19 February 2024 | Chang Gao, Qing You, Jiancheng Huang, Jingye Sun, Xuan Yao, Mingqiang Zhu, Yang Zhao, Tao Deng
This article presents an ultraconformable integrated wireless charging micro-supercapacitor (IWC-MSC) skin, which is designed to be flexible, lightweight, and capable of wireless charging. The IWC-MSC is fabricated using solution-processed materials, where all components—electrolyte, electrode, and substrate—are derived from liquid precursors. The device is formed through evaporation and infiltration of these precursors, resulting in a compact, all-in-one structure. The electrode thickness can be precisely controlled by adjusting the volume of the electrode solution precursor, ranging from 11.7 to 112.5 μm. The IWC-MSC is capable of storing electricity into high-capacity micro-supercapacitors (11.39 F cm⁻³) and conforms well to the human body's curved surface. The device is wireless charged and demonstrates excellent electrochemical performance, including high volumetric capacitance, energy density, and power density. The IWC-MSC is also highly flexible and can withstand large deformations such as rolling and crumpling without affecting its performance. The device is applied in electronic skin, microrobots, and other wearable electronics. The study highlights the potential of the IWC-MSC as a self-powered, skin-like energy storage device for flexible and conformable electronics.This article presents an ultraconformable integrated wireless charging micro-supercapacitor (IWC-MSC) skin, which is designed to be flexible, lightweight, and capable of wireless charging. The IWC-MSC is fabricated using solution-processed materials, where all components—electrolyte, electrode, and substrate—are derived from liquid precursors. The device is formed through evaporation and infiltration of these precursors, resulting in a compact, all-in-one structure. The electrode thickness can be precisely controlled by adjusting the volume of the electrode solution precursor, ranging from 11.7 to 112.5 μm. The IWC-MSC is capable of storing electricity into high-capacity micro-supercapacitors (11.39 F cm⁻³) and conforms well to the human body's curved surface. The device is wireless charged and demonstrates excellent electrochemical performance, including high volumetric capacitance, energy density, and power density. The IWC-MSC is also highly flexible and can withstand large deformations such as rolling and crumpling without affecting its performance. The device is applied in electronic skin, microrobots, and other wearable electronics. The study highlights the potential of the IWC-MSC as a self-powered, skin-like energy storage device for flexible and conformable electronics.