| 摘要 |
PURPOSE:To improve performance of a negative plate in the initial and the final period of its life cycle, by adding lignine of small molecular weight and lignine of large molecular weight into an active material for the negative plate as an addition agent. CONSTITUTION:A negative plate for a lead storage battery is formed by adding lignine 1,000-2,000 in small averaged molecular weight and lignine 10,000- 20,000 in large averaged molecular weight in proportion 1:1 into a negative electrode active material. Accordingly, since the lignine performs action such that rapid crystal growth of a reactive product at electric charge and discharge time is suppressed and generation of a coarse crystal is prevented further a low temperature high efficient electric discharge characteristic is improved, the lignine, whose molecular weight is formed by mixing the lignine of small molecular weight in the lignine of large molecular weight, is added, and prompt and delay actionof effectiveness of the lignine for a maintaining effect of porosity of a negative electrode active material is utilized, then both initial performance and life performance can be improved. |
