To provide a positive electrode member which is high in discharge capacity and used for a lithium battery superior in cycle characteristics, and the lithium battery using this positive electrode member.
The positive electrode member 10 is equipped with a positive electrode current collecting layer 1, a first active material layer 2a which is arranged on one face side of this positive electrode current collecting layer 1 and contains a first electrode active material in which a crystalline structure swells at the time of discharge, and a second active material layer 2b which is arranged on the other face side of the positive electrode current collecting layer and contains a second electrode active material in which the crystalline structure contracts at the time of discharge. If the lithium battery 20 is fabricated by using this positive electrode member 10, changes in the thickness of the positive electrode member 10 are suppressed at the time of charge and discharge of the battery. As the result, the lithium battery 20 in which the discharge capacity hardly decreases due to the changes in this thickness and which is superior in the cycle characteristics.
OTA YUKIHIRO
KAMIMURA TAKU
YOSHIDA KENTARO
OGAWA MITSUYASU
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