NICKELRICH AND MANGANESERICH QUATERNARY METAL OXIDE MATERIALS AS CATHODES FOR LITHIUMION AND LITHIUMION POLYMER BATTERIES.

摘要

Positive electrodeactive materials for use in lithiumion and lithiumion polymer batteries contain quaternary composite oxides of manganese, nickel, cobalt and aluminum where one of the four is present at levels of over 70 mol percent. For example, LixMn0,2 Ni0,7 Co0,05 On and LixMn0,7 Ni0,2 Co0,05 Al0,05 On. The composite oxides can be lithiated to form positive electrodeactive materials that are stable over at least ten chargedischarge cycles at voltage levels over 4.8 volts, and have capacities of over 200 mAhg. Methods for producing the materials and electrochemical cells and batteries that include the materials are also provided.