Lithium storage cell presenting both a high electrical potential and a high lithium insertion capacity

摘要

A lithium storage cell comprises at least a first electrode comprising an active material wherein Li⁺ cations can be inserted, a second electrode and an electrolyte. The active material of the first electrode comprises a linear condensed compound comprising at least two tetrahedra, respectively of AO₄ and A'O₄ type, bonded by a common oxygen atom. A transition metal ion M²⁺ with a degree of oxidation of +2 selected from the group consisting of Ni²⁺, Co²⁺, Mn²⁺, Fe²⁺ and Ti²⁺ is inserted in the linear condensed compound, and the ratio between the number of Li⁺ cations able to be inserted in the active material and the number of transition metal ions M²⁺ is strictly greater than 1. A and A' are selected from the group consisting of P⁵⁺, Si⁴⁺, Al³⁺, S⁶⁺, Ge⁴⁺, B³⁺.