| 摘要 |
PURPOSE:To obtain a large discharge capacity in an early stage of a cycle even when high amperage current is discharged at low temperatures by assembling and sealing a cell structure, and leaving the cell in a charged condition after formation composed of at least one time charging/discharging has been over. CONSTITUTION:Paste where 95% positive pole active material composed of nickel hydroxide by weight and 5% cobalt hydroxide by weight are kneaded with water, is filled in a foamed nickel porous body, and formed into a positive pole plate. Paste where hydrogen storage alloy powder which comprises ingots of a misch metal Ni3.6CO0.6Al0.4Mn0.3 smashed into pieces, and carbonblack are kneaded with PVA water solution, is coated on a nickel plated steel plate whose numerical aperture is 50%, and formed into a negative pole plate. The positive and negative pole plates are disposed while a separator is being held in electrolyte which comprises LiOH dissolved by a rate of 10g/l in the seven molar quantity of KOH water solution. The cell is charged for formation at 20 deg.C, at 180mA and for 28 hours, it is discharged for formation at 180mA until terminal voltage becomes 1.0V, it is charged again at 180mA for 8 hous, and it is left as is at 40 deg.C for seven days thereafter. |
