| abstract |
A lithium-free mixed titanium and niobium oxide, including at least one trivalent metal M, and having a molar ratio Nb/Ti greater than 2, said oxide being selected from the group including the material of formula (I) and the material of formula (II): n M x Ti 1−2x Nb 2+x O 7±δ (I) where 0< x ≦0.20; −0.3≦δ≦0.3;n n M x Ti 2−2x Nb 10+x O 29±δ (II) where 0< x ≦0.40; −0.3≦δ≦0.3. |