Lithium iron phosphate cathode materials with enhanced energy density and power performance
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United States of America Patent
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Jun 18, 2009
app pub date -
Dec 14, 2007
filing date -
Dec 14, 2007
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Abstract
wherein M is at least Fe or Mn.Said material is prepared by method comprising the steps of providing starting micron sized particles and starting submicron sized particles of at least one lithium metal phosphate or of precursors of a lithium metal phosphate; mixing by mechanical means said starting particles; making a pyrolytic carbon deposit on the lithium metal phosphate starting particles before or after the mixing step, and on their metal precursor before or after mixing the particles; optionally adding carbon black, graphite powder or fibers to the said lithium metal phosphate particles before the mechanical mixing.
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