A positive electrode plate, a negative electrode plate, and a battery were prepared and evaluated for the various properties as in Example 1 except that 1) the thickness of the LCO green sheet was reduced so that the thickness of the positive electrode plate was 60 μm, and 2) the thickness of the LTO green sheet was reduced so that the thickness of the negative electrode layer was 70 μm.

A positive electrode plate, a negative electrode plate, and a battery were prepared and evaluated for the various properties as in Example 1 except that 1) the thickness of the LCO green sheet was increased so that the thickness of the positive electrode plate was 330 μm, and 2) the thickness of the LTO green sheet was increased so that the thickness of the negative electrode layer was 400 μm.

A positive electrode plate, a negative electrode plate, and a battery were prepared and evaluated for the various properties as in Example 1 except that powder C composed of LCO plate particles produced as shown in Table 1 was used instead of powder A.

A positive electrode plate, a negative electrode plate, and a battery were prepared and evaluated for the various properties as in Example 1 except that 1) the thickness of the LCO green sheet was reduced so that the thickness of the positive electrode plate was 205 μm, 2) a Li₂CO₃ green sheet piece produced by the following procedures was placed on the LCO green sheet as an excess-lithium source before placing the top setter, and 3) the LCO green sheet was fired in two-stage process at 800° C. for 5 hours and then at 840° C. for 20 hours.

(Preparation of Li₂CO₃ Green Sheet (Excess-Lithium Source))