POSITIVE ELECTRODE ACTIVE MATERIAL AND PROCESS FOR PRODUCING THE SAME, AND BATTERY

摘要

This invention provides a positive electrode active material, which can provide a high capacitance and, at the same time, can improve stability or low-temperature properties, and process for producing the same and a battery. A positive electrode (21) comprises a positive electrode active material that comprises a lithium composite oxide comprising Li and at least one element of Co, Ni and Mn and contains in its surface part P and at least one element of Ni, Co, Mn, Fe, Al, Mg and Zn as a covering element. Preferably, the content of the covering element is higher in the surface than in the inside and is reduced from the surface toward the inside.