| 摘要 |
PROBLEM TO BE SOLVED: To reduce the internal resistance and prevent the occurrence of a short circuit accident by making the peripheral part of a metal sheet into a sheet continued body, and making the inside part surrounded by the sheet continued body into a porous area having a porosity of a specified value. SOLUTION: The peripheral part of the metal sheet 2 of a sheet type electrochemical element current collector 1 is left without perforating as a frame-like sheet continued body 3, and the inside part surrounded by the sheet continued body 3 is perforated to form a porous area 4. In the porous area 4, a number of through-holes 5 extending through the square or circular metal sheet 2 shown by P, Q are provided with a porosity of 40-90%. When the length of one edge of the metal sheet 2 is L, and the width of the sheet continued body 3 is W, the relation between W and L is set to 0.01<=W/L<=0.3. In a battery and a capacitor using this element current collector 1, the internal resistance and the short circuit accident ratio can be reduced to improve the reliability. |
