Operando X-Ray Tomography Imaging of Solid-State Electrolyte Response to Li Evolution under Realistic Operating Conditions

Natalie Seitzman, Olivia Bird, Rory Andrykowski, Steven Robbins, Mowafak Al-Jassim, Svitlana Pylypenko

Research output: Contribution to journalArticlepeer-review

11 Scopus Citations

Abstract

Solid-state Li-ion conductors are a next-generation battery technology that are particularly promising for electric vehicles, offering the capacitive benefits of Li metal anodes with nonflammable electrolytes. Microstructural evolution in these solid-state batteries, especially the Li anode, requires deeper understanding of the conditions under which certain undesired behaviors are more likely to occur. This study utilizes operando X-ray computed tomography to visualize the behavior of lithium in response to device operation, considering variables that are relevant to a realistic battery: stack pressure, microscale defects such as pores, and temperature. This work demonstrates that experimental and operational conditions, especially temperature, affect the fundamental driving forces of realistic solid electrolyte systems and provides visual insight into possible mechanisms of Li migration. In particular, the effect of these variables on Li propagation from the anode through pre-existing defects and Li nucleation within the imperfectly electron-insulating electrolyte is highlighted.

Original languageAmerican English
Pages (from-to)1346-1355
Number of pages10
JournalACS Applied Energy Materials
Volume4
Issue number2
DOIs
StatePublished - 22 Feb 2021

Bibliographical note

Publisher Copyright:
© 2021 American Chemical Society.

NREL Publication Number

  • NREL/JA-5K00-78172

Keywords

  • battery
  • Li anode
  • Li ion
  • lithium anode
  • lithium ion
  • operando X-ray computed tomography
  • solid state conductor

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