CURRENT COLLECTOR, ELECTRODE, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

Provided is an electrode capable of effectively spreading or mitigating a stress generated by expansion and contraction of an active material. An active material layer is formed on a particular current collector so as to prepare an electrode. The current collector includes a base and a plurality of protrusions formed to extend outside from the surface of the base. A cross section of the respective protrusions in the thickness direction of the current collector has a tapered shape having a width in the direction parallel to the base surface narrowed toward the direction in which the protrusions extend from the base surface.