Journal
SOLID STATE IONICS
Volume 177, Issue 26-32, Pages 2635-2638Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2006.04.049
Keywords
lithium-ion; vanadium; fluorophosphate; cathode; safety
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In this paper, we report the latest findings for the new lithium vanadium fluorophosphate cathode material, LiVPO4F. High quality samples have been prepared using a carbothermal reduction approach and extensive electrochemical and DSC measurements have been performed. In graphite based lithium-ion cells, the LiVPO4F demonstrates reversible specific capacity behavior approaching theoretical. The lithium-ion system operates with an average discharge voltage around 4 V, low polarization and with good rate capability. These results indicate that the active material possesses exemplary electrochemical performance and may well be suitable as a replacement for LiCoO2 in commercial lithium-ion cells. DSC measurements on charged cathodes indicate the thermal stability behavior expected for a phosphate based active material. (c) 2006 Elsevier B.V All rights reserved.
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