Patent ID: 6802917
Filing Date: 2004-10-12
Classification: H01M,Y02E

Abstract:
A method of manufacturing a metallic current collector for use in an electrochemical or galvanic cell, comprising the steps of:(i) perforating a solid, flat metal strip using a continuous process that results in deformation of the strip at least locally near the perforations, wherein said deformation expressed by the ratio of the strip thickness before and after deformation is less than 10%; and (ii) immediately following step (i), annealing the perforated strip at a temperature below the melting point of said metal or metal-alloy to yield a special grain boundary content of at least 50% in deformed portions of the strip; with the proviso that said metal consists of lead or lead alloyed with an element selected from the group consisting of Ca, Sr, Ba, Al, Sn, Ag, Bi, and combinations thereof.