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

摘要

A material C-AxM(XO4)y that is of particles of a compound of the formula AxM(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.

主权项

1. A material C-AxM(XO4)y consisting of particles of a compound with the formula AxM(XO4)y, where the particles comprise a carbon deposit deposited by pyrolysis on at least part of its surface, wherein:
A stands for Li, alone or partially replaced by at most 10% atomic percentage of Na or K; M stands for Fe(II) or Mn(II), or mixtures thereof, alone or partially replaced by at most 30% atomic percentage of the atoms of one or more other metals chosen from Ni and Co, and/or by at most 10% atomic percentage of one or more aliovalent or isovalent metals other than Ni or Co, and/or by at most 5% atomic percentage of Fe(III); and XO4 stands for PO4 alone or partially replaced by at most 10% atomic percentage of at least one group chosen from among SO4, SiO4, and MoO4; and 0