Cathode Interface Compatibility of Amorphous LiMn2O4 (LMO) and Li7La3Zr2O12 (LLZO) Characterized with Thin-Film Solid-State Electrochemical Cells

Alexander A. Delluva, Alexander A. Delluva, Jessica Dudoff, Jessica Dudoff, Glenn Teeter, Adam Holewinski, Adam Holewinski, Adam Holewinski

Research output: Contribution to journalArticlepeer-review

24 Scopus Citations

Abstract

Solid-state lithium-ion batteries are a hopeful successor to traditional Li-ion cells that use liquid electrolytes. While a growing body of work has characterized the interfaces between various solid electrolytes and the lithium metal, interfaces with common cathode intercalation compounds are comparatively less understood. In this contribution, the influence of polarization and temperature on interfacial stability between LiMn2O4 (LMO) and Li7La3Zr2O12 (LLZO) are investigated. Sputtered thin-film LMO electrodes are utilized to permit high-capacity cycling while retaining a large ratio of interfacial area to electrode bulk. Electrochemical impedance spectroscopy (EIS) is compared across a set of full (LMO|LLZO|Li) and symmetric (LMO|LLZO|LMO, Li|LLZO|Li, and Au|LLZO|Au) cells to delineate impedance features that are specific to the evolution of the cathode interface. Additional X-ray photoelectron spectroscopy (XPS) provides evidence of a limited interfacial reaction between LMO and LLZO that coincides with an increase in the impedance of the LMO-LLZO interface.

Original languageAmerican English
Pages (from-to)24992-24999
Number of pages8
JournalACS Applied Materials and Interfaces
Volume12
Issue number22
DOIs
StatePublished - 3 Jun 2020

Bibliographical note

Publisher Copyright:
© 2020 American Chemical Society.

NREL Publication Number

  • NREL/JA-5K00-76250

Keywords

  • cathodic interface
  • garnet electrolyte
  • impedance spectroscopy
  • lithium-ion battery
  • manganese spinel
  • solid interface
  • solid-state electrolyte

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