abstract |
PROBLEM TO BE SOLVED: To provide an energy storage device electrode undercoat foil capable of ultrasonic welding and providing a low-resistance energy storage device, and an energy storage device electrode and an energy storage device provided with the undercoat foil. A current collecting substrate and an undercoat layer formed on at least one surface of the current collecting substrate, the undercoat layer containing carbon nanotubes, and each surface of the current collecting substrate An undercoat foil for an energy storage device electrode having a basis weight of 0.1 g / m 2 or less. [Selection figure] None |