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Updated: Jan 11, 2026

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Charging Voltage-Dependent Interphase Stabilization Enabling Wide-Temperature High-Voltage Li/LiCoO2 Battery.

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Summary
This summary is machine-generated.

Researchers developed a new electrolyte strategy for lithium metal batteries (LMBs) that stabilizes interfaces under high voltage and extreme temperatures. This breakthrough enhances battery performance and longevity in demanding conditions.

Keywords:
dendriteselectrode electrolyte interphasehigh temperaturehigh voltagelithium metal batterieslow temperature

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Designing stable electrolytes for high-voltage lithium metal batteries (LMBs) is challenging due to extreme temperature and voltage requirements.
  • Existing strategies often focus on solvation structure, limiting performance in harsh conditions.

Purpose of the Study:

  • To present a charging voltage-driven interfacial stabilization strategy for robust interphase construction in LMBs.
  • To improve the performance and durability of LMBs under high voltage and wide temperature ranges.

Main Methods:

  • Constructed a robust interphase using a thin organic layer over a LiF/borate-rich matrix.
  • Utilized a charging voltage-driven approach to passivate lithium metal and cathode surfaces.
  • Tested Li/LiCoO2 cells under various conditions: high voltage, elevated temperature (60 °C), room temperature, and extreme cold (-40 °C).

Main Results:

  • Achieved 88% capacity retention over 900 cycles at 4.5 V (0.5 C).
  • Maintained 83% capacity after 300 cycles at 60 °C (3 C, 3-4.6 V).
  • Demonstrated 72% capacity retention after 200 cycles at room temperature (1 C, 3-4.7 V) and 92% at -40 °C (4.6 V).

Conclusions:

  • The developed strategy effectively passivates interfaces, enhancing LMB stability and cycle life.
  • Tuning charging voltage for interphase engineering offers a promising alternative to solely regulating solvation structure.
  • This approach advances the development of high-voltage LMBs for extreme environmental conditions.