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• W2933132320 abstract "Abstract As electrode materials for supercapacitors, nanostructured hybrids always show better performance compared to corresponding single material. In this work, Ni(OH)2 flakes/MnO2 nanosheets hybrid hierarchical architecture (Ni(OH)2/MnO2 HHA) was constructed on Ni foam (NF) through a two-step hydrothermal reaction. Interestingly, MnO2 nanosheets are vertically grown on the both sides of Ni(OH)2 flakes, forming a highly porous structure with large specific surface area and amounts of diffusion channels. As a binder-free electrode for supercapacitors, Ni(OH)2/MnO2 HHA/NF exhibits a high specific capacity of 253.6 mAh g−1 at 2 A g−1, which is much higher than the individual Ni(OH)2 and MnO2. The excellent electrochemical performance can be attributed to the highly porous architecture, two-dimensional (2D) feature and synergistic effect between Ni(OH)2 and MnO2. The asymmetric hybrid supercapacitor was assembled using Ni(OH)2/MnO2 HHA/NF (24 h) as positive electrode and activated carbon (AC) as negative electrode in 3 M KOH. The hybrid supercapacitor cell can be cycled in the voltage window of 0–1.9 V and exhibits a maximum specific energy of 29.9 Wh kg−1 at 1900 W kg−1. The results indicate that the Ni(OH)2/MnO2 HHA/NF electrode shows great potential in design of high-performance energy storage devices. The construction of this 2D branched hierarchical architecture provides an effective method to obtain excellent electrode materials for energy storage." @default.
• W2933132320 created "2019-04-11" @default.
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• W2933132320 date "2019-06-01" @default.
• W2933132320 modified "2023-10-17" @default.
• W2933132320 title "Rationally design of 2D branched Ni(OH)2/MnO2 hybrid hierarchical architecture on Ni foam for high performance supercapacitors" @default.
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• W2933132320 doi "https://doi.org/10.1016/j.electacta.2019.03.229" @default.
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