| 摘要 |
PURPOSE: To provide a secondary battery with large capacity by making a positive electrode, at least the part of which is coated with an electrolytic oxide film, have a specified value of a bulk density of higher. CONSTITUTION: About 0.01-5.0mol/liter concentration of a substance (e.g. acrylonitrile, phenol, aniline, pyrrole, etc.) which can form an electrolytic oxide film is added to an electrolytic liquid and after the assembly of a battery, the battery is charged and discharged one time. As a result, the initial capacity loss of the negative electrode is solved and a secondary battery with high energy can be obtained. The weight ratio of the electrolytic oxide film in the positive electrode is preferably 5-10 pts. by wt. and in the case the weight ratio is less than 1 pts. by wt., the conpensating effect is too small and in the case the weight ratio is more than 20 pts. by wt., the positive material may be cracked at the time of polymerization and peeled out of an electric collector. The bulk density of the positive electrode should be 2.2g/cm<3> or higher. |
