Currently, most existing stretchable supercapacitors were fabricated based on buckled macrofilms of either carbon nanotubes or polypyrrole on PDMS 18, 32, 39, 40. They can sustain the maximum strain in the range of 30%–120% 18, 32, 39, 40, while their specific capacitances are generally in the range of 20–53 F g −1 (Fig. 5a).
While supercapacitors represent a promising candidate for unconventional energy-storage devices, existing stretchable supercapacitors are limited by their low stretchability, complicated fabrication process and high cost.
These graphene based-supercapacitor electrodes, however, are at most bendable and flexible but not stretchable. Currently, most existing stretchable supercapacitors were fabricated based on buckled macrofilms of either carbon nanotubes or polypyrrole on PDMS 18, 32, 39, 40.
The all-solid-state stretchable supercapacitors were characterized with a standard two-electrode system. Wagner, S. & Bauer, S. Materials for stretchable electronics. Mrs Bull. 37, 207–217 (2012). Lipomi, D. J. et al. Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes. Nat. Nanotechnol. 6, 788–792 (2011).
Herein, by synergistically combining 3D printing with electrodeposition, a 3D-printed stretchable structural supercapacitor with thick electrodes and a 3D Negative Poisson's Ratio (NPR) multicellular framework was developed.
To overcome this issue, super stretchable micro-pseudocapacitor electrodes composed of MXene nanosheets and in situ reconstructed Ag nanoparticles (Ag-NP-MXene) are herein demonstrated, delivering high energy density, stable operation voltage of ≈1 V, and fast charging capabilities.