In order to achieve a sustainable future, researchers must continue to research improved electrode materials. Considering the high electronic conductivity, versatile redox activity, and enhanced energy storage performance, nanostructures have… Click to show full abstract
In order to achieve a sustainable future, researchers must continue to research improved electrode materials. Considering the high electronic conductivity, versatile redox activity, and enhanced energy storage performance, nanostructures have been employed as a novel electrode material for high‐performance lithium‐ion batteries (LIBs) and supercapacitors. Herein, carbon‐coated selenium‐rich trimetallic selenide (Cu2NiSnSe4@C) nanoparticles (NPs) as an efficient electrode material in energy storage devices are prepared. The prepared core‐shell Cu2NiSnSe4@C NPs electrode is employed as an anode material for LIBs, which demonstrated a high reversible specific capacity of 988.46 mA h g−1 over 100 cycles at 0.1 A g−1 with good rate capability. Additionally, the core‐shell Cu2NiSnSe4@C NPs electrode exhibited an outstanding capacity of 202.5 mA h g−1 at 5 A g−1 even after 10 000 cycles. Exploiting the synergistic characteristics, the core‐shell Cu2NiSnSe4@C NPs material is also investigated as a battery‐type electrode for hybrid supercapacitors. The assembled hybrid supercapacitor with Cu2NiSnSe4@C NPs and activated carbon showed excellent rate capability including high power (5597.77 W kg−1) and energy (64.26 Wh kg−1) densities. Considering the simple synthesis and enhanced energy storage properties, carbon‐coated selenium‐rich trimetallic selenide can be used as a durable electrode material for practical energy storage devices.
               
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