High performance hybrid supercapacitor device based on cobalt manganese layered double hydroxide and activated carbon derived from cork (Quercus Suber)

Ochai-Ejeh, F.O.; Madito, M.J.; Momodu, Damilola Y.; Khaleed, Abubakar A.; Olaniyan, Okikiola; Manyala, Ncholu I.

doi:10.1016/j.electacta.2017.08.163

Cited by 59 publications

(36 citation statements)

References 68 publications

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“…All tests were carried out at normal temperature and pressure. The specific capacitance ( C s ) of CoMn‐LDH was calculated by the discharge curve using Equation

C_{S} ({Fg}^{- 1}) = \frac{2 I}{V^{2} m} \int V d t

where I (A) is the current, t (s) is the discharge time, V (V) is potential difference, and m (g) is the effective mass of the electrodes.…”

Section: Methodsmentioning

confidence: 99%

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Impinging Stream–Rotating Packed‐Bed Reactor Combination Coprecipitation Synthesis of Cobalt–Manganese‐Layered Double Hydroxide for Electrode Materials

et al. 2019

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This article is a study of a novel method for the preparation of cobalt–manganese layered double hydroxide (CoMn‐LDH). An impinging stream–rotating packed‐bed (IS–RPB) reactor is used with a coprecipitation method to prepare CoMn‐LDH. The results show that the IS–RPB reactor has a good strengthening effect on the physical and electrochemical properties of CoMn‐LDH. Compared with CoMn‐LDH prepared by a traditional stirred reactor, the sample prepared by IS–RPB has smaller particle size (187.9 nm), larger specific surface area (92.5 m2 g−1), higher specific capacitance (1477 F g−1 at 1 A g−1), better rate capability (70.2% retention at 5 A g−1), and longer cycling life. All in all, this work provides a means to continuously prepare CoMn‐LDH electrode materials with outstanding performance.

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“…All tests were carried out at normal temperature and pressure. The specific capacitance ( C s ) of CoMn‐LDH was calculated by the discharge curve using Equation

C_{S} ({Fg}^{- 1}) = \frac{2 I}{V^{2} m} \int V d t

where I (A) is the current, t (s) is the discharge time, V (V) is potential difference, and m (g) is the effective mass of the electrodes.…”

Section: Methodsmentioning

confidence: 99%

“…All tests were carried out at normal temperature and pressure. The specific capacitance (C s ) of CoMn-LDH was calculated by the discharge curve using Equation (3) [42] C S ðF g À1 Þ ¼…”

Section: Methodsmentioning

confidence: 99%

Impinging Stream–Rotating Packed‐Bed Reactor Combination Coprecipitation Synthesis of Cobalt–Manganese‐Layered Double Hydroxide for Electrode Materials

et al. 2019

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“…N 2 adsorption/desorption analysis was conducted to explore the pore structure of Mn 2 O 3 −Co 3 O 4 /C at liquid N 2 temperature. The isotherm of the catalyst (Figure a) indicates a type IV with an H3 hysteresis loop, indicating the presence of slit‐shaped mesopores in the Mn 2 O 3 −Co 3 O 4 /C catalyst . The catalyst exhibits a Brunauer−Emmett−Teller (BET) surface area of 225.3 m 2 /g with a pore volume of 0.42 cm 3 /g.…”

Section: Resultsmentioning

confidence: 99%

Highly dispersed Mn₂O₃−Co₃O₄ nanostructures on carbon matrix as heterogeneous Fenton‐like catalyst

