Current Collector Apparatus

A current collector apparatus is provided. In one aspect, a current collector includes a first metallic layer, a second metallic layer, and a porous polymeric layer positioned between the first metallic layer and the second metallic layer. In another aspect, a current collector employs a porous polymeric layer including pores and metallic particles disposed therein. The metallic particles electrically connect the first and second metallic layers. Each of a first metallic layer and a second metallic layer has a first average thickness that is about 1 nanometer to about 5 micrometers, a porous polymeric layer has a second average thickness that is about 10 nanometers to about 200 micrometers, and/or the current collector has a third average thickness that is about 12 nanometers to about 210 micrometers.