Abstract
Structural changes in Li/LIPON/LiCoO 2 thin-film lithium batteries during initial cycling were investigated. Scanning electron microscopic and Raman spectroscopic analyses indicated that initial cycling resulted in aligned nanorods of LiCoO 2 and improved interfacial connection of LiCoO 2 -LIPON and LiCoO 2 -Pt current collector but local structural disordering and an increased fraction of (003)-oriented grains in originally (101)/(104)-oriented LiCoO 2 film. The structural changes are attributed to irreversible initial capacity loss of 33%. The data contribute to a basic understanding of the structural factors that can affect cell resistance and cycling behavior in the operation of solid-state electrochemical systems.
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