Hazarika

Talukdar

Sudarsanam

et al. 2020

Applied Organom Chemis

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This work reports the synthesis of various carbon (Vulcan XC‐72 R) supported metal oxide nanostructures, such as Mn2O3, Co3O4 and Mn2O3−Co3O4 as heterogeneous Fenton‐like catalysts for the degradation of organic dye pollutants, namely Rhodamine B (RB) and Congo Red (CR) in wastewater. The activity results showed that the bimetallic Mn2O3−Co3O4/C catalyst exhibits much higher activity than the monometallic Mn2O3/C and Co3O4/C catalysts for the degradation of both RB and CR pollutants, due to the synergistic properties induced by the Mn−Co and/or Mn (Co)−support interactions. The degradation efficiency of RB and CR was considerably increased with an increase of reaction temperature from 25 to 45°C. Importantly, the bimetallic Mn2O3−Co3O4/C catalyst could maintain its catalytic activity up to five successive cycles, revealing its catalytic durability for wastewater purification. The structure–activity correlations demonstrated a probable mechanism for the degradation of organic dye pollutants in wastewater, involving •OH radical as well as Mn2+/Mn3+ or Co2+/Co3+ redox couple of the Mn2O3−Co3O4/C catalyst.

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“…[5][6][7] Among these materials, the most widely utilized in asymmetric devices is activated carbon as a result of its ease of production, high specic area, good porosity, relatively low cost, and light weight. 8 Generally, the pseudocapacitors operating by the Faraday process possess much more specic capacitance as compared to EDLCs. 9,10 Over the past few years, transition metal oxides have been signicantly engaged as supercapacitor electrode materials.…”

Section: Introductionmentioning

confidence: 99%

Mo-doped ZnO nanoflakes on Ni-foam for asymmetric supercapacitor applications

et al. 2019

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A single-step hydrothermal route for synthesizing molybdenum doped zinc oxide nanoflakes was employed to accomplish superior electrochemical characteristics, such as a specific capacitance of 2296 F g À1 at current density of 1 A g À1 and negligible loss in specific capacitance of 0.01025 F g À1 after each chargedischarge cycle (up to 8000 cycles). An assembled asymmetric supercapacitor (Mo:ZnO@NF//AC@NF) also exhibited a maximum energy density and power density of 39.06 W h/kg and 7425 W kg À1 , respectively. Furthermore, it demonstrated a specific capacitance of 123 F g À1 at 1 A g À1 and retained about 75.6% of its initial capacitance after 8000 cycles. These superior electrochemical characteristics indicate the potential of this supercapacitor for next-generation energy storage devices.

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High performance hybrid supercapacitor device based on cobalt manganese layered double hydroxide and activated carbon derived from cork (Quercus Suber)

Cited by 59 publications

References 68 publications

Impinging Stream–Rotating Packed‐Bed Reactor Combination Coprecipitation Synthesis of Cobalt–Manganese‐Layered Double Hydroxide for Electrode Materials

Impinging Stream–Rotating Packed‐Bed Reactor Combination Coprecipitation Synthesis of Cobalt–Manganese‐Layered Double Hydroxide for Electrode Materials

Highly dispersed Mn₂O₃−Co₃O₄ nanostructures on carbon matrix as heterogeneous Fenton‐like catalyst

Mo-doped ZnO nanoflakes on Ni-foam for asymmetric supercapacitor applications

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High performance hybrid supercapacitor device based on cobalt manganese layered double hydroxide and activated carbon derived from cork (Quercus Suber)

Cited by 59 publications

References 68 publications

Impinging Stream–Rotating Packed‐Bed Reactor Combination Coprecipitation Synthesis of Cobalt–Manganese‐Layered Double Hydroxide for Electrode Materials

Impinging Stream–Rotating Packed‐Bed Reactor Combination Coprecipitation Synthesis of Cobalt–Manganese‐Layered Double Hydroxide for Electrode Materials

Highly dispersed Mn2O3−Co3O4 nanostructures on carbon matrix as heterogeneous Fenton‐like catalyst

Mo-doped ZnO nanoflakes on Ni-foam for asymmetric supercapacitor applications

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Highly dispersed Mn₂O₃−Co₃O₄ nanostructures on carbon matrix as heterogeneous Fenton‐like catalyst