| 摘要 |
The present invention relates to a cathode composition for a lithium-ion battery having the formula
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒLi[M 4 y M 5 1-2y Mn y ]O 2
where 0.083 < y < 0.5 and
M 4 and M 5 are selected from the group consisting of Ni, Co, Fe, Cu, Li, Zn, V, and combinations thereof. In another embodiment, the invention relates to a cathode composition for a lithium-ion battery having the formula
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒLi[Li (1-2y )/ 3 M 2 y - Mn (2-y)/3 ]O 2
where 0.083 < y < 0.5 and
M 2 is selected from the group consisting of Ni, Co, Fe, Cu, Li, Zn, V, and combinations thereof. In yet another embodiment of the invention, a cathode composition for a lithium-ion battery is disclosed, which has the formula
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒLi[Li (1-y)/3 M 3 y M n(2-2y)/3 ]O 2
where 0.083 < y < 0.5 and
M 3 is selected from the group consisting of Ni, Co, Fe, Cu, Li, Zn, V, and combinations thereof. The above-mentioned compositions are in the form of a single phase having an 03 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 30°C and a final capacity of 130 mAh/g using a discharge current of 30 mA/g. |
