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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Integration of supercapacitors and batteries towards high‐performance hybrid energy storage devices
Journal ArticleDOI
Building next-generation supercapacitors with battery type Ni(OH)2
TL;DR: In this article, the design, fabrication, mechanism, and investigation of Ni(OH)2-based supercapacitors in an asymmetric fashion are discussed. But, the authors do not provide a detailed analysis of the design and implementation of the Ni(O)2 component.
Journal ArticleDOI
Electrochemical Investigations of Magnetic Co3O4 Nanoparticles as an Active Electrode for Supercapacitor Applications
TL;DR: In this article, the performance of cobalt oxide nanoparticles (Co3O4) was analyzed using several analytical tools such as ultraviolet-visible spectroscopy (UV), Fourier transform infrared (FTIR), X-ray diffraction (XRD) pattern, and scanning electron microscope (SEM) with energy dispersive x-ray spectrograph (EDX).
Journal ArticleDOI
High-performance Solid-state Hybrid Energy-storage Device Consisting of Reduced Graphene-Oxide Anchored with NiMn-Layered Double Hydroxide
Moorthy Padmini,Sarigamala Karthik Kiran,Narayanan Lakshminarasimhan,Narayanan Lakshminarasimhan,Marappan Sathish,Marappan Sathish,Perumal Elumalai +6 more
TL;DR: In this article, NiMn-LDH/rGO (NM/RG2) was synthesized by a simple solution-based in situ crystallization process, which was characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field-emission scanning electron (FE-SEM) and high-resolution transmission electron (HR-TEM) microscopic techniques, and surface area and pore size analyses.
Journal ArticleDOI
Hierarchical Ni–Co double hydroxide nanosheets on reduced graphene oxide self-assembled on Ni foam for high-energy hybrid supercapacitors
Yu Jun Yang,Weikun Li +1 more
TL;DR: In this paper, a method for the self-assembly of reduced graphene oxide (rGO) on nickel foam (NF) and subsequent electrodeposition of hierarchical Ni-Co double hydroxide (NiCo-DH) nanosheets (NS) on rGO as a supercapacitor electrode is presented.
References
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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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Recent advances in the synthesis and application of layered double hydroxide (LDH) nanosheets.
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