Tailored Anion-Enriched Solvation Sheath Design Enables Wide Temperature Range Performance of Lithium Metal Batteries
Changxing Han , Yunpeng Qu , Borui Li , Wenkai Song , Hui Lin , Dongming Liu , Mengfan Pei , Shuo Zhuo , Lin Wang , Xin Jin , Wanyuan Jiang , Chang Su , Xusheng Zhang , Xigao Jian , Fangyuan Hu
Chinese Journal of Chemistry ›› 2026, Vol. 44 ›› Issue (4) : 453 -461.
Conventional lithium-ion batteries that utilize high melting point ethylene carbonate (EC) solvent and graphite anodes exhibit a narrow operating temperature range, which is insufficient to meet the wide-temperature requirements of electric vehicle power batteries. Herein, a novel electrolyte featuring an anion-enriched solvation structure is developed by incorporating ethyl difluoroacetate (DFAE), a fluorinated solvent with wide liquid range and weak solvation capability, which enables the stable operation of lithium metal batteries (LMBs) over a broad temperature range (–50 °C to 60 °C). The anion-enrich solvation structure facilitates rapid desolvation and enables the formation of inorganic-dominated interphases on both the cathode and anode surfaces. NMC811||DEF||Li cells exhibit a high specific capacity of 194.7 mAh·g–1 at a 2 C rate and room temperature, retaining 77.16% capacity after 400 cycles. The pouch cell using DEF electrolyte successfully powered an LED panel at –50 °C, demonstrating practical viability. This innovative strategy provides a promising pathway for the development of next generation wide-temperature LMBs.
Anion-enriched solvation sheath / Wide temperature electrolyte / Lithium metal battery / Electrode electrolyte interphase / Electrolytes / Energy storage / Lithium dendrites / Lithium metal anodes
2025 SIOC, CAS, Shanghai, & WILEY-VCH GmbH
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