costs of this article. REFERENCES

the electronic onductivity between grid and active mate-rial. In other words, the passivation at the interface be-tween grid and active material takes place and, as a result, the charge characteristics of a lead-acid battery become worse. In order to avoid the formation of lead sulfate at the interface between a grid and an active material, some sta-ble layer must be formed at the interface region between the grid and the active material. In this study, only the effect of lead sulfate was dis-cussed. However, lead monoxide is formed in the practical battery, in which the Pb-Sb alloy is used as a grid material. The effect of lead monoxide must be studied. Manuscript submitted Feb. 24, 1988; revised manuscr ipt received Aug. 5, 1988. This was Paper 127 presented at th