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Related Concept Videos

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Weak Acid Solutions

Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
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Deep Eutectic Electrolytes for Lithium Metal Batteries: A Review.

Di-Chen Wu1,2, Xi-Long Wang2, Shi-Jie Yang2

  • 1School of Interdisciplinary Science, Beijing Institute of Technology, Zhuhai, 519088, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 21, 2025
PubMed
Summary

Deep eutectic electrolytes (DEEs) offer enhanced safety and performance for lithium metal batteries (LMBs). This review explores DEEs

Keywords:
deep eutectic electrolytesliquid electrolyteslithium metal batteriessolid‐state electrolytes

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Area of Science:

  • Electrochemistry and Materials Science
  • Energy Storage Technologies

Background:

  • Deep eutectic electrolytes (DEEs) are emerging as advanced materials for lithium metal batteries (LMBs).
  • DEEs offer high ionic conductivity, thermal stability, flame retardance, and a wide electrochemical stability window.
  • Current understanding of DEEs in LMBs requires further in-depth investigation.

Purpose of the Study:

  • To systematically review the formation, classification, properties, and applications of DEEs in both liquid and solid-state LMBs.
  • To highlight the advantages of DEEs in improving ionic conduction, interfacial stability, flame retardance, and overall battery safety.
  • To propose future research directions for overcoming limitations and advancing DEE applications in high-energy-density LMBs.

Main Methods:

  • Systematic literature review and analysis of DEEs in lithium metal batteries.
  • Examination of DEE formation mechanisms, fundamental properties, and classification.
  • Evaluation of DEE applications in liquid and solid-state battery systems.

Main Results:

  • DEEs demonstrate significant potential in addressing critical challenges in LMBs, including ionic conduction and interfacial stabilization.
  • The intrinsic flame retardance and thermal stability of DEEs contribute to enhanced battery safety.
  • DEEs show promise for both liquid and solid-state LMB applications, offering a viable alternative to conventional electrolytes.

Conclusions:

  • Deep eutectic electrolytes are a promising class of materials for next-generation lithium metal batteries.
  • Further research into DEEs is crucial for unlocking their full potential in high-safe and high-energy-density energy storage.
  • DEEs represent a key advancement in overcoming the limitations of conventional electrolytes for practical battery applications.