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
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Self-Assembled Three-Dimensional Macroporous Co2(OH)3Cl-MnO2 Spheres Synthesized by Microwave-Assisted Method: A New Hybrid for High-Performance Asymmetric Supercapacitors
TL;DR: In this paper, a 3D Co2(OH)3Cl-MnO2 hybrid sphere was obtained through a facile solvothermal microwave-assisted synthesis method, and an asymmetric supercapacitor device was assembled with the hybrid and active carbon (AC) as the positive and negative electrodes, which yielded a specific capacitance of 49.26 F g-1 and a high energy density of 12.62 Wh kg-1 at a power density of 679.10 W kg−1.
Journal ArticleDOI
A Review of Electrospun Carbon Nanofiber-Based Negative Electrode Materials for Supercapacitors
Arjun Prasad Tiwari,Tanka Mukhiya,Alagan Muthurasu,Kisan Chhetri,Minju Lee,Bipeen Dahal,Prakash Chandra Lohani,Hak Yong Kim +7 more
TL;DR: In this article, a review of the negative electrode materials that have been developed so far is presented and a future perspective on how these limitations can be overcome to meet the demands of next-generation smart devices.
Journal Article
Intercalation of glucose in NiMn-layered double hydroxide nanosheets: An effective path way towards battery-type electrodes with enhanced performance
Lin Lv,Kui Xu,Chundong Wang,Houzhao Wan,Yunjun Ruan,Jia Liu,Rujia Zou,Ling Miao,Kostya Ostrikov,Yucheng Lan,Jianjun Jiang +10 more
TL;DR: In this article, a facile one-pot hydrothermal method was used to expand interlayer distances to enhance cycling stability and break the bottleneck of Ni-based hydroxide in applications.
Journal ArticleDOI
A hollow Co9S8 rod-acidified CNT-NiCoLDH composite providing excellent electrochemical performance in asymmetric supercapacitors.
TL;DR: Co9S8-aCNT-NiCoLDH was used as the positive material to fabricate asymmetric supercapacitors with attractive energy density and power density, which further proved its excellent electrochemical performance.
Journal ArticleDOI
Ultrathin Ni(OH)2 layer coupling with graphene for fast electron/ion transport in supercapacitor
TL;DR: In this article, an effective cyanogel synthetic strategy was demonstrated to prepare ultrathin Ni(OH)2 nanosheets coupling with conductive reduced graphene oxide (rGO) at ambient condition.
References
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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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Journal ArticleDOI
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.