Design and Construction of Novel High-Performance Paper-Based Flexible Micro-Supercapacitors

Abstract

With the rapid development of flexible portable/wearable devices, it is highly desirable to develop the flexible energy storage and conversion devices to meet these demands. Among these devices, flexible supercapacitors have caused great attention due to its excellent electrochemical performance, flexibility and compatibility. However, it is still a huge challenge to design and construct the flexible supercapacitors with outstanding performances. In this case, we design and prepare the paper-based flexible micro-supercapacitors with PEDOT-CNTs/Ag film as electrode material by ink-jet printing technology. Encouragingly, the resulting paper-based micro-supercapacitors show outstanding electrochemical performances including the ultra-high scan rates (up to 10000 mV/s), excellent rate capability, fast frequency responsibility (With short relaxation time constant of 8.5 ms), high specific capacitance, and long-term cycling stability (92% retention after 10000 cycles). These encouraging results presented here make the paper-based micro-supercapacitors promising application as power source for flexible portable/wearable devices, and also provide a reference for the construction of flexible micro-supercapacitors and other energy devices.