Facile and scalable fabrication of three-dimensional Cu(OH)(2) nanoporous nanorods for solid-state supercapacitors
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AbstractA facile and scalable one-step anodization method has been developed to fabricate three-dimensional (3-D) Cu(OH)(2) nanoporous nanorods on a copper foil substrate, a product that can be used directly as a binder-free electrode for supercapacitors. The unique morphology of the nanorods provides a large amount of active sites for redox reactions, which can be easily accessed by electrolyte ions. Benefiting from that, a high capacitance of 213 mF cm(-2) is obtained, and superior rate capability (62.3% capacitance retention when the scan rate is increased to 10 times) and excellent cyclability (92.0% capacitance retention after 5000 cycles) are achieved. In addition, a flexible and foldable solid-state asymmetric supercapacitor is assembled using the Cu(OH)(2) and activated carbon as the positive and negative electrodes, respectively. The devices deliver a high energy density of 3.68 mW h cm(-3) and a high power density of 5314 mW cm(-3), demonstrating great potential for next-generation high-rate energy storage systems.
All Author(s) ListChen JZ, Xu JL, Zhou S, Zhao N, Wong CP
Journal nameJournal of Materials Chemistry A
Volume Number3
Issue Number33
Pages17385 - 17391
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesChemistry; Chemistry, Physical; Energy & Fuels; Materials Science; Materials Science, Multidisciplinary

Last updated on 2020-01-12 at 01:22