Science Daily April 24, 2024
Researchers in South Korea fabricated deformable micro supercapacitors (MSCs) based on eutectic gallium-indium liquid metal (EGaIn) current collectors with integrated graphene using laser ablation because of strong laser absorption of graphene and EGaIn. By controlling the gap size between neighboring interdigitated electrodes and mass loading of graphene, they were able to get a high areal capacitance with reliable rate performance. Because of the intrinsic liquid characteristics of EGaIn current collector, the areal capacitance of fabricated MSC retained 90% of original value even after repetitive folding and 20% stretching up to 1000 cycles. They successfully integrated deformable MSC with a commercial light-emitting diode to demonstrate the feasibility of MSC as a deformable power source. It operated stably under various mechanical deformations, including stretching, folding, twisting, and wrinkling… read more. Open Access TECHNICAL ARTICLE
Laser ablation optimization. Credit: npj Flexible Electronics volume 8, Article number: 18 (2024)