Procedure to optimize materials for cathodes and cathode material having enhanced electrochemical properties

摘要

A material C-A_xM(XO₄)_y that is of particles of a compound of the formula A_xM(XO₄)_y, wherein said particles include a carbon deposit deposited by means of pyrolysis on at least a portion of the surface thereof, and where: A is Li alone or partially replaced by at most 10 atomic % of Na or K; M is Fe(II), or Mn(II), or mixtures thereof alone or partially replaced by at most 30 atomic % of one or more metals selected from Mn, Ni and Co and/or at most 5% of Fe(III); XO₄ is PO₄ alone or partially replaced by at most 10 molar % of at least one group selected from SO₄, SiO₄ and MoO₄; and where said material has a calcium impurity content of lower than about 1000 ppm.