| abstract |
An object of the present invention is to improve energy density and output density while ensuring durability.n n n The negative electrode 15 includes a negative electrode current collector 16 in which a through hole 16a is formed, and a negative electrode mixture layer 17 applied to the negative electrode current collector. In addition, the anodes 13 and 14 are disposed to sandwich the cathode 15, one anode 13 is formed with a thin anode mixture layer 20 having high output characteristics, and the other anode 14 has a high capacity characteristic. A thick positive electrode mixture layer 22 is formed. In this way, by combining the anodes 13 and 14 with different charge / discharge characteristics, the energy density and the output density of the power storage device 10 can be improved. In addition, since the ions can be moved through the through holes 16a between the positive electrode mixture layers 22 and 20, variations in the anode potential generated between the anodes 13 and 14 can be eliminated, and the electrical storage device 10 It becomes possible to expand the durability. |