A Novel Approach for Post-Mortem Analysis in All-Solid-State Batteries: Isolating Solid Polymer Electrolytes from Lithium Anodes

Ortal Breuer, Ido Rozen, Nicole Leifer, Gayathri Peta, Miryam Fayena-Greenstein, Doron Aurbach, Gil Goobes

Research output: Contribution to journalArticlepeer-review


Polymeric electrolytes are currently at the forefront of research for the next generation of lithium all-solid-state batteries. Polyethylene oxide (PEO), a commonly used polymer for these batteries, operates at elevated temperatures at which it reacts with active metal electrodes (e.g., lithium). Rich surface chemistry is developed at the Li-PEO interfaces, thereby controlling these batteries’ electrochemical behavior. Interfacial studies are essential to comprehend batteries’ stabilization or capacity fading mechanisms. For that, post-mortem analysis with an emphasis on interfaces is a necessary approach to underpinning these mechanisms. While it can be readily done with liquid electrolytes, post-mortem characterization of similar interfaces with solid electrolytes is hampered by the Li-PEO stack firm adhesion, which is impossible to separate. Here, various methods were attempted to separate polymer electrolytes from metallic anodes after Li symmetric cells’ operation, which is a necessary step for solid-state NMR characterization. By a simple method involving exposure to N2(g) atmosphere, PEO-based solid electrolyte samples were successfully isolated from lithium anodes while preserving their morphology and chemical characteristics to enable their direct analysis. This method’s concept was approved by Solid-state NMR spectroscopy. This work opens the door for post-operative analysis of many kinds of solid-state Li batteries.

Original languageEnglish
Article number020532
JournalJournal of the Electrochemical Society
Issue number2
StatePublished - 1 Feb 2024


  • PEO
  • SS NMR spectroscopy
  • all-solid-state lithium batteries
  • polymer electrolytes
  • post-mortem analysis

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Renewable Energy, Sustainability and the Environment


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