Doping Silver Nanoparticles with Noble Metals for Energy Storage and Conversion

The utilization of metal–organic frameworks (MOFs) as templates for the design and fabrication of supercapacitor electrode materials holds promising prospects. It can effectively solve the inherent defects of MOFs, such as poor conductivity and insufficient stability. This improvement is manifested through the amelioration of the electronic conductivity, optimization of ion transport, reinforcement of structural stability, and exertion of synergistic effects. Reasonable metal modification can further improve the comprehensive performance of materials such as doping silver nanoparticles (Ag-NPs). In this study, an innovative MOF derivatization technique was employed to successfully fabricate Aga–NiCoSe2 nanomaterials using the presynthesized NiCoSe2 as the substrate. The precise doping of noble metal Ag-NPs was achieved via a silver mirror-like reaction. The resultant material combines the high specific surface area and abundant active sites of multimetallic selenides with the excellent electrical conductivity of Ag-NPs, markedly enhancing the electrochemical performance of the supercapacitor electrode material. The prepared Ag3–NiCoSe2 material exhibited a high specific capacitance of 1126.4 C·g–1 at a current density of 1 A·g–1 and maintained 85% of its initial capacitance after 10 000 cycles. The assembled Ag3–NiCoSe2//AC supercapacitor achieved an energy density of 53.8 Wh·kg–1 at a high-power density of 750 W·kg–1, providing a novel option for the development of high-performance supercapacitor electrode materials.