| 摘要 |
PURPOSE:To restrict the swelling of electrode with charge and discharge, and to improve the cycle characteristic by forming a part of a contact of a grid, which is made of metal foaming material, into a web form, and using it as a base of a past type nickel electrode. CONSTITUTION:A nickel foaming material, for example, 0.14mm in thickness and 600kg/cm<2> in unit weight, and 95% in hole ratio, in which one part of a contact of a grid 1 formed of nickel in a type figure of observation by an electron microscope is formed into a web shape 2, is used as a base. This base is filled with the active material paste, which is mainly composed of nickel hydroxide, and dried, and pressurized by a presser to a thickness at 0.66mm, and cut at a predetermined dimension, and a collecting tab is fitted to form a nickel electrode. This nickel electrode has a large mechanical strength of the base, and swelling of the electrode due to the generation of gamma-NiOOH with charge/discharge is restricted to improve the cycle characteristic. |
