Researchers from Japan's NIMS institute developed a way to produce products based on structured graphene that is 'glued' to a 3D strutted framework.
The researchers say their method was inspired by the blown sugar art, and they call it the "chemical blowing method". In their method, glucose and ammonium salt are mixed and heated (at 250 degrees Celsius), which results in glucose-deriving polymers. The released ammonia gases blow polymers by creating pressure from within.
The 3D structure is formed as a strutted 3D structure. The researchers then heat it up at 1,350 degrees - and this turns the polymer walls into graphene.
As part of the research, electrochemical capacitor electrodes were developed - and these achieve a high specific power density.