| 摘要 |
PROBLEM TO BE SOLVED: To obtain a solid active carbon capable of sufficiently taking out the electrostatic capacity predicted from the ratio of the active carbon to various organic resins, having a practically high electrostatic capacity and a high mechanical strength, excellent in durability and applicable to various kinds of uses, especially a solid active carbon suitable as an electrode material of various cells or batteries for auxiliary power supplies or a polarizing electrode of an electric double layer capacitor and to provide the electric double layer capacitor having a high capacity ratio of the electrostatic capacity at the time of low-current discharge to that of high-current discharge and excellent in durability. SOLUTION: This solid active carbon has 0.35-0.70 cc/g pore volume of pores having <=10 Å pore diameter and the pore volume of pores having 10-40 Å pore diameter accounting for 40-65% of the total pore volume in measurements of the pore distribution determined from an argon adsorption isotherm according to a Horvath- Kawazoe(HK) method. The electric double layer capacitor has >=40% capacity ratio of the electrostatic capacity at the time of low-cutrent discharge to that at the time of high-crrent density when measuring the electrostatic capacity by using the solid active carbon as a polarizing electrode and a nonaqueous electrolyte. |
