Patent ID: 8486309

Claim:
An active material for a lithium battery electrode, comprising a phase having a general formula Li 2+v−4c C c Ti 3−w Fe x M y M′ z O 7−α , in which M and M′ are metal ions of groups of 2 to 15 having an ionic radius between 0.5 and 0.8 Å in an octahedral oxygen environment, v, w, x, y, z and a being associated by the relationships: 2α=−v+4w−3x−ny−n′z, with n and n′ being the respective formal degrees of oxidation of M and M′; −0.5 ≦v≦+ 0.5; − y+z> 0; x+y+z=w ; and 0< w≦ 0.3; wherein at least part of the lithium is substituted by carbon according to the relationship 0<c≦(2+v)/4.