Patent ID: 7529014

Claim:
A lithium insertion compound having the following formula (I): Li α M β M1 v M2 w M3 x M4 y M5 z B γ (XO 4−ε Z ε ) (I) M is an element in oxidation state +2, selected from the group consisting of V 2+ , Mn 2+ , Fe2+, Co 2+ and Ni 2+ ; M1 is an element in oxidation state +1, selected from the group consisting of Na + and K + ; M2 is an element in oxidation state +2, selected from the group consisting of Mg 2+ , Zn 2+ , Cu 2+ , Ti 2+ , and Ca 2+ ; M3 is an element in oxidation state +3, selected from the group consisting of Al 3+ , Ti 3+ , Cr 3+ , Fe 3+ , Mn 3+ , Ga 3+ , and V 3+ ; M4 is an element in oxidation state +4, selected from the group consisting of Ti 4+ , Ge 4+ , Sn 4+ , V 4+ , and Zr 4+ ; M5 is an element in oxidation state +5, selected from the group consisting of V 5+ , Nb 5+ , and Ta 5+ ; X is an element in oxidation state m, where m is an integer, from 2 to 6, exclusively occupying a tetrahedral site and coordinated by oxygen or a halogen, which is selected from the group consisting of B 3+ , Al 3+ , V 5+ , Si 4+ , P 5+ , S 6+ , Ge 4+ and mixtures thereof; Z is a halogen selected from the group consisting of F, Cl, Br and I; the coefficients α, β, v, w, x, y, z, γ and ε are all positive or equal 0 and satisfy the following equations: 0≦α≦2 (1); 1≦β≦2 (2); 0<γ (3); 0≦ε≦2 (4); α+2β+3γ+ v+ 2 w+ 3 x+ 4 y+ 5 z+m= 8−ε (5); and 0 < γ β + v + w + x + y + z ≤ 0.1 .