High-energy all-in-one micro-supercapacitors based on ZnO mesoporous nanosheet-decorated laser-induced porous graphene foams

Micro-supercapacitors with high power density and stability promise emerging energy storage devices. However, their relatively low poor mechanical largely restricts application. Here, we report an all-in-one planar micro-supercapacitor (MSC) using ZnO nanosheets anchored on the porous 3D laser-induced graphene foams (ZnO@LIG) as electrode materials. Due to networks, hybrid exhibits fast charge transfer diffusion channels. More importantly, approach can simultaneously take advantage of double-layer capacitance faradaic mechanisms. The ZnO@LIG displays a specific 14.7 F cm−2, remarkable rate capability cycling stability. Furthermore, MSC showcases (10.0 Wh kg−1), (0.5 long-term stability, excellent upon bending. performance parameters make it one promising micropower sources for flexible microelectronics.Graphic abstract