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Air Stabilization of Li7P3S11 Solid-State Electrolytes through Laser-Based Processing.

Yannick Eatmon1, Joseph W Stiles2, Shuichiro Hayashi3

  • 1Department of Chemical and Biological Engineering, Princeton Univeristy, Princeton, NJ 08544, USA.

Nanomaterials (Basel, Switzerland)
|August 12, 2023
PubMed
Summary
This summary is machine-generated.

Laser processing enhances the stability and ionic conductivity of lithium thiophosphate solid-state electrolytes, improving their suitability for safer, high-performance all-solid-state batteries.

Keywords:
energy deviceslaser-based processingsolid-state electrolyte

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Chemistry

Background:

  • All-solid-state batteries (ASSBs) offer enhanced safety and potential for higher energy density compared to conventional liquid electrolyte batteries.
  • Solid-state electrolytes (SSEs), particularly Li7P3S11, show promise due to high ionic conductivity but suffer from degradation via oxidation and hydrolysis.
  • Improving the stability of SSEs is crucial for the commercial viability of ASSBs.

Purpose of the Study:

  • To investigate a laser-based processing method for enhancing the humidity stability of Li7P3S11 SSEs.
  • To determine the effect of laser parameters on the surface morphology and chemical composition of the SSE.
  • To evaluate the impact of laser treatment on the ionic conductivity and degradation resistance of the SSE.

Main Methods:

  • Laser processing was applied to Li7P3S11 samples.
  • Surface morphology and chemical composition were analyzed.
  • Electrochemical impedance spectroscopy was used to measure ionic conductivity.
  • Degradation analysis was performed to assess stability.

Main Results:

  • Laser power and scanning speed significantly influenced surface morphology and chemical composition.
  • Laser-treated SSEs exhibited higher ionic conductivities than pristine samples after air exposure.
  • An optimal laser processing condition was identified that minimized P2S74- degradation.
  • Laser treatment improved the overall humidity stability of the SSE.

Conclusions:

  • Laser-based processing is an effective method for improving the stability and performance of Li7P3S11 SSEs.
  • This technique offers a pathway to overcome degradation issues and enhance the commercial potential of solid-state electrolytes for ASSBs.
  • Optimized laser treatment can lead to superior ionic conductivity and reduced degradation in humid environments.