Double-shell core lithium nickel manganese cobalt oxides
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United States of America Patent
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Apr 4, 2017
Grant Date -
Oct 25, 2012
app pub date -
Oct 19, 2010
filing date -
Nov 5, 2009
priority date (Note) -
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Abstract
A lithium transition metal oxide powder for use in a rechargeable battery is disclosed, where the surface of the primary particles of said powder is coated with a first inner and a second outer layer, the second outer layer comprising a fluorine-containing polymer, and the first inner layer consisting of a reaction product of the fluorine-containing polymer and the primary particle surface. An example of this reaction product is LiF, where the lithium originates from the primary particles surface. Also as an example, the fluorine-containing polymer is either one of PVDF, PVDF-HFP or PTFE.
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