Reduction‐Resistant Chlorinated Ether‐based Diluent in Locally Concentrated Ionic Liquid Electrolytes for Highly Stable Lithium Metal Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract Locally concentrated ionic liquid electrolytes (LCILEs) are promising electrolyte systems for lithium metal batteries (LMBs) due to their robust anion‐derived solid interphase (SEI) and compatibility with Ni‐rich cathodes. Low‐halogen‐content chlorides, low price weakly coordinating ability Li + , emerge as exceptional candidates diluents in LCILEs. Here, it is demonstrated that the anti‐reduction capability of chloride‐based diluent LCILEs significantly affects stability anode. Typically, 1,4‐dichlorobutane (DCB14) 1,5‐dichloropentane (DCP15) possess high electrophilicity, making them susceptible electron attack prone severe side reactions In contrast, 2,2‐dichlorodiethyl ether (DCDEE), where an oxygen atom replaces central carbon DCP15, demonstrates excellent reduction constitutes electron‐rich system electrophilicity. LCILE DCDEE diluent, weak coordination interaction facilitates ion transport, while resulting dual‐halide LiF/LiCl hybrid electrode‐electrolyte interphases (EEIs) effectively enhance electrodes. Consequently, Li||Cu cells sustain up 740 cycles a coulombic efficiency (CE) 99%. Furthermore, 1.2 Ah Li||LiNi 0.9 Co 0.05 Mn O 2 (NCM90) pouch assembled assess practical applicability, which exhibit impressive cycling CE 99.8%.

Language: Английский

Fluorinated Engineering toward Stable Lithium Metal Batteries

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 111106 - 111106

Published: May 1, 2025

Language: Английский