Electro-chemo-mechanical evolution of sulfide solid electrolyte/Li metal interfaces: operando analysis and ALD interlayer effects

Journal Article · Fri Mar 20 00:00:00 EDT 2020 · Journal of Materials Chemistry. A

DOI:https://doi.org/10.1039/c9ta11508k· OSTI ID:1659923

Davis, Andrew L.  ^[1]; Garcia-Mendez, Regina  ^[1]; Wood, Kevin N. ^[2]; Kazyak, Eric  ^[1]; Chen, Kuan-Hung ^[1]; Teeter, Glenn ^[3]; Sakamoto, Jeff ^[1]; Dasgupta, Neil P.  ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States)
2. National Renewable Energy Lab. (NREL), Golden, CO (United States); San Diego State Univ., CA (United States)
3. National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sulfide solid electrolytes (SE) show promise for high-performance solid-state batteries because of their high ionic conductivity and ease of processing. However, sulfide electrolytes have suffered from chemical and electrochemical instability against Li metal anodes. In this paper, we use a suite of in situ/operando microscopy and spectroscopy techniques to demonstrate that Al₂O₃ interlayers deposited using atomic layer deposition (ALD) delay degradation at the Li/LGPS interface by modifying the solid electrolyte interphase (SEI) chemistry and morphology. Optical and scanning electron microscopy are used to rationalize the electrochemical response of the system, which is attributed to a delayed onset of mechanical degradation at the interface when ALD interlayers are used. Operando X-ray photoelectron spectroscopy demonstrates that the dynamic evolution of SEI chemistry is impacted by the presence of the ALD interlayer. In situ Auger spectroscopy and operando optical microscopy provide visual evidence of spatial heterogeneity of Li plating, which is attributed to the chemo-mechanical degradation of the ALD interphase. The implications of these observations provide valuable insights toward the development of robust interlayers for solid-state batteries.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE National Renewable Energy Laboratory (NREL), Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)
• Grant/Contract Number: AC36-08GO28308; DGE 1256260
• OSTI ID: 1659923
• Alternate ID(s): OSTI ID: 1605610
• Report Number(s): NREL/JA-5K00-75158; MainId:6951; UUID:d4e01ca9-7feb-e911-9c29-ac162d87dfe5; MainAdminID:13648
• Journal Information: Journal of Materials Chemistry. A, Vol. 8, Issue 13; ISSN 2050-7488
• Publisher: Royal Society of Chemistry
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
operando XPS
solid electrolyte