Dudney and B.J. Neudecker. State-of-the-art cathode materials include lithium-metal oxides [such as LiCoO2, LiMn2O4, and Li(NixMnyCoz)O2], vanadium oxides, olivines (such as LiFePO4), and rechargeable lithium oxides. Layered oxides containing cobalt and nickel are the most studied materials for lithium-ion batteries.