| dc.description.abstract | Micro-supercapacitors (MSCs) are a new type of electrochemical energy storage components that have a high power density, high charge/discharge rate, small size, long cycle life, flexible, environmentally friendly, etc. However, the biggest challenges of MSCs is the limitation of high cost, electrolyte leakage, and complicated manufacturing processes. Therefore, this study aim to solve the manufacturing process and maintaining a high power density of MSCs by using the electrophoretic deposition (EPD. Here, we reported an all solid state and flexible MSCs by comprising the electrochemically exfoliated graphene (ECG) as electrode with the solid-state electrolyte through the controllable EPD process on carbon fiber (F-MSCs). This method shows a scalable, rapid, and eco-friendly process to fabricate and assemble F-MSCs with cost-effective and high-power/energy density.
As a result, the F-MCSc exhibit a high area capacitance of 179.9 mF/ cm2, and maintenance performance of capacitance even under the bending test (from 180o to 0o and back to 0o) with the capacity retention higher than 99%. Also, F-MCSc demonstrates a high cycle stability of up to 95% after 15000 cycles, which was attributed to creating a high diffusion path, promoting ion transport capability, and excellent mechanical flexibility. In addition, the energy and power density of F-MSCs are 63.96 Wh / cm2 and 23485.1 W / cm2, respectively. Furthermore, the output current and voltage of the F-MSCs can be further improved by using several micro-capacitor components with parallel and series connections to fulfill the practical demands of various applications. Finally, we demonstrated the as-prepared F-MSCs could be integrated into with clothing or different substrate materials. This work provides a cost-effective process to produce high energy and power density as well as the all solid state and flexible MSCs, which provids a new milestone for wearable components in the future. | en_US |