Authors
Fulu Chu, Lixian Wang, Xin Xue, Yu Xuan, Zehao An, Tong Yu, Wenshuo Hou, Longwei Liang, Linrui Hou, Changzhou Yuan
Published in
Chemical science. Jul 13, 2026. Epub Jul 13, 2026.
Abstract
High-voltage lithium metal batteries (LMBs) represent the most promising route to next-generation high-energy-density energy storage, yet their practical deployment is severely bottlenecked by conventional ethylene carbonate (EC)-based electrolytes, which suffer from a narrow electrochemical window below 4.3 V, unstable electrode-electrolyte interphases, uncontrolled Li dendrite growth, and a high Li+ desolvation barrier from strong EC-Li+ chelation. Herein, we propose an EC-free fluorination strategy to construct a series of carbonate electrolytes, with the optimized fully fluorinated solvent formulation of 3,3,3-trifluoropropylene carbonate (TFPC) and fluoroethyl methyl carbonate (FEMC) to precisely tailor the Li+ solvation into an F-solvent/anion-enriched structure. This design enables the formation of the robust LiF-rich dual interphases on both the Li anode and 4.6 V LiNi0.9Co0.05Mn0.05O2 (NCM90) cathode, delivering a 95% average coulombic efficiency over 150 cycles in Li‖Cu cells, and 82.3% (25 °C) and 82.6% (50 °C) capacity retention after 100 cycles at 1C in LMBs, along with outstanding rate and wide-temperature-tolerance properties. More essentially, this contribution offers a rational design paradigm in electrolyte chemistry for high-performance EC-free electrolytes toward next-generation high-energy-density LMBs.
PMID:
42529353
Bibliographic data and abstract were imported from PubMed on 30 Jul 2026.
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