Amorphous nanostructured FeOOH and Co-Ni double hydroxides for high-performance aqueous asymmetric supercapacitors
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AbstractAmorphous fish-scale-like FeOOH and flower-like Co-Ni double hydroxides (Co-Ni-DH) have been synthesized through one-step electrodeposition. The unique nanostructures of the hydroxides provide a large number of surface active sites, while the amorphous nature of the material systems facilitates the diffusion and reaction of electrolyte ions and enables an isotropic charging/discharging process. Because of these advantages, the FeOOH and Co-Ni-DH electrodes exhibit high pseudocapacitances of 1.11 F cm(-2)/867 F g(-1) and 1.48 F cm(-2)/1201 F g(-1), respectively. In addition, high rate capabilities and superior cyclabilities are achieved. By using the FeOOH and Co-Ni-DH as the anode and cathode, respectively, we have assembled an aqueous asymmetric supercapacitor that delivers a high energy density of 86.4 W h kg(-1)/0.723 mW h cm(-3) and a high power density of 11.6 kW kg(-1)/0.973 mW cm(-3). Moreover, the fabrication process presented in this work is facile, scalable, cost-effective, and environmentally benign, offering a feasible solution for manufacturing next-generation high-performance energy storage devices. (C) 2016 Elsevier Ltd. All rights reserved.
All Author(s) ListChen JZ, Xu JL, Zhou S, Zhao N, Wong CP
Journal nameNano Energy
Year2016
Month3
Day1
Volume Number21
PublisherELSEVIER SCIENCE BV
Pages145 - 153
ISSN2211-2855
eISSN2211-3282
LanguagesEnglish-United Kingdom
KeywordsAmorphous; Aqueous asymmetric supercapacitor; Double hydroxide; Electrodeposition; Iron oxyhydroxide; Nanostructure
Web of Science Subject CategoriesChemistry; Chemistry, Physical; Materials Science; Materials Science, Multidisciplinary; Nanoscience & Nanotechnology; Physics; Physics, Applied; Science & Technology - Other Topics

Last updated on 2020-12-10 at 01:13