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Updated: May 20, 2026

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A stabilized PEO-based solid electrolyte via a facile interfacial engineering method for a high voltage solid-state

Jiliang Qiu1, Lufeng Yang2, Guochen Sun1

  • 1Beijing Advanced Innovation Center for Materials Genome Engineering, Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. hli@iphy.ac.cn xyu@iphy.ac.cn lqchen@iphy.ac.cn and School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China.

Chemical Communications (Cambridge, England)
|April 18, 2020
PubMed
Summary
This summary is machine-generated.

A new interfacial engineering method stabilizes solid electrolytes in high-voltage lithium metal batteries. This approach enhances battery performance and longevity, crucial for advanced energy storage solutions.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Solid-state lithium metal batteries offer enhanced safety over liquid electrolyte counterparts.
  • Polyethylene oxide (PEO)-based electrolytes are promising but face challenges with interfacial stability, especially at high voltages.
  • Degradation at the electrode-electrolyte interface limits the cycle life and performance of solid-state batteries.

Purpose of the Study:

  • To develop a facile in situ method for interfacial engineering.
  • To stabilize the interface between a PEO-based solid electrolyte and a high-voltage cathode.
  • To improve the cycling performance and capacity retention of solid-state lithium metal batteries.

Main Methods:

  • In situ electro-deposition was employed for interfacial modification.
  • A PEO-based solid electrolyte (PEO-LiTFSI) was used.
  • The battery configuration was Li/PEO-LiTFSI/LiNi0.5Co0.2Mn0.3O2, operating at high voltages (3.0-4.2 V).

Main Results:

  • The interfacial engineering method effectively stabilized the PEO-based solid electrolyte.
  • The modified batteries demonstrated superior capacity retention of 72.3% after 200 cycles.
  • Critical factors influencing the interfacial engineering were identified and demonstrated.

Conclusions:

  • The in situ electro-deposition technique provides an effective strategy for stabilizing solid-state battery interfaces.
  • This method significantly enhances the electrochemical performance and cycle life of high-voltage lithium metal batteries.
  • The findings pave the way for developing more robust and reliable solid-state battery technologies.