High performance NiCoSe₂@NiFe-MOF@AC Nanocomposite electrode for energy storage and precise detection of mono-sodium glutamate

Abstract Hybrid supercapacitors, a fascinating appliances that combines the best of both batteries and supercapacitors, showcase remarkable improvements in power and energy densities. Here, a two-step technique was used to synthesis NiCoSe 2 @NiFe-MOF. In first step NiCoS was synthesis using electrodeposition approach and in second step the NiCoSe 2 @NiFe-MOF was synthesis using vacuum-assisted filtering. The specific capacitance of the NiCoSe 2 @NiFe-MOF composite used as the supercapacitor electrode in a three-electrode system was (2882.5 F g −1 ) and specific capacity is 1729.8 C g −1 , much greater than that of the NiCoSe 2 electrode material which was 967.4 C g −1 at current density of 1.5 Ag −1 , In addition, a hybrid supercapacitor device (NiCoSe 2 @NiFe-MOF//AC) has been developed and successfully demonstrates a specific capacity of 205.45 C g −1 at 0.5 A g −1 . The energy density is measured in units of WhKg −1 with a numeric values of 78.3, while at 2.9 KWKg −1 the power density is recorded. This device has been tested for up to five thousands cycles of discharging (87.8%) and charging (94.2%), achieving an impressive capacity retention rate of 96.8%.Additionally, an amperometric immunosensor was fabricated by employing the NiCoSe 2 @NiFe-MOF nanocomposite to detect Mono-Sodium Glutamate (MSG). A constant linear association was observed between the concentration of MSG and the variation in current, encompassing the entire detection range of 0.05–200 μM. The findings of our study offer an exciting starting point for the development of energy storage systems with greater capacity.