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- W2765247996 abstract "Abstract NiCo /NiCoMn-mixed hydroxides and ternary NiCo-MnO2 electrode materials were successfully synthesised by a force-driven hydrolysis of hydrated nickel, cobalt and manganese nitrate salts at 40 °C for 2 h with an additional annealing step adopted in producing the NiCo-MnO2 sample. The morphological, structural, compositional and textural characterization of the samples were obtained using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X‐ray powder diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and N2 physisorption respectively. The initial sample characterization confirmed bigger material agglomeration of the as-prepared mixed hydroxides compared to the NiCo-MnO2 sample which had small stacked sheet-like and porous morphology. Further sample analysis also confirmed a high degree of crystallinity in both the mixed hydroxides and NiCo-MnO2 samples with the elemental constituents existing in different oxidation states. One of the mixed hydroxides sample namely, NiCo(OH)2 exhibited a specific surface area (SSA) of approximately 3.40 m2 g−1 as compared to the ternary NiCo-MnO2 material which exhibited a higher SSA of 153.94 m2 g−1. The ternary NiCo-MnO2 electrode exhibited the highest specific capacity of 132.1 mAh g−1, compared to NiCo(OH)2 and NiCoMn-triple hydroxide (NiCoMn-TH) electrodes which exhibited a specific capacities of 110.3 and 64.36 mAh g−1 respectively at a current density of 0.5 A g−1. In addition, the ternary NiCo-MnO2 electrode exhibited a better cycling stability compared to NiCo(OH)2 electrode. Notably, an assembled NiCo-MnO2//C-FP hybrid asymmetric supercapattery, displayed a specific capacitance of 130.67 F g−1, high energy and power densities of 48.83 Wh kg−1 and 896.88 W kg−1 at 1 A g−1 respectively. An excellent cycling stability with a coulombic efficiency of 99.98% and capacitance retention of 96.78% was recorded for up to 10,000 cycles within an operating voltage of 1.5 V, at a 3 A g−1 current density." @default.
- W2765247996 created "2017-11-10" @default.
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- W2765247996 date "2018-03-01" @default.
- W2765247996 modified "2023-09-27" @default.
- W2765247996 title "Synthesis of ternary NiCo-MnO2 nanocomposite and its application as a novel high energy supercapattery device" @default.
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- W2765247996 doi "https://doi.org/10.1016/j.cej.2017.10.169" @default.
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