A NiSe–G∥AC asymmetric supercapacitor with both pseudocapacitance and EDLC mechanisms provides an energy density of 50.1 W h kg ⁻¹ and a power density of 816 W kg ⁻¹ .

Restrained morphology and structural engineering of layered V ₂ O ₅ by the oxidation of V-MXene to form a unique V ₂ O ₅ @V ₂ C nanohybrids at different temperature and used as a cathode material for aqueous Zn-ion batteries (ZIBs).

A sonochemical route is used to prepare a few layers of MoSe ₂ and its 2D–2D nanohybrid is prepared with graphene by a solvothermal process. This nanohybrid exhibits a high specific capacitance of 945 F g ⁻¹ . An ASC device MoSe ₂ /G‖AC is fabricated, which delivers an energy density of 26.6 W h kg ⁻¹ and a power density of 0.8 kW kg ⁻¹ .