Protective coatings for negative electrodes
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United States of America Patent
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-
Feb 15, 2000
Issued Date -
N/A
app pub date -
May 29, 1998
filing date -
Nov 23, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is an alkali metal negative electrode having a protective layer. Specifically, the disclosed negative electrode includes a glassy or amorphous surface protective layer which conducts alkali metal ions but effectively blocks the alkali metal in the electrode from direct contact with the ambient. The protective layer has improved smoothness and reduced internal stress in comparison to prior protective layers such as those formed by sputtering. In a specific embodiment, the protective layer is formed on the lithium metal electrode surface by a plasma assisted deposition technique.
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