Differences in the Interfacial Mechanical Properties of Thiophosphate and Argyrodite Solid Electrolytes and Their Composites

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10 Scopus citations

Abstract

Interfacial mechanics are a significant contributor to the performance and degradation of solid-state batteries. Spatially resolved measurements of interfacial properties are extremely important to effectively model and understand the electrochemical behavior. Herein, we report the interfacial properties of thiophosphate (Li3PS4)-and argyrodite (Li6PS5Cl)-Type solid electrolytes. Using atomic force microscopy, we showcase the differences in the surface morphology as well as adhesion of these materials. We also investigate solvent-less processing of hybrid electrolytes using UV-Assisted curing. Physical, chemical, and structural characterizations of the materials highlight the differences in the surface morphology, chemical makeup, and distribution of the inorganic phases between the argyrodite and thiophosphate solid electrolytes.

Original languageEnglish
Pages (from-to)44292-44302
Number of pages11
JournalACS Applied Materials and Interfaces
Volume14
Issue number39
DOIs
StatePublished - Oct 5 2022

Funding

This research at Oak Ridge National Laboratory, managed by UT Battelle, LLC, for the US Department of Energy (DOE) under contract DE-AC05-00OR22725, was sponsored by the Laboratory-Directed Research and Development (LDRD) Program at Oak Ridge National Laboratory and the Office of Energy Efficiency and Renewable Energy (EERE) Vehicle Technologies Office (VTO) (Deputy Director: David Howell) Applied Battery Research subprogram (Program Manager: Peter Faguy). M.B.D. was also supported by an Alvin M. Weinberg Fellowship at the Oak Ridge National Laboratory. Atomic force microscopy was conducted as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a US Department of Energy, Office of Science User Facility at the Oak Ridge National Laboratory.

Keywords

  • AFM
  • Argyrodite
  • Interface
  • Mechanical properties
  • Solid electrolyte
  • Thiophosphate

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