| 摘要 |
The invention provides a secondary battery. An electrolyte of the secondary battery easily seeps into electrodes. The secondary battery comprises an electrode part (12) formed by laminating a positive electrode and a negative electrode separated with the positive electrode by a spacer (51), and the electrolyte. Two surfaces of a positive electrode current collector (41) of the positive electrode are provided with positive electrode layers containing positive electrode active materials, and two surfaces of a negative electrode current collector (31) of the negative electrode are provided with negative electrode layers containing negative electrode active materials, a groove part (45) is arranged on the positive electrode layer, and a through hole (35) is arranged on the negative electrode current collector. |
