Facile In Situ Synthesis of Hierarchical Porous Ni/Ni(OH)2 Hybrid Sponges with Excellent Electrochemical Energy‐Storage Performances for Supercapacitors |
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| Authors: | Wanren Wang Wenhua Wang Dr Mengjiao Wang Prof?Dr Xiaohui Guo |
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| Affiliation: | Key Lab of Synthetic and Natural Functional, Molecule Chemistry of Ministry of Education and the College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (P.?R. China) |
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| Abstract: | Herein, we report the in situ growth of single‐crystalline Ni(OH)2 nanoflakes on a Ni support by using facile hydrothermal processes. The as‐prepared Ni/Ni(OH)2 sponges were well‐characterized by using X‐ray diffraction (XRD), SEM, TEM, and X‐ray photoelectron spectroscopy (XPS) techniques. The results revealed that the nickel‐skeleton‐supported Ni(OH)2 rope‐like aggregates were composed of numerous intercrossed single‐crystal Ni(OH)2 flake‐like units. The Ni/Ni(OH)2 hybrid sponges served as electrodes and displayed ultrahigh specific capacitance (SC=3247 F g?1) and excellent rate‐capability performance, likely owing to fast electron and ion transport, sufficient Faradic redox reaction, and robust structural integrity of the Ni/Ni(OH)2 hybrid electrode. These results support the promising application of Ni(OH)2 nanoflakes as advanced pseudocapacitor materials. |
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| Keywords: | hydrothermal synthesis nickel porous materials supercapacitors supramolecular chemistry |
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