| 摘要 |
A lithium secondary cell, in which a water-soluble polymer having a superior resistance to organic solvents is used as a binder, is disclosed. The cell comprises a positive electrode and an electrolytic solution, wherein the positive electrode includes a positive electrode active material having a LiNiO2 compound expressed as LixNi1-yMyO2 (M is at least one element selected from a group including Co, Mn, Al, B, Ti, Mg and Fe, 0<x<=1.2, 0<y<=0.25) with a specific crystallimity and a binder for binding the positive electrode active material. The BET specific surface area of the LiNiO2 compound is not more than 0.65 m<2>/g. The binder has a water-soluble polymer not swollen with the electrolytic solution. The surface of the positive electrode active material is covered by the water-soluble polymer. |
