Development of positive electrodes with an SnO_2 coating by applying a sputtering technique for lead-acid batteries

摘要

In order to prevent positive grid corrosion and to obtain a long life for positive electrodes of lead-acid batteries, a conductive and corrosion resistant SnO_2 (tin dioxide) layer was formed on a Ti (titanium) substrate by a conventional dip-coating method. However, it is impossible to apply this method to a Pb (lead) substrate, because the dip-coating method needs a calcination process, at a temperature higher (conventionally from 450 to 600deg.c) than the melting point of Pb (T_m: 327deg.C).