Synergistic integration of molybdenum telluride grown on carbon nanofibers for high-performance flexible microsupercapacitors

The growing demand for sustainable, flexible energy storage systems has intensified interest in microsupercapacitors (MSCs) due to their high-power density, long cycle life, and compatibility with wearable electronics. In this study, a high-performance, printable conductive ink was formulated using a MoTe₂/carbon nanofiber (CNF) nanocomposite, combining the high conductivity and redox activity of MoTe₂ with the structural integrity and electric double-layer capacitance of CNFs. The ink exhibited excellent rheological properties (viscosity ≈ 6646.4 mPa.s at 25°C) and stable dispersion, enabling uniform screen-printing on flexible polyethylene terephthalate (PET) substrates. The resulting MSCs delivered a high areal capacitance of 203.28 mFcm⁻² at 5 mVs⁻¹, with an energy density of 20.78 µWhcm⁻² and a power density of 333.2 µWcm⁻². The devices retained 90.9 % of their initial capacitance after 5000 charge-discharge cycles and maintained performance under repeated mechanical bending, confirming excellent flexibility and durability. This work demonstrates a scalable and eco-friendly route to fabricate flexible MSCs with enhanced electrochemical performance for next-generation portable electronics.