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Related Experiment Video

Updated: Aug 10, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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High-Voltage Cyclic Ether-Based Electrolytes for Low-Temperature Sodium-Ion Batteries.

Luming Yin1, Meilong Wang1, Can Xie1

  • 1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, People's Republic of China.

ACS Applied Materials & Interfaces
|February 13, 2023
PubMed
Summary

This study introduces a novel ether-based electrolyte for high-voltage sodium-ion batteries (SIBs) that enables stable operation at low temperatures. The electrolyte enhances the performance of the Na2/3Mn2/3Ni1/3O2 cathode from -40 to 25 °C.

Keywords:
cathode electrolyte interfaceether-based electrolytehigh-voltagelow temperaturesodium-ion batteries

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Cyclic ethers are promising low-temperature electrolyte solvents but have poor antioxidant properties.
  • Ether-based electrolytes are seldom used in high-voltage sodium-ion batteries (SIBs) for low-temperature applications.

Purpose of the Study:

  • To develop a novel ether-based electrolyte for high-voltage SIBs operating in a wide temperature range.
  • To improve the stability and cycle life of the Na2/3Mn2/3Ni1/3O2 cathode at low temperatures.

Main Methods:

  • A novel electrolyte based on tetrahydrofuran was designed for a high-voltage Na2/3Mn2/3Ni1/3O2 cathode.
  • The electrolyte facilitated the formation of a robust, inorganic component-rich cathode electrolyte interface layer.
  • Electrochemical performance was evaluated across a wide temperature range (-40 to 25 °C).

Main Results:

  • The Na2/3Mn2/3Ni1/3O2 cathode achieved 97.2% capacity retention after 140 cycles at room temperature (0.3 C).
  • At -40 °C, the cathode retained 89.3% of its room-temperature capacity and showed 94.1% retention after 100 cycles (0.2 C).
  • A stable cathode electrolyte interface layer was formed, enhancing cycle life.

Conclusions:

  • The developed ether-based electrolyte enables stable high-voltage SIB operation in a wide temperature range.
  • This work offers insights into designing ether-based electrolytes for stable, wide-temperature SIBs.
  • The tailored electrolyte significantly improves the low-temperature performance of the Na2/3Mn2/3Ni1/3O2 cathode.