Positive electrode lead paste for long-life silicon-based bipolar lead battery and preparation method thereof

A preparation method of a positive electrode lead paste for a long-life silicon-based bipolar lead battery, comprising the following steps:

• S1, adding a graphite powder, 4PbO·PbSO4, SnSO4, Ti4O7, Sb2O3, sodium perborate, and a short fiber to a lead powder according to a formula ratio to obtain a first resulting mixture, and dry-stirring the first resulting mixture for 4 min to 7 min until the graphite powder, the 4PbO·PbSO4, the SnSO4, the Ti4O7, the Sb2O3, the sodium perborate, and the short fiber are evenly dispersed in the lead powder to obtain a first premixture;
• S2, rapidly adding deionized water to the first premixture to obtain a second resulting mixture, and thoroughly stirring the second resulting mixture for 8 min to 13 min to obtain a second premixture;
• and
• S3, slowly adding dilute sulfuric acid with a density of (1.325-1.400)±0.003 g/cm3 to the second premixture within 10 min to 15 min to obtain a third resulting mixture, and stirring the third resulting mixture for 5 min to 10 min;
• and cooling the third resulting mixture to 50° C., measuring an apparent density of the third resulting mixture, and controlling the apparent density at 4.45±0.1 g/cm3.