Abstract:

A certain amount of tetrabasic lead sulphate（4BS）was added to the positive lead powder of lead-acid batteries to produce the positive plates with the raw materials containing different volume of 4BS by the industrialized operation,being combined with regular negative ones to form small batteries.The initial capacity,cycle life and other electro-chemical performance of the positive was measured.The results indicated that with the addition of 4BS with the mass fraction of 1% and grain diameter of 1.5 μm into the raw materials and then being solidified at 65 ℃,the initial capacity and cycle life of positive plates were respectively 1.02 and 1.06 times than those without the addition of 4BS.The addition of 4BS enhanced the comprehensive performance such as battery′s capacity and life.The XRD spectrum showed that the positive plates with the addition of 4BS into the raw materials were higher in content of β-PbO₂ than those without the addition of 4BS while the SEM revealed that the active substance was more fine and even in the positive plates with the addition of 4BS.

Key words: lead-acid battery, tetrabasic lead sulphate, positive plate, battery capacity, cycle life