group, 4,4′-(propane-2,2-diyl)bis(4,1-phenylene)disulfofluoridate (P2PFS), p -toluenesulfonyl fluoride (pTSF), 2-fluorobenzenesulfonyl fluoride (2FF) and dimethylsulfamoyl fluoride, have been reported to be used as additives to stabilize the electrodes in LIBs or as new solvent in lithium metal batteries (LMBs). 20–23 Following these reports, the multifunctional features of –SO 2 F make it an attractive candidate for further investigation. Notably, N -phenylimidodisulfuryl fluoride (PhFSI) differs from the previous –SO 2 F-containing compounds and contains two adjacent –SO 2 F groups in the same N atom on the phenyl ring; this unique character may make it a new substrate to explore two S–N bond cleavage of PhFSI to form an interphase film to improve the electrochemical performances of LIBs (Scheme 1).…”

Ameliorating Phosphonic-Based Nonflammable Electrolytes Towards Safe and Stable Lithium Metal Batteries

“…Meanwhile, the Li dendrite will penetrate the membrane, leading to the short circuiting of LMBs and even to thermal runaway [ 11 , 12 , 13 , 14 , 15 , 16 ], such as the spontaneous combustion of smartphones and electric vehicles [ 17 , 18 , 19 , 20 ]. These safety failures largely originated from commercial organic electrolytes, which have low flash points and are prone to combustion [ 21 , 22 , 23 , 24 , 25 ]. Hence, developing non-flammable electrolyte is one of the most effective measures to reduce the flammability of electrolytes and improve the safety of LMBs.…”