Facile synthesis of ultra-tensile hydrogels for flexible all-solid-state supercapacitor energy storage devices

In this paper, poly3-acrylamidophenylboronic acid crosslinked acrylamide hydrogel (P(AAPBA-co-AM) gel) with super tensile characteristics was prepared by acrylamide polymerization using 3-aminophenylboric acid as the raw material, which was used in flexible all-solid-state supercapacitors. By altering the crosslinking density, the gel’s tensile strength was optimized. It can be used as an ideal safe and non-toxic solid-state electrolyte for supercapacitors due to its ability to absorb aqueous electrolytes. The specific capacitance of the flexible supercapacitor is 116 F g −1 and the energy density is 16.11 Wh kg −1 . Additionally, the gel created with a solvent content of 65% may withstand a 5000% strain under 170 kPa stress while retaining electrochemical characteristics at various bending angles. This gel has exceptional tensile deformability, making it suitable for supercapacitors with varying needs. A non-covalent cross-linked flexible P (AAPBA-co-AM) gel was designed to be used as an electrolyte in supercapacitors. The capacitors not only have good electrochemical performance, but also keep stable performance under different degrees of bending and folding.