Recyclable G-quadruplex-driven hydrogel electrolyte for interface-compatible sustainable supercapacitors.

Sustainable hydrogel-based supercapacitors are emerging as promising options for safe and green energy storage solutions, but suffer from low energy density and non-recyclability. Herein, a G-quadruplex-driven hydrogel electrolyte with recyclability and ion channels is successfully designed and applied to construct interface-compatible sustainable supercapacitors. The G-quadruplex-driven supramolecular network with ion channels not only enables hydrogel electrolytes to achieve high ionic conductivity, but also imparts thermally activated reversible regulation of network structure for the construction of interface-compatible supercapacitors. The G-quadruplex-driven hydrogel supercapacitors possess a high specific capacitance of 207.1 mF cm and an energy density of 156.5 μW cm at 0.386 mW cm. More importantly, the G-quadruplex-driven hydrogel electrolyte demonstrates excellent recyclability. The reconstructed hydrogel electrolytes and supercapacitors maintain comprehensive properties similar to those of the original materials. This strategy for the G-quadruplex-driven recyclable hydrogel electrolyte offers valuable insights into sustainable energy materials and energy storage devices.