PROCEDURE TO OPTIMIZE MATERIALS FOR CATHODES AND CATHODE MATERIAL HAVING ENHANCED ELECTROCHEMICAL PROPERTIES

摘要

The present invention relates to a material CA _x M (XO ₄ ) _y consisting of particles of a compound of the formula A _x M (XO ₄ ) _y , wherein the particles comprise a carbon deposit deposited by pyrolysis on at least a part of its surface , A represents Li alone or Li substituted by 10 atomic% or less of Na or K; M is at least one element selected from the group consisting of Fe (II) or Mn (II) or a mixture thereof, or at most 30 atomic% Mn, Ni and Co, and / (II) or Mn (II), or a mixture thereof, partially replaced by at least one of the elements; XO ₄ is PO ₄ alone or in less than 10 atom% SO _4, SiO ₄ and MoO represents the PO ₄ substituted by at least one group selected from a _4-part; The material has less than about 1000 ppm of calcium present as impurities.