期刊
NANOSCALE
卷 10, 期 19, 页码 8953-8961出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr09626g
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资金
- National Research Foundation (NRF) of Korea [2015R1D1A1A01060743, 2015R1D1A1A01058851, 2015R1A2A2A01004782, 2016R1A6A1A03012877]
- Science & Engineering Research Board, a statutory body of the Department of Science & Technology (DST), Government of India for Ramanujan fellowship
A mesoporous nanoplate network of two-dimensional (2D) layered nickel hydroxide Ni(OH)(2) intercalated with polyoxovanadate anions (Ni(OH)(2) POV) was built using a chemical solution deposition method. This approach will provide high flexibility for controlling the chemical composition and the pore structure of the resulting Ni(OH)(2)-POV nanohybrids. The layer-by-layer ordered growth of the Ni(OH)(2) POV is demonstrated by powder X-ray diffraction and cross-sectional high-resolution transmission electron microscopy. The random growth of the intercalated Ni(OH)(2) -POV nanohybrids leads to the formation of an interconnected network morphology with a highly porous stacking structure whose porosity is controlled by changing the ratio of Ni(OH)(2) and POV. The lateral size and thickness of the Ni(OH)(2)-POV nanoplates are similar to 400 nm and from similar to 5 nm to 7 nm, respectively. The obtained thin films are highly active electrochemical capacitor electrodes with a maximum specific capacity of 1440 F g(-1) at a current density of 1 A g(-1), and they withstand up to 2000 cycles with a capacity retention of 85%. The superior electrochemical performance of the Ni(OH)(2)-POV nanohybrids is attributed to the expanded mesoporous surface area and the intercalation of the POV anions. The experimental findings highlight the outstanding electrochemical functionality of the 2D Ni(OH)(2)-POV nanoplate network that will provide a facile route for the synthesis of low-dimensional hybrid nanomaterials for a highly active supercapacitor electrode.
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