ELECTRODE FOR SECONDARY BATTERY, SECONDARY BATTERY, AND MANUFACTURING METHOD OF THE ELECTRODE AND THE SECONDARY BATTERY

摘要

Electrode 6 for a secondary battery to be laminated with another type of electrode 1, with separator 20 interposed therebetween, to constitute a battery electrode assembly, is comprised of collector 8 and active material layer 7 formed on collector 8, and electrode 6 includes a coated part in which active material layer 7 is formed on collector 8 and an uncoated part in which active material layer 7 is not formed on collector 8. Active material layer 7 includes, in at least a part of the outer peripheral portion of the coated part, high density part 7a having a smaller thickness and a higher density than those of a portion other than the outer peripheral portion.

主权项

1. An electrode for a secondary battery to be laminated with another type of electrode, with a separator interposed therebetween, to constitute a battery electrode assembly, which is comprised of a collector and an active material layer formed on the collector; comprising
a coated part in which the active material layer is formed on the collector; and an uncoated part in which the active material layer is not formed on the collector, wherein the active material layer includes, in at least a part of an outer peripheral portion of the coated part, a high density part having a smaller thickness and a higher density than those of a portion other than the outer peripheral portion.