Which is better, pi heating film or graphene?

PI heating film is made of polyimide film as external insulator and metal foil or wire as internal conductive heating element by high temperature and high pressure heat sealing. PI heating film has excellent insulation strength, electrical strength, heat conduction efficiency and resistance stability, and has been successfully applied to temperature control and heating systems such as satellites, launch vehicles and missiles.

Graphene is a two-dimensional carbon nano-material with hexagonal honeycomb lattice composed of sp2 hybridized orbital carbon atoms, which has excellent optical and mechanical properties and is considered as a revolutionary material in the future. Graphene is the thinnest, strongest and best conductive nano-material discovered so far, which has an important application prospect in the fields of material science, micro-nano processing, biomedicine and so on.