Research reveals carbon films can give microchips energy storage capability

This is a silicon wafer containing 40 micro-supercapacitors. Image: Lethien/IEMN

This is the layered structure of the carbon films on silicon chips. Image: A. Demortiere/LRCS

This is a supercapacitor under an optical microscope. To optimize space, its 18 electrodes are interdigitated. Image: CIRIMAT