Graphene-based in-plane micro-supercapacitors with high power and energy densities

Micro-supercapacitors are important on-chip micro-power sources for miniaturized electronic devices. Although the performance of micro-supercapacitors has been significantly advanced by fabricating nanostructured materials, developing thin-film manufacture technologies and device architectures, their power or energy densities remain far from those of electrolytic capacitors or lithium thin-film batteries. Here we demonstrate graphene-based in-plane interdigital micro-supercapacitors on arbitrary substrates. The resulting micro-supercapacitors deliver an area capacitance of 80.7 μF cm−2 and a stack capacitance of 17.9 F cm−3. Further, they show a power density of 495 W cm−3 that is higher than electrolytic…

• GF
  Graphene Flagship

  Awards: CNECT-ICT-604391, 604391
• DF
  Deutsche Forschungsgemeinschaft

  Award: SPP 1459
• ES
  European Social Fund