Deformable moisture-activated all-solid-state planar microsupercapacitors

Recent advances in developing soft electronic devices have increased the demand for deformable storage devices. However, the fabrication of microsupercapacitors (MSCs) with satisfactory electrochemical performance and mechanical robustness remains a crucial challenge. In this work, deformable moisture-activated all-solid-state planar MSCs were designed and fabricated by an in situ laser reduction technology. The planar MSC shows a high areal-specific capacitance (∼4.7 mF cm⁻² at 5 mV s⁻¹) under high moisture (RH = 100%). Moreover, the tensile strength of the deformable planar MSC increased to 21 MPa. Moreover, the mechanical robustness of the planar MSC allows them to be folded into origami. The deformable moisture-activated all-solid-state planar MSC holds promises for soft storage devices.