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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Large-Scale Self-Assembly of 3D Flower-like Hierarchical Ni/Co-LDHs Microspheres for High-Performance Flexible Asymmetric Supercapacitors.
TL;DR: A facile and inexpensive and self-assembled strategy to massively fabricate Ni/Co layered double hydroxides (LDHs) with special three-dimensional hierarchical microsphere structure with well-defined flower-like configuration is developed under mild reaction conditions.
Journal ArticleDOI
Hierarchical Zn–Co–S Nanowires as Advanced Electrodes for All Solid State Asymmetric Supercapacitors
TL;DR: In this article, a facile two-step strategy is developed to design the large-scale synthesis of hierarchical, unique porous architecture of ternary metal hydroxide nanowires grown on porous 3D Ni foam and subsequent effective sulfurization.
Journal ArticleDOI
High performance asymmetric supercapacitor twisted from carbon fiber/MnO2 and carbon fiber/MoO3
TL;DR: In this paper, a fiber-shaped asymmetric supercapacitor (ASC) was constructed with the metal oxides having a large work function difference, directly grown on a flexible and conductive carbon fiber (CF) substrate.
Journal ArticleDOI
Ultrafast Self‐Assembly of Graphene Oxide‐Induced Monolithic NiCo–Carbonate Hydroxide Nanowire Architectures with a Superior Volumetric Capacitance for Supercapacitors
TL;DR: In this article, a novel strategy for ultrafast self-assembly of graphene oxides (GO)-induced monolithic NiCo-carbonate hydroxide (NiCo-CH) nanowire composite fi lms (G−CH) is reported.
Journal ArticleDOI
Nickel-based materials for supercapacitors
TL;DR: This review presents a concise compilation of the recent progress in the area of nickel-based materials by categorizing them into several groups based on chemical composition, including nickel oxide/hydroxide, characterized by ultrahigh theoretical capacitance and other intriguing features.
References
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What Are Batteries, Fuel Cells, and Supercapacitors?
Martin Winter,Ralph J. Brodd +1 more
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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Hydrotalcite-type anionic clays: Preparation, properties and applications.
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Recent advances in the synthesis and application of layered double hydroxide (LDH) nanosheets.
Qiang Wang,Dermot O'Hare +1 more
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.