The invention discloses a long-life
silicon-based
bipolar lead storage battery positive
electrode lead paste and a preparation method thereof. The positive
electrode lead paste formula comprises the following components: lead
powder, short fibers,
graphite powder, SnSO4, Ti4O7, Sb2O3, 4PbO.PbSO4,
sodium perborate, dilute
sulfuric acid and deionized water. The preparation method comprises the steps: S1, uniformly dispersing
graphite powder, 4PbO.PbSO4, SnSO4, Ti4O7, Sb2O3,
sodium perborate materials and the short fibers into lead powder during preparation of lead paste, and carrying out dry stirring for 5 minutes until the materials are uniformly mixed, so as to prepare a premix 1; S2, quickly adding deionized water into the premix 1, and stirring for 10 minutes until the deionized water and the premix 1 are uniformly mixed, so as to obtain a premix 2; S3, slowly adding dilute
sulfuric acid into the premix 2, controlling the adding time to be 10 min and the mixing temperature to be 70 DEG C, continuously stirring for 10 min, cooling to 50 DEG C, measuring the
apparent density, and controlling the
apparent density to be 4.45+ / -0.1 g / cm<3>. According to the invention, the electric
conductivity of the lead paste can be obviously improved, the
softening and falling of the lead paste can be effectively delayed, and the cycle life cycle is prolonged.