Self-assembled samarium selenide nanorods as a new electrode material for reliable supercapacitors

[Display omitted] •The cross-linked samarium selenide nanorods were self-assembled by chemical route.•The Sm2Se3 nanorods showed a maximum specific capacitance of 316 F g−1.•The Sm2Se3 nanorods exhibited cycling stability of 87% after 1000 cycles. For the first time, cross-linked nanorods of samarium selenide (Sm2Se3) were self-assembled using the chemical route for reliable supercapacitors. The X-ray diffraction and X-ray photoelectron spectroscopy techniques confirmed the formation of crystalline Sm2Se3. The formation of Sm2Se3 across-linked nanorods was confirmed by field emission scanning electron microscopy technique. The cyclic voltammetry, charge-discharge, and electrochemical impedance spectroscopy were used to study the supercapacitive properties of the electrode. The highly porous network of the electrode resulted from this assembly exhibited excellent capacitive behavior with a maximum specific capacitance (316 F g−1) and cycling stability (87%) for 1000 charge-discharge cycles.