| abstract |
The present invention (a) a first electrode comprising an electrode active material of the formulan n n A a M b (XY 4 ) c Z d n n n (Whereinn n n (i) A is selected from the group consisting of Li, Na, K, and mixtures thereof, where 0 <a ≦ 9;n n n (ii) M is one or more metals, including one or more metals that can be oxidized to a higher valence state, wherein 1 ≦ b ≦ 3;n n n (iii) XY 4 is selected from the group consisting of X'0 4-x Y ' x , X'0 4-y Y' 2y , X "S 4 and mixtures thereof, wherein X 'is P, As, Sb , Si, Ge, V, S and mixtures thereof; X ″ is selected from the group consisting of P, As, Sb, Si, Ge, V and mixtures thereof; Y 'is selected from the group consisting of halogen, S, N and mixtures thereof; 0 ≦ x <3; 0 <y ≤ 2; 0 <c ≦ 3;n n n (iv) Z is OH, halogen or a mixture thereof, where 0 ≦ d ≦ 6; M, XY 4 , Z, a, b, c, d, x and y are chosen to maintain the electrical neutrality of the compound);n n n (b) a second electrode that is counter-electrode with the first electrode, andn n n (c) an electrolyte comprising a cyclic ester and a mixture of carbonates selected from the group consisting of alkyl carbonates, alkylene carbonates and mixtures thereofn n n It relates to a lithium battery comprising a.n n n Preferably, M further comprises at least one non-transition metal. In a preferred embodiment, those having an olivine structure when c = 1 and those having a NASICON structure when c = 3. |