摘要 |
PURPOSE:To prevent the dispersion of battery performance such as an open circuit voltage and internal resistance by use of fine particles of alumina as a binder of a cathode black mix of an organic electrolyte battery having an anode active material of lithium. CONSTITUTION:An anode material 3 comprising a lithium disc is faced, via a separator 4, with a cathode black mix 5 which is prepared in such a way that fine particles of alumina having the mean particle size of 5-100mmum are mixed in water with a cathode active material such as manganese dioxide and a conductive material such as flake graphite, and the mixture is dried, granulated, rounded to make granules, and dried to prepare cathode black mix powder, and thn pressed to form a pellet. Therefore, from the reason that alumina does not react with the cathode active material such as manganese dioxide during heat- treatment of the cathode black mix after being pressed, the decrease of discharge capacity and the dispersion of an circuit voltage and internal resistance of a battery can be significantly improved. |