reported flexible TFMSC devices could be directly mounted on the human skin to ensure the functionality of miniaturized electronics, such as artificial skins, wearable electronics, flexible sensors, and integrated circuitries. [30,31] The main challenges of designing and developing skinmountable TFMSCs are listed as follows: 1) The TFMSCs should be solid-state. The application of liquid electrolyte-based TFMSCs has been limited by possible leakage of toxic or corrosive electrolytes and undesired packaging issue. [32] 2) The TFMSCs must have high flexibility, pliability, and stretchability to fit the skin well. 3) The energy storage unit should have good capacitive properties and not be severely sacrificed by body movement. 4) The skin-mountable device must fulfill the requirement of biocompatibility. Therefore, the rational design and development of solid skin-mountable TFMSCs with excellent skin adhesion, flexibility, and security are highly appealing.In this study, solid in-plane TFMSCs were developed for skin-mountable and high efficient energy storages by using flexible medical tape with great skin adhesion. The design idea was inspired by the fact that graphite layer is easy to be coated on medical tape by a simple drawing process and then MnO 2 layer can be easily deposited on it through a mild in situ redox method, as seen in Figure 1a. We choose the highly bendable and stretchable medical tape as microscopic structural support and medical polymethyl methacrylate (MPMMA) as the skinmountable layer. Such plaster-like SCs can be directly mounted on the human skin by a simple uncovering-affixing procedure. The TFMSCs not only exhibit superior skin adhesion, stretchability, flexibility, and biocompatibility, but also possess outstanding electrochemical performances, such as exceptional rate capability and cycling stability. High flexibility enables the skin-mountable TFMSCs to maintain relatively stable capacitive properties when suffering from various deformations originating from the movements of the body. Especially, the obtained solid skin-mountable TFMSCs can be repeatedly distorted with the elbow bent from 0° to 90°, and the value of capacitance keeps more than 90% after 200 bending cycles. This may provide a robust strategy for development and application of integrated and skin-mountable energy storage devices. Figure 1b,c and Figure S1a (Supporting Information) illustrate the scanning electron microscope (SEM) images of surface morphologies of medical tape substrate with the fiber diameter of around 10-20 µm. The rough and porous surface structures of medical tape facilitate exfoliation and adhesion of the graphitic material when using a pencil to draw on it under the guide of a mould. A stripe of graphitic flakes were deposited (Figure 1d and Figure S1b, Supporting Information), which enables the formation of a continuous conducting path on the surface and the In this study, integrated plaster-like micro-supercapacitors based on medical adhesive tapes are fabricated by a simple pencil drawing process ...

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Owing to the lattice match, large-scale aligned crystalline CH3NH3PbI3 perovskite array films were fabricated on ST cut quartz.