POWER STORAGE DEVICE AND ELECTRONIC DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a power storage device hard to cause the worsening of cycle characteristics or the drop in capacity even if it is used in a state of being curved.SOLUTION: Provided is a power storage device comprising: a positive electrode; a negative electrode; an electrolyte; and an outer sheath. The positive electrode has: a positive electrode current collector; and a positive electrode active material layer in contact with the positive electrode current collector. The negative electrode has: a negative electrode current collector; and a negative electrode active material layer in contact with the negative electrode current collector. The positive electrode active material layer and the negative electrode active material layer are placed over each other. The power storage device has the positive electrode, the negative electrode and the electrolyte in a position surrounded by the outer sheath. Supposing that the length of the positive electrode active material layer is Pand its width is P, and the length of the negative electrode active material layer is Nand its width is N, the following conditions are satisfied: P>P; N>N; and N>P+N-P.SELECTED DRAWING: Figure 1