Journal ArticleDOI
Nickel–Cobalt Layered Double Hydroxide Nanosheets for High-performance Supercapacitor Electrode Materials
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TLDR
In this article, a facile and novel one-step method of growing nickel-cobalt layered double hydroxide (Ni-Co LDH) hybrid films with ultrathin nanosheets and porous nanostructures on nickel foam is presented using cetyltrimethylammonium bromide as nanostructure growth assisting agent but without any adscititious alkali sources and oxidants.Abstract:
A facile and novel one-step method of growing nickel-cobalt layered double hydroxide (Ni-Co LDH) hybrid films with ultrathin nanosheets and porous nanostructures on nickel foam is presented using cetyltrimethylammonium bromide as nanostructure growth assisting agent but without any adscititious alkali sources and oxidants. As pseudocapacitors, the as-obtained Ni-Co LDH hybrid film-based electrodes display a significantly enhanced specific capacitance (2682 F g−1 at 3 A g−1, based on active materials) and energy density (77.3 Wh kg−1 at 623 W kg−1), compared to most previously reported electrodes based on nickel-cobalt oxides/hydroxides. Moreover, the asymmetric supercapacitor, with the Ni-Co LDH hybrid film as the positive electrode material and porous freeze-dried reduced graphene oxide (RGO) as the negative electrode material, exhibits an ultrahigh energy density (188 Wh kg−1) at an average power density of 1499 W kg−1 based on the mass of active material, which greatly exceeds the energy densities of most previously reported nickel or cobalt oxide/hydroxide-based asymmetric supercapacitors.read more
Citations
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Biomass-derived C/N co-doped Ni(OH)2/NixSy with a sandwich structure for supercapacitors
TL;DR: In this article, a simple one-step hydrothermal method to obtain carbon and nitrogen co-doped nickel hydroxide/nickel sulfide (C/N-Ni(OH)2/NixSy) with a sandwich structure by using egg white as a precursor was presented.
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Composite material CCO/Co-Ni-Mn LDH made from sacrifice template CCO/ ZIF-67 for high-performance supercapacitor
TL;DR: In this article , the performance of CCO/CNM-2 composite and its application in a solid state asymmetric supercapacitor was investigated. And the impact of load upon the sacrifice template and electrochemical performance of the composite electrode materials was further studied.
Journal ArticleDOI
Fabrication of nickel-foam-supported layered zinc–cobalt hydroxide nanoflakes for high electrochemical performance in supercapacitors
TL;DR: Benefited from the unique structure of Zn-Co hydroxide nanoflakes on a nickel foam substrate, the as prepared materials exhibited an excellent specific capacitance and remarkable cycling stability as electrode materials in supercapacitors.
Journal ArticleDOI
Influence of the composition and crystalline phase of electrodeposited CoNi films in the preparation of CoNi oxidized surfaces as electrodes for urea electro-oxidation
TL;DR: In this paper, the catalytic behavior of the electro-oxidized electrodes for urea electrooxidation was evaluated and the influence of the crystalline phase of the films in the nature of the superficial oxides formed has been demonstrated.
Journal ArticleDOI
Recent progress in trimetallic/ternary-metal oxides nanostructures: Misinterpretation/misconception of electrochemical data and devices
Iftikhar Hussain,Sumanta Sahoo,Debananda Mohapatra,Muhammad Fayyaz Ahmad,Sarmad Iqbal,Muhammad Sufyan Javed,Shuai Shuai Gu,Ning Qin,Charmaine Sj. Lamiel,Kaili Zhang +9 more
TL;DR: In this article , the structure, properties, and electrochemical performance of the trimetallic/ternary-metal oxides-based nanostructures for supercapacitors are summarized.
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What Are Batteries, Fuel Cells, and Supercapacitors?
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TL;DR: Batteries, fuel cells and supercapacitors belong to the same family of energy conversion devices and are needed to service the wide energy requirements of various devices and systems.
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TL;DR: Delamination of LDHs is an interesting route for producing positively charged thin platelets with a thickness of a few atomic layers, which can be used as nanocomposites for polymers or as building units for making new designed organic- inorganic or inorganic-inorganic nanomaterials.