In situ grown core/shell heterostructure of CuCo2O4/NiCo-LDH composite intercalated by glucose on Ni networks for all-solid-state hybrid supercapacitor electrodes
JOURNAL OF ENERGY STORAGE(2023)
摘要
Hybrid supercapacitors (HSCs) have attracted widespread attention due to their unique combination of high power density and high energy density. Thus, they offer a practical and cost-effective solution for energy storage and power delivery, contributing to the development of a promising technology for various applications. However, the electrochemical performance largely relies on the selection of electrode materials. Here, we suggest composite electrodes of glucose-intercalated CuCo2O4/NiCo-G-layered double hydroxide (LDH) formed with core/shell heterostructures on Ni foam for high-performance HSCs. The strong synergistic effects of the CuCo2O4 core and glucose-intercalated NiCo-G-LDH shell with unique morphology enhance the excellent electrochemical properties by forming a synergistic effect that overcomes the drawbacks of individual materials. The specific capacity of the core/shell structure as a supercapacitor electrode at 1 A g−1 is 378 mAh g−1 and ∼113% is retained after 5000 cycles. In addition, by the integration of the glucose-intercalated CuCo2O4/NiCo-G-LDH with activated carbon, the configured HSC device presents an energy density of ∼37.2 Wh kg−1 at a power density of ∼775.5 W kg−1. Our work offers a robust strategy to create a core/shell composite with excellent stability and durability, making it suitable for use in high-performance energy storage devices.
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关键词
Core/shell structure,Glucose,CuCo2O4,NiCo-LDH,Hybrid supercapacitor
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