Recently, 2D nanomaterials such as transition metal carbides or nitrides (MXenes) and transition metal dichalcogenides (TMDs) have attracted ample attention in the field of energy storage devices specifically in supercapacitors (SCs) because of their high metallic conductivity, wide interlayer spacing, large surface area, and 2D layered structures. However, the low potential window (ΔV ≈ 0.6 V) of MXene e.g., Ti3 C2 Tx limits the energy density of the SCs. Herein, asymmetric supercapacitors (ASCs) are fabricated by assembling the exfoliated Ti3 C2 Tx (Ex-Ti3 C2 Tx ) as the negative electrode and transition metal chalcogenide (MoS3- x ) coated 3D-printed nanocarbon framework (MoS3- x @3DnCF) as the positive electrode utilizing polyvinyl alcohol (PVA)/H2 SO4 gel electrolyte, which provides a wide ΔV of 1.6 V. The Ex-Ti3 C2 Tx possesses wrinkled sheets which prevent the restacking of Ti3 C2 Tx 2D layers. The MoS3- x @3DnCF holds a porous structure and offers diffusion-controlled intercalated pseudocapacitance that enhances the overall capacitance. The 3D printing allows a facile fabrication of customized shaped MoS3- x @3DnCF electrodes. Employing the advantages of the 3D-printing facilities, two different ASCs, such as sandwich- and interdigitated-configurations are fabricated. The customized ASCs provide excellent capacitive performance. Such ASCs combining the MXene and electroactive 3D-printed nanocarbon framework can be used as potential energy storage devices in modern electronics.

D Printing and Innovation Hub Department of Food Technology Mendel University in Brno Zemedelska 1 Brno 61300 Czech Republic

Department of Chemical and Biomolecular Engineering Yonsei University 50 Yonsei ro Seodaemun gu Seoul 03722 South Korea

Department of Medical Research China Medical University Hospital China Medical University No 91 Hsueh Shih Road Taichung 40402 Taiwan

Future Energy and Innovation Laboratory Central European Institute of Technology Brno University of Technology Purkyňova 123 Brno 61200 Czech Republic

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