Long Cycle Life Elevated Temperature Thin-Film Batteries Incorporating MoO3 Cathodes

MoO3 thin films were examined as cathodes for elevated temperature Li thin-film batteries. All solid-state cells incorporating MoO3 cathodes were found to have superior cycle life and specific capacity compared with state-of-art LiCoO2-based Li thin-film cells. At 150DGC, the MoO3 cells could be cyc...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2005-01, Vol.152 (5), p.A966-A969
Main Authors: West, W C, Whitacre, J F
Format: Article
Language:English
Online Access:Get full text
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Summary:MoO3 thin films were examined as cathodes for elevated temperature Li thin-film batteries. All solid-state cells incorporating MoO3 cathodes were found to have superior cycle life and specific capacity compared with state-of-art LiCoO2-based Li thin-film cells. At 150DGC, the MoO3 cells could be cycled at deep charge and discharge voltages from 3.5 to 1 V over thousands of cycles with no apparent long-term capacity fade, in contrast to LiCoO2 cells which experienced severe capacity fade over a few hundred cycles at this temperature. The practical specific capacity of the MoO3 cathodes, approximately 298 mAh/g, was about twice that of state-of-art LiCoO2 cells cycled from 4.2 to 2.5 V.
ISSN:0013-4651
DOI:10.1149/1.1887147