Energy storage device and method of production thereof

An energy storage device comprising

• a first electrode,
• a second electrode, and
• a solid multilayer structure disposed between said first and second electrodes,
• wherein said electrodes are flat and planar and positioned parallel to each other, and
• wherein said solid multilayer structure comprises m insulating and conductive layers,
• said layers are disposed parallel to said electrodes, and
• said layers have the following sequence:
• A-B-(A-B- . . . A-B-)A, where
• A is a homogeneous insulating layer which comprises an insulating dielectric material,
• B is a homogeneous conductive layer, and
• m is equal to 3 or more,
• wherein an insulating layer thickness (dins), a conductive layer thickness (dcond , a number) of the insulating layers (nins ≧2), a dielectric permittivity of the insulating dielectric material (∈ins) and a dielectric permittivity of the conductive layer (∈cond) satisfy the following relation:
• dcond=p·(nins/(nins−1)·(∈cond/∈ins)·dins, where p≧3.