| 摘要 |
Electrode active materials comprising lithium or other alkali metals, a transition metal, a phosphate or similar moiety, and a halogen or hydroxyl moiety. Such electrode actives include those of the formula:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ A a M b (XY 4 ) c Z d ,
wherein
(a) A is selected from the group consisting of Li, Na, K, and mixtures thereof, and 0<a‰¤8;
(b) M comprises one or more metals, comprising at least one metal which is capable of undergoing oxidation to a higher valence state, and 1 ‰¤ b ‰¤ 3;
(c) XY 4 is selected from the group consisting of X'O 4-x Y' x , X'O 4-y Y' 2y , and mixtures thereof, where X' is S; Y' is halogen; 0 ‰¤ x < 3; and 0 < y < 4; and 0 < c ‰¤ 3;
(d) Z is OH, halogen, or mixtures thereof, and 0 < d ‰¤ 6; and
wherein M, X, Y, Z, a, b, c, d, x and y are selected so as to maintain electroneutrality of said compound. In a preferred embodiment, M comprises two or more transition metals from Groups 4 to 11 of the Periodic Table. In another preferred embodiment, M comprises M'M", where M' is at least one transition metal from Groups 4 to 11 of the Periodic Table; and M" is at least one element from Groups 2, 3, 12, 13, or 14 of the Periodic Table. Preferred embodiments include those having where c = 1, those where c = 2, and those where c=3. Preferred embodiments include those where a < 1 and c = 1, those where a = 2 and c = 1, and those where a > 3 and c = 3. This invention also provides electrodes comprising an electrode active material of this invention, and batteries that comprise a first electrode having an electrode active material of this invention; a second electrode having a compatible active material; and an electrolyte. |
