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This content will become publicly available on June 19, 2019

Title: Electrochemical and interfacial behavior of all solid state batteries using Li 10SnP 2S 12 solid electrolyte

Thio-Lithium Superionic Conductor (Thio-LISICON) Li 10GeP 2S 12 equivalent Li 10SnP 2S 12 (LSPS) is comparable in ionic conductivity yet with a lower cost as an electrolyte for all solid-state batteries (ASSBs). In this study, ASSBs with LSPS solid electrolyte (SE), lithium-indium alloy anode, and LiCoO 2 (LCO) cathode were successfully fabricated and their electrochemical performance at 60 °C was examined. Atomic layer deposition of Li 3NbO 4 on LCO was conducted to improve the interfacial stability. The Li 3NbO 4 coating effectively improves the cycle stability of the ASSB. Electrochemical impedance spectroscopy tests indicate a rapid growth of charge transfer resistance upon cycling for the cell with the uncoated LCO, primarily due to the surface instability and build-up of a space charge layer. However, the ASSBs with Li 3NbO 4 coated LCO show a more stable interface with a negligible impedance increase upon cycling, attributable to the buffering and passivating roles of the Li 3NbO 4 coating. Lastly, the interfacial microstructure was analyzed to elucidate at the underlying reasons for the impedance increase and the pivotal role of the Li 3NbO 4 coating.
Authors:
 [1] ;  [1] ;  [2] ; ORCiD logo [3] ;  [1] ;  [2] ;  [1]
  1. Univ. of Washington, Seattle, WA (United States). Materials Science and Engineering Department
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
  3. General Motors R&D Center, Warren, MI (United States). Chemical Sciences and Materials Systems Lab
Publication Date:
Report Number(s):
PNNL-SA-132845
Journal ID: ISSN 0378-7753; PII: S0378775318306347
Grant/Contract Number:
AC05-76RL01830; EE0007787; AC02-05CH11231; 18769; 6951379
Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Name: Journal of Power Sources; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; Li10SnP2S12; All-solid-state battery; Solid electrolyte; Atomic layer deposition; Interfacial stability
OSTI Identifier:
1457752