Hybrid microsupercapacitors based on Ti3C2Tx MXene and covalent organic frameworks

Abstract

The growing demand for emerging electronic applications, including energy storage, sensors, and portable devices, has created a pressing need to develop miniaturized flexible energy storage components with convenient device architecture. Here, we report an in-plane hybrid micro-supercapacitor made of covalent organic frameworks and Ti3C2Tx MXene as positive and negative electrodes, respectively. The devices utilize three-dimensional laser-scribed graphene (LSG) as a current collector for both electrodes using a CO2-laser-based technique due to its good resolution for in-plane device fabrication, and high porosity of LSG that can facilitate better rate performance. The constructed hybrid supercapacitor has a maximum areal capacitance of 131.46 mF/cm2 and a voltage window of 1.2 V. The findings provide a new strategy to fabricate a hybrid supercapacitor for self-powered device applications at the microscale.