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Li concentration change around Cu/LiPON interface measured by TOF-ERDA
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Description
Lithium metal is a promising anode material for the development of advanced all-solid-state batteries (ASSBs) with high energy density. Among the various solid electrolytes, lithium phosphorus oxynitride glass electrolyte (LiPON) is notable for facilitating stable Li plating-stripping reactions in ASSBs employing Li metal. The aim of this study is to examine the Li/LiPON interface, with a specific emphasis on the reductive decomposition of LiPON near this interface. We employed time-of-flight elastic recoil detection analysis (TOF-ERDA) to assess changes in Li concentration around the Cu/LiPON interface immediately prior to the Li plating reaction. Our electrochemical measurements indicate that critical decomposition of LiPON occurs when the voltage at the Cu electrode is reduced to 0.1 V vs. Li/Li⁺ at 25 °C, resulting in the in situ formation of Li₃P operating at 0.7 V vs. Li/Li⁺ as an anode material. The TOF-ERDA findings reveal that this decomposition reaction results in a layer with partial decomposition (ranging from 5 to 25% on average) extending up to approximately 30 nm from the Cu/LiPON interface. This insight is vital for enhancing the design and performance of ASSBs.
Journal
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- Journal of Solid State Electrochemistry
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Journal of Solid State Electrochemistry 28 4451-4456, 2024-12
Springer Science and Business Media LLC
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Details 詳細情報について
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- CRID
- 1050866882755942016
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- ISSN
- 14330768
- 14328488
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- HANDLE
- 2433/293109
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- Crossref
- KAKEN
- OpenAIRE