| abstract |
Provided is a secondary battery positive electrode which is less likely to experience a change in crystal structure due to charging and discharging, and thus has excellent cycle characteristics. This secondary battery positive electrode comprises n positive electrode active material layers (n is an integer of at least two), n-1 separation layers, and a positive electrode current collector layer, wherein the positive electrode active material layers and the separation layers are alternately laminated, the positive electrode active material layer has lithium, cobalt, and oxygen, and the separation layer has a titanium compound. As the titanium compound, titanium oxide and titanium nitride are preferable, and, the titanium oxide is particularly preferable. |