Journal
JOURNAL OF POWER SOURCES
Volume 144, Issue 1, Pages 226-230Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2004.12.013
Keywords
cathode; Li-ion batteries; oxygen partial pressure; conductivity; capacity
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The discharge capacity of LiCoPO4, prepared using carbon-containing precursors, heated under different oxygen partial pressures (high-purity argon, air, pure oxygen) was investigated. LiCoPO4 heat-treated under high-purity argon showed a higher discharge capacity over the entire cycle life compared to under air or pure oxygen. No difference in the discharge capacity of LiCoPO4 heat-treated under air or pure oxygen was exhibited. The enhanced discharge capacity of LiCoPO4 heat-treated under argon compared to air/oxygen was a result of its higher electrical conductivity and smaller particle size. The higher electrical conductivity and smaller particle of LiCoPO4 heat-treated under argon is likely do the presence of cobalt phosphides and increased carbon content. Published by Elsevier B.V.
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