摘要 |
Lithium rich metal oxyfluorides are described with high specific capacity and, good cycling properties. The materials have particularly good high rate capabilities. The fluorine dopant can be introduced in a low temperature process to yield the materials with desirable cycling properties. In some embodiments, the positive electrode active materials have a composition represented approximately by the formula Li1+xNiaMnßCo?AdO2-zFz where: x is from about 0.02 to about 0.19, a is from about 0.1 to about 0.4, ß is from about 0.35 to about 0.869, ? is from about 0.01 to about 0.2, d is from 0.0 to about 0.1 and z is from about 0.01 to about 0.2, where A is Mg, Zn, A1, Ga, B, Zr, Ti, Ca, Ce, Y, Nb or combinations thereof. |
申请人 |
ENVIA SYSTEMS, INC.;KUMAR, SUJEET;LOPEZ, HERMAN;VENKATACHALAM, SUBRAMANIAN;KARTHIKEYAN, DEEPAK |
发明人 |
KUMAR, SUJEET;LOPEZ, HERMAN;VENKATACHALAM, SUBRAMANIAN;KARTHIKEYAN, DEEPAK |