Highly Flexible and All-Solid-State Paper like Polymer Supercapacitors

In recent years, much effort have been dedicated to achieve thin, lightweight and even flexible energy-storage devices for wearable electronics Here we demonstrate a novel kind of ultrathin all-solid-state supercapacitor configuration with an extremely simple process using two slightly separated polyaniline-based electrodes well solidified in the H2SO4-polyvinyl alcohol gel electrolyte The thickness of the enure device is much comparable to that of a piece of commercial standard A4 print paper Under its highly flexible (twisting) state, the integrate device shows a high specific capacitance of 350 F/g for the electrode materials, well cycle stability after 1000 cycles and a leakage current of as small as 172 mu A Furthermore, due to its polymer-based component structure, it has a specific capacitance of as high as 31 4 F/g for the entire device, which is more than 6 times that of current high-level commercial supercapacitor products These highly flexible and all-solid-state paperlikc polymer supercapacitors may bring new design opportunities of device configuration for energy-storage devices in the future wearable electronic area