Preparation of Ni-Al layered double hydroxide hollow microspheres for supercapacitor electrode

Wang, Wencong; Zhang, Ning; Shi, Zhenyu; Ye, Ziran; Gao, Qiang; Zhi, Mingjia; Hong, Zhanglian

doi:10.1016/j.cej.2018.01.024

Cited by 204 publications

(59 citation statements)

References 42 publications

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“…When the active materials were immobilized on Ni foam, the current response of the system markedly increased. The virgin LDH exhibited a weak redox peak, which attributed to the reversible redox reaction of Ni 2+ /Ni + valences change . On the contrary, the LDH@PPy exhibited a remarkable increase in the current response, which was assigned to the incorporation of conducting PPy shell.…”

Section: Resultsmentioning

confidence: 96%

Preparation of NiAl double hydroxide@polypyrrole materials for high‐performance supercapacitors

Cao

Zeng

et al. 2019

J Polym Sci B Polym Phys

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A novel NiAl double hydroxide@polypyrrole (LDH@PPy) core–shell material was designed and fabricated by a facile in situ oxidative polymerization of pyrrole (Py) monomer. The microstructure and morphology of the LDH@PPy composites were determined by X‐ray diffractometer, Fourier transform infrared (FTIR), scanning electron microscopy/transmission electron microscopy, and thermogravimetric and differential thermal, revealing that the polypyrrole (PPy) was successfully coated onto the surface of the NiAl‐LDH (LDH) core and the loading amount of PPy impacted the thickness and the dispersion of the conductive PPy shell. The electrochemical performances of the LDH@PPy composites were also evaluated by cyclic voltammogram, electrochemical impedance spectroscopy, and galvanostatic charge–discharge measurements. The results indicated that the supercapacitor performances were attributed to the synergy of unique core–shell heterostructure and each individual component, where the LDH core provided the high‐energy storage capacity and the PPy shell with networks had high electronic conductivity. These shorted the ion diffusion pathway and made electrolyte ions more easily accessible for faradic reactions to enhance the electrochemical performance of the LDH@PPy composites. It was found that the LDH@PPy composite (LDH@PPy7) fabricated at 7 mL∙L−1 of Py monomer feed exhibiting the best electrochemical performances with high specific capacitance of 437.5 F∙g−1 at 2 A∙g−1 and excellent capacitance retention of about 91% after 1000 cycles. The work provides a simple approach for designing organic–inorganic core–shell materials with potential application in supercapacitors. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 1653–1662

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Section: Resultsmentioning

confidence: 96%

Preparation of NiAl double hydroxide@polypyrrole materials for high‐performance supercapacitors

Cao

Zeng

et al. 2019

J Polym Sci B Polym Phys

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“…To further explore the energy storage capacity of the heterostructured Ni‐Mn‐S composite for practical use, an asymmetric supercapacitor device was established in a 6 m KOH solution according to reference . The CV curves of activated carbon (AC) and Ni‐Mn‐S modified electrodes with a three‐electrode implementation at a scan rate of 10 mVs −1 are displayed in Figure A.…”

Section: Resultsmentioning

confidence: 99%

“…To further explore the energy storagec apacity of the heterostructured Ni-Mn-S composite forp ractical use, an asymmetric supercapacitor device was established in a6 m KOH solution according to reference [44].T he CV curveso fa ctivated carbon (AC) and Ni-Mn-Sm odified electrodes with at hree-electrode implementation at as can rate of 10 mVs À1 are displayed in Figure 7A.R eferring to the reportedd ata, the AC can achieve the double-layer capacitance features in KOH solution with the potential window from 0t oÀ1V . [23,45] The correspondingG CD profile of AC/NF shown in Figure S8 reveals at riangle-like shape, implying the occurrence of electrochemical doublelayer capacitance properties and provides as pecific capacitance of 175 Fg À1 at 1Ag À1 .Thus, the total operating potential of the fabricated device is anticipated to reach 1.5 V. To attain optimal electrochemical behavior,t he ratio of the positive to negative electrode was adopted based on this relation [Eq.…”

