Co-TCPP/MXene film electrodes and patterned interdigital electrodes with high performance for flexible all-solid supercapacitors

With the development of electronic technology, portable and wearable electronics are becoming increasingly indispensable in our lives, which promotes a high demand for flexible power supplies. To develop lightweight, flexible, and high performance energy storage devices, we have prepared MXene and Co-TCPP nanosheet composites (CoMX) with excellent electrochemical properties by electrostatic self-assembly. Co-TCPP is inserted between MXene layers and successfully improves ion accessibility and enhances electrochemical performance. CoMX film electrodes fabricated by vacuum filtration show high specific capacitance (1591.7 mF/cm2) and exhibit excellent cycling stability, with a capacity retention rate of 99.81 % after 8000 cycles. Flexible all-solidstate supercapacitors (SC) assembled with CoMX film and interdigital electrodes both exhibit excellent capacitance performance. The in-plane SC exhibits competitive specific capacitance (330.0 mF/cm2) and energy density (37.13 & mu;Wh/cm2 at 450 & mu;W/cm2). The specific capacitance and energy density of interdigital SC achieve 89.9 mF/cm2 and 12.9 & mu;Wh/cm2, respectively. The competitive performance of both devices makes them highly promising for flexible energy storage devices.

Automated summary

With the development of electronic technology, there is an increasing demand for flexible power supplies in portable and wearable electronics. Researchers have developed MXene and Co-TCPP nanosheet composites (CoMX) with excellent electrochemical properties through electrostatic self-assembly. The CoMX film electrodes exhibit high specific capacitance and excellent cycling stability, making them promising for flexible energy storage devices.