Journal ArticleDOI
Dodecyl sulfate-induced fast faradic process in nickel cobalt oxide–reduced graphite oxide composite material and its application for asymmetric supercapacitor device
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TLDR
An asymmetric supercapacitor with high energy and power densities has been successfully assembled based on NiCo2O4-reduced graphite oxide composite material and activated carbon as discussed by the authors.Abstract:
In this contribution, we report a facile preparation method of nickel cobalt oxide–reduced graphite oxide (NiCo2O4–rGO) composite material. A fast Faradic process has been realized by sodium dodecyl sulfate (SDS)-induced ultrasmall NiCo2O4 nanocrystals on rGO. As a result, this composite material gives a high specific capacitance of 1222 F g−1 at 0.5 A g−1 and 768 F g−1 at 40 A g−1, showing an outstanding rate capability. An asymmetric supercapacitor device with high energy and power densities has been successfully assembled based on NiCo2O4–rGO composite material and activated carbon. The optimized device shows a high energy density of 23.32 Wh kg−1 at a power density of 324.9 W kg−1. In addition, this asymmetric device shows good stability towards multistage current charge–discharge cycles.read more
Citations
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Review of supercapacitors: Materials and devices
TL;DR: In this paper, a concise description of technologies and working principles of different materials utilized for supercapacitors has been provided, where the main focus has been on materials like carbon-based nanomaterials, metal oxides, conducting polymers and their nanocomposites along with some novel materials like metal-organic frameworks, MXenes, metal nitrides, covalent organic frameworks and black phosphorus.
Journal ArticleDOI
In situ growth of NiCo2S4 nanotube arrays on Ni foam for supercapacitors: Maximizing utilization efficiency at high mass loading to achieve ultrahigh areal pseudocapacitance
Haichao Chen,Jianjun Jiang,Li Zhang,Dandan Xia,Yuandong Zhao,Danqing Guo,Tong Qi,Houzhao Wan +7 more
TL;DR: In this paper, the NiCo2S4 nanotube arrays hybrid electrode exhibits an ultrahigh specific capacitance of 14.39 ± 1.39 µm at 5 µm and cycling stability of 92% after 5000 cycles at a high mass loading of 6 µm.
Journal ArticleDOI
Nickel cobaltite as an emerging material for supercapacitors: An overview
TL;DR: In this article, a review of the nano-architectured NiCo2O4-based electrodes for supercapacitors is presented, which is organized by techniques used for synthesis including chemical methods with and without templates along with their electrochemical properties.
Journal ArticleDOI
NiCo2O4-based materials for electrochemical supercapacitors
Zhibin Wu,Yirong Zhu,Xiaobo Ji +2 more
TL;DR: In this article, the authors analyzed the energy storage mechanism of NiCo2O4, summarized the methodologies and nanostructures discovered in recent years, and pointed out the potential problems and future prospects of utilizing NiCo 2O4-based materials as supercapacitor electrodes.
Journal ArticleDOI
Self-supported formation of hierarchical NiCo2O4 tetragonal microtubes with enhanced electrochemical properties
TL;DR: Hierarchical tetragonal microtubes consisting of ultrathin mesoporous NiCo2O4 nanosheets have been obtained by annealing nickel cobalt layered double hydroxide microTubes which are synthesized by a one-step solvothermal method as discussed by the authors.
References
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Layer-by-Layer Assembly of Ultrathin Composite Films from Micron-Sized Graphite Oxide Sheets and Polycations
N. I. Kovtyukhova,Patricia J. Ollivier,Benjamin R. Martin,Thomas E. Mallouk,Sergey A. Chizhik,and Eugenia V. Buzaneva,Alexandr D. Gorchinskiy +6 more
TL;DR: In this article, unilamellar colloids of graphite oxide (GO) were prepared from natural graphite and were grown as monolayer and multilayer thin films on cationic surfaces by electrostatic self-assembly.