Simplified fabrication of high areal capacitance all-solid-state micro-supercapacitors based on graphene and MnO2 nanosheets

A universal simplified strategy was developed to fabricate all-solid-state planar micro-supercapacitors with high areal capacitance (∼355 mF/cm2), based on interdigital patterned films of 2D pseudocapacitive MnO2 nanosheets and electrochemically exfoliated graphene.