Stretchable MXene-elastomer nanodielectrics for skin electronics.

Structural capacitors function as both energy storage devices and structural parts, which allows a significant weight and volume reduction. MXene-based nanocomposites show great promise as structural dielectric capacitors due to their superior mechanical properties and high energy density potential. MXenes are 2D transition metal (M) carbides, nitrides or borides (X) with extraordinary surface area, mechanical and electrical properties. Unlike graphene, MXenes do not degrade by the deposition of an insulating shell or integration in a dielectric polymer as a conductive 2D nanofiller. This research will target the synthesis of MXene-based nanodielectric capacitors with controlled MXene flake alignment and shell deposition. The synergistic effect of these parameters on the electrical and mechanical properties of the nanodielectric will be investigated by theory, simulations and experiments. The potential of the optimized nanodielectric to achieve outstanding energy/power density (how much/fast energy can be (dis)charged) and mechanical performance will be demonstrated in a structural capacitor with carbon fiber electrodes. The outcome of this project contributes to 'net zero weight' energy storage solutions, which are paramount for efficient electric vehicles and other portable devices.