A device can include a battery electrode that comprises a substrate having one or more polymeric materials and a layer disposed on the substrate. The layer can include one or more conductive materials, have a thickness no greater than 12 micrometers, and h...

The present invention relates to a composite current collector and its preparation method, electrodes, and batteries. The composite current collector includes an insulating substrate, a first metal layer set on both surfaces of the thickness direction of t...