Nitrogen-doped reduced graphene oxide for high-performance flexible all-solid-state micro-supercapacitors

Abstract

The rapid development of microelectronic devices has stimulated an increasing demand for micro-energy storage devices, typically, micro-supercapacitors (MSCs). Despite recent advances, the fabrication of MSCs using a facile, scalable and inexpensive method still remains challenging. In this work, we use a facile screen printing technique to fabricate flexible all-solid-state MSCs using N-doped reduced graphene oxide (rGO) as the electrode material. The effective area of MSCs and the thickness of the active material are only 0.396 cm² and 10 μm, respectively. The MSCs can deliver a high specific areal capacitance of 3.4 mF cm⁻², which is among the high values of graphene-based materials for all-solid-state MSCs reported so far. Easy fabrication and good performance make MSCs promising on-chip energy storage devices.