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Article
Nancy Dudney
Oak Ridge National Laboratory
Corresponding Author
Miaofang Chi
Oak Ridge National Laboratory
Corresponding Author
ORCiD: https://orcid.org/0000-0003-0764-1567
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Li phosphorus oxynitride (LiPON) is one of a very few solid electrolytes that have demonstrated stability against Li metal, and performed extended cycling with high coulombic efficiency. However, theoretical calculations show that LiPON does react with Li metal. Here, we utilize in situ electron microscopy to directly observe the dynamic evolutions at the LiPON-Li interface upon contacting and under biasing at the nanometer scale. We reveal that a thin interface layer (~60nm) develops at the LiPON-Li interface upon contact. This interface layer is conductive and robust, serving as an effective passivation layer keeping the interface stable over time and under biasing up to 5 V. Our results explicate the excellent cyclability of LiPON and reconciles the existing debates regarding the stability of LiPON-Li interface. This work demonstrates that glassy solid-state electrolytes with a sufficient ionic conductivity, though may not have a perfect initial electrochemical window with Li metal, may excel in future applications for ASSBs.
Keywords
Li phosphorus oxynitride, electron microscopy, LiPON-Li interface, glassy solid-state electrolytes
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There is NO Competing Interest.
This is a list of supplementary files associated with this preprint. Click to download.
- SupportingInformationLiPON.docx
Elucidating Interfacial Stability between Lithium Metal Anode and LiPON via In Situ Electron Microscopy
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This is a preprint. It has not completed peer review.
Article
Nancy Dudney
Oak Ridge National Laboratory
Corresponding Author
Miaofang Chi
Oak Ridge National Laboratory
Corresponding Author
ORCiD: https://orcid.org/0000-0003-0764-1567
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 17 Jul, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Li phosphorus oxynitride (LiPON) is one of a very few solid electrolytes that have demonstrated stability against Li metal, and performed extended cycling with high coulombic efficiency. However, theoretical calculations show that LiPON does react with Li metal. Here, we utilize in situ electron microscopy to directly observe the dynamic evolutions at the LiPON-Li interface upon contacting and under biasing at the nanometer scale. We reveal that a thin interface layer (~60nm) develops at the LiPON-Li interface upon contact. This interface layer is conductive and robust, serving as an effective passivation layer keeping the interface stable over time and under biasing up to 5 V. Our results explicate the excellent cyclability of LiPON and reconciles the existing debates regarding the stability of LiPON-Li interface. This work demonstrates that glassy solid-state electrolytes with a sufficient ionic conductivity, though may not have a perfect initial electrochemical window with Li metal, may excel in future applications for ASSBs.
Figure 1
Figure 2
Figure 3
Figure 4
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