Composite material

A composite material comprising:

• a metal foam, said metal foam in the form of a film;
• and
• a polymer on a surface of the metal foam,
• wherein the polymer forms a surface layer on the surface of the metal foam,
• wherein the polymer comprises a thermally conductive filler,
• wherein the metal foam has a thickness of 10 to 1,000 μm,
• wherein the total thickness (T) of the composite material is at most 3 times the thickness (MT) of the metal foam,
• wherein the volume (MV) of the metal foam is 0.25 to 1 times the volume (PV) of the polymer,
• wherein a volume of the thermally conductive filler is at most 30 vol % of the composite material,
• wherein the thermally conductive filler has a needle shape, a plate shape, a dendritic shape or a star shape, and
• wherein the thermal conductivity of the composite material is at least 3 W/mK as determined by calculating the thermal conductivity as equal to A×B×C, wherein A is the thermal diffusivity, B is the specific heat, and C is the density of the composite material.