Two-photon-induced stretchable graphene supercapacitors.

ABSTRACT: Direct laser writing with an ultrashort laser beam pulses has emerged as a cost-effective single step technology for realizing high spatial resolution features of three-dimensional structures in confined footprints with potential for large area fabrication. Here we present the two-photon direct laser writing technology to develop high-performance stretchable biomimetic three-dimensional micro-supercapacitors with the fractal electrode distance down to 1?µm. With multilayered graphene oxide films, we show the charge transfer capability enhanced by order of 10² while the energy storage density exceeds the results in current lithium-ion batteries. The stretchability and the volumetric capacitance are increased to 150% and 86?mF/cm³ (0.181?mF/cm²), respectively. This additive nanofabrication method is highly desirable for the development of self-sustainable stretchable energy storage integrated with wearable technologies. The flexible and stretchable energy storage with a high energy density opens the new opportunity for on-chip sensing, imaging, and monitoring.

SUBMITTER: Thekkekara LV 

PROVIDER: S-EPMC6079041 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature