초록 ▼

A cathode composition for a lithium-ion battery having the formula Li[M1(1-x)Mnx]O2 where 0< x<1 and M1 represents one or more metal elements, with the proviso that M1 is a metal element other than chromium. The composition is in the form of a single phase having an O3 crystal structure that d

A cathode composition for a lithium-ion battery having the formula Li[M1(1-x)Mnx]O2 where 0< x<1 and M1 represents one or more metal elements, with the proviso that M1 is a metal element other than chromium. The composition is in the form of a single phase having an O3 crystal structure that does not undergo a phase transformation to a spinel crystal structure when incorporated in a lithium-ion battery and cycled for 100 full charge-discharge cycles at 30째 C. and a final capacity of 130 mAh/g using a discharge current of 30 mA/g.

대표청구항 ▼

What is claimed is: 1. A cathode composition for a lithium-ion battery in which the cathode composition has the formula Li[Li(1-2y)/3M2 yMn(2-y)/3]O2, where 0.083<y<0.5 and M2 represents one or more metal elements, with the proviso that M2 is a metal element other than chromium, said composit

What is claimed is: 1. A cathode composition for a lithium-ion battery in which the cathode composition has the formula Li[Li(1-2y)/3M2 yMn(2-y)/3]O2, where 0.083<y<0.5 and M2 represents one or more metal elements, with the proviso that M2 is a metal element other than chromium, said composition characterized as being in the form of a single phase having an O3 crystal structure that does not undergo a phase transformation to a spinel crystal structure when incorporated in a lithium-ion battery and cycled for 100 full charge-discharge cycles at 30째 C. and a final capacity of 130 mAh/g using a discharge current of 30 mA/g. 2. A cathode composition according to claim 1 wherein 0. 167<y<0.5. 3. A cathode composition according to claim 1 wherein M2 is selected from the group consisting of Ni, Co, Fe, Cu, Li, Zn, V, and combinations thereof. 4. A cathode composition according to claim 1 wherein M2 includes Ni. 5. A cathode composition according to claim 1 wherein M2 includes Co. 6. A cathode composition according to claim 1 wherein M2 includes the combination of Ni and Co. 7. A cathode composition for a lithium-ion battery in which the cathode composition has the formula Li[Li(1-y)/3M3 yMn(2-2y)/3]O2, where 0.083<y<0.5 and M3 represents one or more metal elements, with the proviso that M3 is a metal element other than chromium, and includes the combination of Ni and Co, said composition characterized as being in the form of a single phase having an O3 crystal structure that does not undergo a phase transformation to a spinel crystal structure when incorporated in a lithium-ion battery and cycled for 100 full charge-discharge cycles at 30째 C. and a final capacity of 130 mAh/g using a discharge current of 30 mA/g. 8. A cathode composition according to claim 7 wherein 0. 167<y<0.5. 9. A cathode composition according to claim 7 wherein M3 further includes an element selected from the group consisting of Fe, Cu, Li, Zn, V, and combinations thereof. 10. A cathode composition for a lithium-ion battery in which the cathode composition has the formula Li[M4yM 51-2yMny]O2, where 0.083<y<0.5 and: (a) M4 is Co and M5 includes the combination of Li and Ni or (b) M4 is Li and M5 includes the combination of Ni and Co, with the proviso that M4 and M5 do not include chromium, said composition characterized as being in the form of a single phase having an O3 crystal structure that does not undergo a phase transformation to a spinel crystal structure when incorporated in a lithium-ion battery and cycled for 100 full charge-discharge cycles at 30째 C. and a final capacity of 130 mAh/g using a discharge current of 30 mA/g. 11. A cathode composition according to claim 10 wherein 0. 167<y<0.5. 12. A cathode composition according to claim 10 wherein M 5 further includes an element selected from the group consisting of Fe, Cu, Li, Zn, V, and combinations thereof. 13. A cathode composition according to claim 10 wherein M 4 is Li and M5 includes the combination of Ni and Co. 14. A cathode composition according to claim 10 wherein M 4 is Co and M5 includes the combination of Li and Ni. 15. A cathode composition for a lithium-ion battery in which the cathode composition has the formula Li[NiyCo1-2y Mny]O2, where 0.083<y<0.5, said composition characterized as being in the form of a single phase having an O3 crystal structure that does not undergo a phase transformation to a spinel crystal structure when incorporated in a lithium-ion battery and cycled for 100 full charge-discharge cycles at 30째 C. and a final capacity of 130 mAh/g using a discharge current of 30 mA/g. 16. A cathode composition according to claim 15 wherein 0. 167<y<0.5. 17. A cathode composition for a lithium-ion battery in which the cathode composition has the formula Li[M1(1-x)Mn x]O2 where 0<x<1 and M1 represents one or more metal elements, with the proviso that (i) M1 is a metal element other than chromium, (ii) M1 includes the combination of Ni and Li, and (iii) the stoichiometry of the formula is selected such that (Li-1)/(Mn--Ni)=0.5, said composition characterized as being in the form of a single phase having an O3 crystal structure that does not undergo a phase transformation to a spinel crystal structure when incorporated in a lithium-ion battery and cycled for 100 full charge-discharge cycles at 30째 C. and a final capacity of 130 mAh/g using a discharge current of 30 mA/g. 18. A cathode composition according to claim 17 wherein M 1 further includes an element selected from the group consisting of Co, Fe, Cu, Zn, V, and combinations thereof. 19. A cathode composition according to claim 17 wherein M 1 further includes Co. 20. A cathode composition according to claim 17 wherein 0. 083<x<0.5. 21. A cathode composition according to claim 17 wherein 0. 167<x<0.5. 22. A lithium-ion battery comprising: (a) an anode; (b) a cathode comprising a composition according to claim 1, 7, 10, 15, or 16; and (c) an electrolyte separating said anode and said cathode.