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标题：Ultrathin Nickel Hydroxide and Oxide Nanosheets: Synthesis, Characterizations and Excellent Supercapacitor Performances
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作者：Youqi Zhu ; Chuanbao Cao ; Shi Tao 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2014
卷号：4
DOI：10.1038/srep05787
出版社：Springer Nature
摘要：High-quality ultrathin two-dimensional nanosheets of α-Ni(OH)₂ are synthesized at large scale via microwave-assisted liquid-phase growth under low-temperature atmospheric conditions. After heat treatment, non-layered NiO nanosheets are obtained while maintaining their original frame structure. The well-defined and freestanding nanosheets exhibit a micron-sized planar area and ultrathin thickness ( 2 and NiO nanosheets exhibit enhanced supercapacitor performances. Particularly, the α-Ni(OH)₂ nanosheets exhibit a maximum specific capacitance of 4172.5 F g⁻¹ at a current density of 1 A g⁻¹. Even at higher rate of 16 A g⁻¹, the specific capacitance is still maintained at 2680 F g⁻¹ with 98.5% retention after 2000 cycles. Even more important, we develop a facile and scalable method to produce high-quality ultrathin transition metal hydroxide and oxide nanosheets and make a possibility in commercial applications.