Section: Electrocapacitivep Erformancesmentioning

confidence: 99%

Rational Design of Porous Structured Nickel Manganese Sulfides Hexagonal Sheets‐in‐Cage Structures as an Advanced Electrode Material for High‐Performance Electrochemical Capacitors

Khalafallah

Zhi

et al. 2020

Chemistry A European J

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The design of hierarchical electrodes comprising multiple components with a high electrical conductivity and a large specific surface area has been recognized as a feasible strategy to remarkably boost pseudocapacitors. Herein, we delineate hexagonal sheets‐in‐cage shaped nickel–manganese sulfides (Ni‐Mn‐S) with nanosized open spaces for supercapacitor applications to realize faster redox reactions and a lower charge‐transfer resistance with a markedly enhanced specific capacitance. The hybrid was facilely prepared through a two‐step hydrothermal method. Benefiting from the synergistic effect between Ni and Mn active sites with the improvement of both ionic and electric conductivity, the resulting Ni‐Mn‐S hybrid displays a high specific capacitance of 1664 F g−1 at a current density of 1 A g−1 and a capacitance of 785 F g−1 is maintained at a current density of 50 A g−1, revealing an outstanding capacity and rate performance. The asymmetric supercapacitor device assembled with the Ni‐Mn‐S hexagonal sheets‐in‐cage as the positive electrode delivers a maximum energy density of 40.4 Wh kg−1 at a power density of 750 W kg−1. Impressively, the cycling retention of the as‐fabricated device after 10 000 cycles at a current density of 10 A g−1 reaches 85.5 %. Thus, this hybrid with superior capacitive performance holds great potential as an effective charge‐storage material.

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“…Cobalt and nickel are the most common active metalst of orm LDHs, such as NiAl LDH [24] and CoAl LDH. [25] Amongt he metal hydroxides, Ni(OH) 2 has received considerable attention due to its low cost, high theoretical specific capacitance, and favorable environmental status.…”

Section: Monoactive-metal Ions In the Host Layersmentioning

confidence: 99%

“…Similar results have also been reported for the Co/Al LDH. With Co, there are two sets of redox couples in the cyclic voltammetry (CV) curves, according to the Faradaic reactions in Equations (1) and (2): [24] Co OH…”

Section: Monoactive-metal Ions In the Host Layersmentioning

confidence: 99%

Recent Progress in Two‐Dimensional Layered Double Hydroxides and Their Derivatives for Supercapacitors

et al. 2020

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High‐performance supercapacitors have attracted great attention due to their high power, fast charging/discharging, long lifetime, and high safety. However, the generally low energy density and overall device performance of supercapacitors limit their applications. In recent years, the design of rational electrode materials has proven to be an effective pathway to improve the capacitive performances of supercapacitors. Layered double hydroxides (LDHs), have shown great potential in new‐generation supercapacitors, due to their unique two‐dimensional layered structures with a high surface area and tunable composition of the host layers and intercalation species. Herein, recent progress in LDH‐based, LDH‐derived, and composite‐type electrode materials targeted for applications in supercapacitors, by tuning the chemical/metal composition, growth morphology, architectures, and device integration, is reviewed. The complicated relationships between the composition, morphology, structure, and capacitive performance are presented. A brief projection is given for the challenges and perspectives of LDHs for energy research.

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Preparation of Ni-Al layered double hydroxide hollow microspheres for supercapacitor electrode

Cited by 204 publications

References 42 publications

Preparation of NiAl double hydroxide@polypyrrole materials for high‐performance supercapacitors

Preparation of NiAl double hydroxide@polypyrrole materials for high‐performance supercapacitors

Rational Design of Porous Structured Nickel Manganese Sulfides Hexagonal Sheets‐in‐Cage Structures as an Advanced Electrode Material for High‐Performance Electrochemical Capacitors

Recent Progress in Two‐Dimensional Layered Double Hydroxides and Their Derivatives for Supercapacitors

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